CN114707281A

CN114707281A - Test control method, device and equipment of ball screw pair and storage medium

Info

Publication number: CN114707281A
Application number: CN202210619368.0A
Authority: CN
Inventors: 李磊; 张�杰; 王勇; 方伟
Original assignee: China Automotive Innovation Corp
Current assignee: China Automotive Innovation Corp
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-07-05
Anticipated expiration: 2042-06-02
Also published as: CN114707281B

Abstract

The application discloses a test control method, a device, equipment and a storage medium of a ball screw pair, wherein the method comprises the following steps: determining at least one reference working condition and at least one working condition to be converted corresponding to the at least one reference working condition from a plurality of preset operating working conditions; determining target integration working conditions corresponding to the at least one reference working condition and integration operation duration corresponding to the at least one target integration working condition; determining a target operation time length corresponding to at least one integrated operation time length and a target operation working condition corresponding to at least one target operation time length on the basis of preset reliability information, the actual sample number of the ball screw pair to be detected and the at least one integrated operation time length; and under the condition that the sum of the target running time lengths is less than or equal to a preset testing time length threshold value, controlling each ball screw pair to be tested corresponding to the actual sample number to test based on at least one target running working condition.

Description

Test control method, device and equipment of ball screw pair and storage medium

Technical Field

The present disclosure relates to the field of testing technologies for ball screw assemblies, and in particular, to a method, an apparatus, a device, and a storage medium for testing and controlling a ball screw assembly.

Background

The ball screw pair is one of the most frequently used transmission elements in the precision transmission unit, has the characteristics of high transmission precision, good synchronization performance, high efficiency and the like, and is the most frequently used transmission device with the highest precision in the transmission machinery.

Based on the core function status of the ball screw pair in a product, the reliability of the ball screw pair directly affects the reliability of the whole system, and along with the rapid development of the ball screw pair manufacturing technology, the reliability service life of the ball screw pair under a normal stress level is longer and longer.

Along with the improvement of the reliability of the ball screw pair, the traditional reliability test technology is adopted, the duration of the endurance test of a single ball screw pair reaches several months, the cost of the ball screw pair is high, the batch endurance test means high test cost, and the traditional test technology cannot meet the requirements of fast iteration and development of the market.

Disclosure of Invention

In order to solve the technical problem, the application discloses a test control method of a ball screw pair, under the condition that the total operation time is longer than a preset test time threshold, a plurality of preset operation working conditions are integrated in an accelerated mode, and a sample selection method of reliability confidence coefficient is adopted, so that the total test time is greatly shortened on the premise that the failure mechanism is kept unchanged, the test efficiency is effectively improved, and the test cost is greatly reduced by limiting the test sample amount.

In order to achieve the above object, the present application provides a method for testing and controlling a ball screw assembly, the method comprising:

acquiring a plurality of preset operation working conditions of a ball screw pair to be tested, the total operation time of the ball screw pair to be tested under the preset operation working conditions, preset acceleration configuration information, preset reliability information and preset reliability information; the preset reliability information is used for representing the possibility that the ball screw pair to be tested can be detected to be invalid in the testing process, and the preset reliability information is used for representing the possibility that the ball screw pair to be tested is not invalid in the testing process;

under the condition that the total operation duration is greater than a preset test duration threshold, determining at least one reference working condition and at least one to-be-converted working condition corresponding to the at least one reference working condition from the plurality of preset operation working conditions, wherein the load information of each reference working condition is greater than or equal to the load information of the at least one to-be-converted working condition corresponding to the reference working condition;

determining a target integration working condition corresponding to the at least one reference working condition and an integration operation duration corresponding to the at least one target integration working condition based on the preset acceleration configuration information, the at least one reference working condition and the at least one working condition to be converted;

determining a target operation time length corresponding to the at least one integrated operation time length and a target operation condition corresponding to the at least one target operation time length on the basis of the preset reliability information, the actual sample number of the ball screw pair to be detected and the at least one integrated operation time length;

and under the condition that the sum of the target operation time lengths is less than or equal to the preset test time length threshold, controlling each ball screw pair to be tested corresponding to the actual sample number to test based on at least one target operation condition.

In some embodiments, the at least one reference condition comprises at least one target reference condition; the determining, based on the preset acceleration configuration information, the at least one reference working condition, and the at least one working condition to be converted, a target integration working condition corresponding to the at least one reference working condition, and an integration operation duration corresponding to the at least one target integration working condition, includes:

determining a target working condition to be converted corresponding to the target reference working condition in the at least one reference working condition based on the at least one reference working condition and the at least one working condition to be converted;

acquiring a first operation parameter and a first operation duration corresponding to the target reference working condition and a second operation parameter corresponding to the target working condition to be converted;

and determining a target integration working condition corresponding to the target reference working condition and an integration operation duration corresponding to the target integration working condition based on the preset acceleration configuration information, the first operation parameter, the first operation duration and the second operation parameter.

In some embodiments, the determining, based on the preset acceleration configuration information, the first operating parameter, the first operating duration, and the second operating parameter, a target integrated operating condition corresponding to the target reference operating condition and an integrated operating duration corresponding to the target integrated operating condition includes:

performing accelerated conversion processing on the second operation parameter based on the first operation parameter and the preset accelerated configuration information to obtain a target conversion operation parameter and a target conversion working condition corresponding to the target conversion operation parameter;

determining a target integration working condition corresponding to the target reference working condition based on the target reference working condition and the target conversion working condition;

determining a second operation duration corresponding to the target conversion working condition based on the target conversion operation parameter;

and determining the integration operation time length corresponding to the target integration working condition based on the first operation time length and the second operation time length.

In some embodiments, the target transition operating parameters include a target rotational speed, a target axial load, a target motion trip, and a target frequency; the performing accelerated conversion processing on the second operation parameter based on the first operation parameter and the preset accelerated configuration information to obtain a target conversion operation parameter includes:

determining a first rotating speed, a first axial load and a first moving stroke corresponding to the target reference working condition based on the first operating parameter;

determining a second rotating speed, a second axial load, a second movement stroke and a second frequency corresponding to the target working condition to be converted based on the second operating parameter;

respectively converting the second rotating speed, the second axial load and the second movement stroke based on the first rotating speed, the first axial load and the first movement stroke to obtain the target rotating speed, the target axial load and the target movement stroke;

determining the target frequency based on the preset acceleration configuration information, the target rotating speed, the target axial load, the target movement stroke, the second frequency, the second rotating speed, the second axial load and the second movement stroke.

In some embodiments, the determining, based on the preset reliability information, the actual number of samples of the ball screw pair to be tested, and at least one integrated operation time length, a target operation time length corresponding to each of the at least one integrated operation time length includes:

determining the number of target samples to be tested based on the preset reliability information and the preset reliability information;

and determining the target operation time length corresponding to the at least one target integration working condition based on the preset confidence information, the preset reliability information, the target number of samples to be tested, the actual number of samples of the ball screw pair to be tested and the at least one integration operation time length.

In some embodiments, obtaining the total operation duration of the ball screw pair to be tested under the preset operation conditions includes:

acquiring preset operation parameters corresponding to the plurality of preset operation conditions;

determining initial operation time lengths corresponding to the preset operation working conditions based on a plurality of preset operation parameters;

and determining the total operation time length of the ball screw pair to be tested under the preset operation working conditions based on a plurality of initial operation time lengths.

In some embodiments, the method further comprises:

in the process of controlling each ball screw pair to be tested corresponding to the actual sample number to test based on the at least one target integration condition, acquiring at least one of friction torque information, stroke error information, noise information and vibration information of the ball screw pair to be tested in the operation process;

and determining the reliability of the ball screw pair to be tested based on at least one of the friction torque information, the stroke error information, the noise information and the vibration information and preset calibration conditions corresponding to the friction torque information, the stroke error information, the noise information and the vibration information.

In some embodiments, the method further comprises:

and under the condition that the sum of the target operation time lengths is greater than a preset test time length threshold, sequentially repeating the steps from the step of confirming the reference working condition and the working condition to be converted to the step of determining the target operation time length until the sum of the target operation time lengths is less than or equal to the preset test time length threshold.

The application also provides a test control device of the ball screw pair, the device comprises:

the system comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for acquiring a plurality of preset operation working conditions of a ball screw pair to be detected, the total operation time of the ball screw pair to be detected under the preset operation working conditions, preset acceleration configuration information, preset reliability information and preset reliability information; the preset reliability information is used for representing the possibility that the ball screw pair to be tested can be detected to be invalid in the testing process, and the preset reliability information is used for representing the possibility that the ball screw pair to be tested is not invalid in the testing process;

the first determining module is used for determining at least one reference working condition and at least one to-be-converted working condition corresponding to the at least one reference working condition from the plurality of preset operating working conditions under the condition that the total operating time is greater than a preset test time threshold, and the load information of each reference working condition is greater than or equal to the load information of the at least one to-be-converted working condition corresponding to the reference working condition;

the second determining module is used for determining a target integration working condition corresponding to the at least one reference working condition and an integration operation duration corresponding to the at least one target integration working condition based on preset acceleration configuration information, the at least one reference working condition and the at least one working condition to be converted;

the third determining module is used for determining a target operation time length corresponding to the at least one integrated operation time length and a target operation working condition corresponding to the at least one target operation time length based on the preset reliability information, the actual sample number of the ball screw pair to be detected and the at least one integrated operation time length;

and the control module is used for controlling each ball screw pair to be tested corresponding to the actual sample number to test based on at least one target operation condition under the condition that the sum of the target operation time lengths is less than or equal to the preset test time length threshold value.

The application also provides a test control device of the ball screw pair, the device comprises a processor and a memory, wherein at least one instruction or at least one program is stored in the memory, and the at least one instruction or the at least one program is loaded and executed by the processor to realize the test control method of the ball screw pair.

The application also provides a computer readable storage medium, wherein at least one instruction or at least one program is stored in the storage medium, and the at least one instruction or the at least one program is loaded by a processor and executes the test control method of the ball screw pair.

The embodiment of the application has the following beneficial effects:

according to the test control method of the ball screw pair, under the condition that the total operation time is longer than the preset test time threshold, the multiple preset operation working conditions are integrated in an accelerated mode, and the sample selection method of the reliability confidence coefficient is adopted, the total test time is greatly shortened on the premise that the failure mechanism is kept unchanged, the test efficiency is effectively improved, and meanwhile the test cost is greatly reduced by limiting the test sample amount.

Drawings

In order to more clearly illustrate the method, device and apparatus for testing and controlling the ball screw assembly described in the present application, the drawings required for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an implementation environment of test control of a ball screw assembly according to an embodiment of the present disclosure;

fig. 2 is a schematic flowchart of a method for testing and controlling a ball screw assembly according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart of a method for determining an integrated operation condition and an integrated operation duration according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a method for determining target conversion operation parameters according to an embodiment of the present application;

fig. 5 is a schematic diagram of a target operation condition for testing a ball screw pair to be tested according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a test control device for a ball screw assembly according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, a schematic diagram of an implementation environment provided by an embodiment of the present application is shown, where the implementation environment may include:

at least one terminal 01 and at least one server 02. The at least one terminal 01 and the at least one server 02 may perform data communication through a network.

In an alternative embodiment, the terminal 01 may be an executor of a test control method of a ball screw pair. Terminal 01 may include, but is not limited to, vehicle terminals, smart phones, desktop computers, tablet computers, laptop computers, smart speakers, digital assistants, Augmented Reality (AR)/Virtual Reality (VR) devices, smart wearable devices, and other types of electronic devices. The operating system running on terminal 01 may include, but is not limited to, an android system, an IOS system, linux, windows, Unix, and the like.

The server 02 can provide the terminal 01 with preset operation conditions, preset acceleration configuration information, preset reliability information and preset reliability information of the ball screw pair to be tested. Optionally, the server 02 may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing basic cloud computing services such as a cloud service, a cloud database, cloud computing, a cloud function, cloud storage, a Network service, cloud communication, a middleware service, a domain name service, a security service, a CDN (Content Delivery Network), a big data and artificial intelligence platform, and the like.

Referring to fig. 2, which is a schematic flow chart illustrating a method for testing and controlling a ball screw assembly according to an embodiment of the present application, the present specification provides the method steps according to the embodiment or the flowchart, but based on the conventional method; or the inventive process may include additional or fewer steps. The step sequence recited in the embodiment is only one of the execution sequences of the plurality of steps, and does not represent the only execution sequence, and the test control method of the ball screw assembly can be executed according to the method sequence shown in the embodiment or the attached drawings. Specifically, as shown in fig. 2, the method includes:

s201, obtaining a plurality of preset operation working conditions of the ball screw pair to be tested, the total operation time of the ball screw pair to be tested under the plurality of preset operation working conditions, preset acceleration configuration information, preset reliability information and preset reliability information.

In this embodiment of the application, the preset operation condition may be a preset operation condition for testing the ball screw pair to be tested. The preset operation condition may include preset operation parameters of the ball screw pair, such as an operation speed, an axial load, a movement stroke, a movement frequency, a lead and the like of the ball screw pair. The preset operation condition may include at least two, for example, 9. The total operation time length may be the sum of the operation time lengths of the ball screw pair to be tested under each preset operation condition. The preset acceleration configuration information may be model information for performing acceleration conversion on the operation condition, for example, the preset acceleration configuration information may be an operation duration corresponding to the operation condition, and a time model for acceleration failure. The preset reliability information is used for representing the possibility that the ball screw pair to be tested can be detected to be invalid in the testing process. The failure of the ball screw pair to be tested can be the failure of any part of the ball screw pair to be tested. The preset confidence information may be measured in probability, such as confidence C; the preset reliability information is used for representing the possibility that the ball screw pair to be tested does not lose efficacy in the testing process. The preset reliability information may be measured in probability, such as reliability R. The preset reliability information may be a standard set before testing to estimate a true reliability level through testing.

Optionally, preset operation parameters corresponding to a plurality of preset operation conditions may be obtained; and determining the total operation time length based on the preset operation parameters.

In one example, an initial operation duration corresponding to each of a plurality of preset operation conditions may be determined based on a plurality of preset operation parameters; and determining the sum of the plurality of initial operation time lengths as the total operation time length.

Further, for each preset operation condition, the rotation speed information, the movement stroke information, the movement frequency information and the lead information corresponding to the preset operation condition can be determined based on preset operation parameters corresponding to the preset operation condition; and determining the initial operation duration corresponding to the preset operation condition based on the rotation speed information, the movement stroke information, the movement frequency information and the lead information.

Specifically, the initial operation time period may be determined based on the first model.

Model one:

wherein, the first and the second end of the pipe are connected with each other,

the initial operation time corresponding to the ith operation condition is long, k is a safety factor, and the value range is as follows: 1.0 to 1.3;

for the rotation speed of the i-th operation condition,

is composed of

The motion stroke of the ball screw pair at the rotating speed;

is composed of

The motion frequency of the ball screw pair at the rotating speed;

is the lead of the ball screw pair.

In another example, the total operation time of the ball screw pair to be tested under a plurality of preset operation conditions may be determined based on a plurality of preset operation parameters and the number of preset operation conditions.

Further, rotation speed information, movement stroke information, movement frequency information and lead information corresponding to a plurality of preset operation conditions can be determined based on a plurality of preset operation parameters; and determining the total operation duration based on the number of the preset operation conditions, the rotation speed information, the movement stroke information, the movement frequency information and the lead information corresponding to the plurality of preset operation conditions.

Specifically, the total operating time may be determined based on model two.

Model two:

wherein the content of the first and second substances,

for the initial operation duration that ith kind of operating condition corresponds, k is factor of safety, the value range: 1.0 to 1.3;

for the rotation speed of the i-th operation condition,

is composed of

The motion stroke of the ball screw pair at the rotating speed;

is composed of

The motion frequency of the ball screw pair at the rotating speed;

the number of the operation conditions is preset for the lead of the ball screw pair and n.

S202, under the condition that the total operation duration is greater than the preset test duration threshold, at least one reference working condition and at least one to-be-converted working condition corresponding to the at least one reference working condition are determined from the plurality of preset operation working conditions, and the load information of each reference working condition is greater than or equal to the load information of the at least one to-be-converted working condition corresponding to the reference working condition.

In this embodiment of the application, the preset test duration threshold may be a duration corresponding to a project test period for testing the ball screw pair to be tested. The reference condition may refer to an operation condition that can be a reference for the acceleration transition among a plurality of preset operation conditions. The reference condition includes at least one, for example, the reference condition may include three. The working condition to be converted can refer to the operation working condition needing accelerated conversion. Each reference working condition corresponds to at least one working condition to be converted, for example, each reference working condition may correspond to two working conditions to be converted.

Optionally, at least one reference working condition and at least one to-be-converted working condition corresponding to the at least one reference working condition may be determined from the multiple preset operating working conditions based on preset operating parameters corresponding to the multiple preset operating working conditions.

In one example, at least one reference condition and at least one to-be-converted condition corresponding to the at least one reference condition may be determined from the plurality of preset operating conditions based on load information corresponding to the plurality of preset operating conditions. Each reference condition may correspond to a different level of loading. For example, light, medium and heavy loads may be included, where the levels may be predetermined. Further, when the reference working conditions include three, the three reference working conditions can respectively cover a light load working condition, a medium load working condition and a heavy load working condition. The reference working condition selected in the mode is high in representativeness.

S203, determining a target integration working condition corresponding to at least one reference working condition and an integration operation duration corresponding to at least one target integration working condition based on preset acceleration configuration information, at least one reference working condition and at least one working condition to be converted.

In the embodiment of the application, each reference working condition corresponds to one target integration working condition; the operation parameters of the target integration working condition, such as the operation speed, the axial load, the movement stroke and the like, are the same as the parameters in the reference working condition corresponding to the target integration working condition; the movement frequency of the target integration working condition is the sum of the reference working condition corresponding to the target integration working condition and the movement frequency corresponding to the converted working condition to be converted. Each target integration condition corresponds to an integration operation duration.

Optionally, a reference operating parameter corresponding to at least one reference working condition and an operating parameter to be converted corresponding to at least one working condition to be converted may be obtained; and determining a target integration working condition corresponding to at least one reference working condition and an integration operation duration corresponding to at least one target integration working condition based on preset acceleration configuration information, at least one reference operation parameter and at least one to-be-converted operation parameter. The at least one reference condition may include at least one target reference condition, the reference operating parameter may include at least one second operating parameter, and each target reference condition corresponds to one second operating parameter. The at least one working condition to be converted can comprise at least one target working condition to be converted, and the operating parameters to be converted can comprise at least one first operating parameter; each target working condition to be converted corresponds to one first operation parameter.

S204, determining a target operation time length corresponding to at least one integrated operation time length and a target operation condition corresponding to at least one target operation time length based on the preset reliability information, the actual sample number of the ball screw pair to be detected and the at least one integrated operation time length.

In the embodiment of the application, the target operation duration can be the operation duration after the integral operation duration is prolonged, and the operation duration of the ball screw pair to be tested with the actual number of samples in the test process can be represented. The target operation condition may refer to an operation condition in which the operation frequency and the operation duration corresponding to the target integration condition are extended. The movement frequency corresponding to the target integration working condition is converted by adopting a method of converting the operation duration; and obtaining the movement frequency corresponding to the target operation condition.

Optionally, the number of target samples to be tested can be determined based on the preset reliability information and the preset reliability information; and determining the target operation time length corresponding to at least one integration operation time length based on the target number of samples to be tested, the actual number of samples of the ball screw pair to be tested and at least one integration operation time length. The target number of samples to be tested may be the minimum number of samples to be tested to achieve the preset confidence level and the preset reliability level.

Specifically, the target number of samples to be tested may be determined based on model four.

Model six:

and C is the confidence corresponding to the preset confidence information, R is the reliability corresponding to the preset reliability information, and y is the number of the target samples to be tested.

In one example, in a case that the actual number of samples is greater than or equal to the target number of samples to be measured, the at least one integrated operation time length may be determined as a target operation time length corresponding to each of the at least one integrated operation time length.

In another example, in the case that the actual number of samples is smaller than the target number of samples to be tested, the target operation duration corresponding to each of the at least one integrated operation duration may be determined based on the preset reliability information, the target number of samples to be tested, the actual number of samples, and the at least one integrated operation duration.

Further, a sample number optimization model can be determined based on preset confidence level information and preset reliability information; and determining the target operation duration corresponding to each of the at least one integrated operation duration based on the sample number optimization model, the target to-be-tested sample number, the actual sample number and the at least one integrated operation duration.

Specifically, the target operation time period may be determined based on the model five.

A seventh model:

wherein, the model five can be obtained by converting the model four and the model six.

Model six:

model eight:

wherein, t₁Is a target running time length, y₁For an operating time period of t₁Number of samples (actual number of samples), t₂To integrate the run length; y is₂For an operating time period of t₂The number of samples (target samples to be measured) of (1), beta is the Weibull slope; the value range is as follows: 3 to 5. The Weibull slope is preset and can be determined based on similar part test data and engineering experiment experience.

After the movement frequency and the integrated operation duration of the integrated working condition are converted by adopting the method, the target operation parameters and the target operation duration corresponding to each target operation condition can be displayed.

S205, under the condition that the sum of the target running time lengths is smaller than or equal to the preset testing time length threshold, controlling each ball screw pair to be tested corresponding to the actual sample number to test based on at least one target running working condition.

In this embodiment of the application, the sum of the target operation durations may be a total duration of operations required by each integrated operation condition after the step-by-step acceleration processing is performed on the preset operation condition.

Under the condition that the sum of the target running time lengths is less than or equal to the preset testing time length threshold, before controlling each ball screw pair to be tested corresponding to the actual sample number to perform testing based on at least one target integration working condition, the method further comprises the following steps:

and judging whether the sum of the target running time lengths is less than or equal to a preset test time length threshold value or not.

In some embodiments, if the sum of the target operation durations is less than or equal to the preset test duration threshold, controlling each ball screw pair to be tested corresponding to the actual sample number to perform a test based on at least one target integration condition.

In an exemplary embodiment, in the process of controlling each ball screw pair to be tested corresponding to the actual sample number to perform testing based on at least one target integration condition, at least one of friction torque information, stroke error information, noise information and vibration information of the ball screw pair to be tested in the operation process is acquired;

Optionally, for each ball to be tested, it may be determined that the ball screw pair to be tested is not qualified under the condition that at least one of the friction torque information, the stroke error information, the noise information and the vibration information satisfies the corresponding preset calibration condition. The preset calibration condition may be set according to an initial value of the start of the test of corresponding information (e.g., friction torque information, stroke error information, noise information, vibration information, and the like). The preset calibration conditions may include a friction torque calibration threshold, a stroke error calibration threshold, a noise calibration threshold, and a vibration calibration threshold. For example, the friction torque calibration threshold may be 170% -220% times the friction torque at the beginning of the test; preferably, it may be 200%. The stroke error calibration threshold value can be 270-320% times of the stroke error at the beginning of the test; preferably, it may be 300%. The noise calibration threshold may be 130% -170% times the noise at the start of the test; preferably it may be 150%. The vibration calibration threshold may be 130% -170% times the vibration frequency at the start of the test; preferably it may be 150%.

In one example, if the friction torque corresponding to the friction torque information is greater than the friction torque calibration threshold or the stroke error corresponding to the stroke error information is greater than the stroke error calibration threshold; or the noise corresponding to the noise information is larger than the noise calibration threshold; or the vibration frequency corresponding to the vibration information is greater than the vibration calibration threshold value. According to the method and the device, the friction torque information, the stroke error information, the noise information and the vibration information are used as failure evaluation indexes to monitor the ball screw pair to be tested in the testing process, the reliability of the ball screw pair to be tested can be rapidly known, and the testing is timely stopped under the condition that at least one of the friction torque information, the stroke error information, the noise information and the vibration information does not meet the preset calibration condition, so that the cost is saved.

In another embodiment, if the sum of the target operation durations is greater than the preset test duration threshold, the confirming steps of the reference working condition and the working condition to be converted to the determining step of the target operation duration are sequentially repeated until the sum of the target operation durations is less than or equal to the preset test duration threshold.

In the embodiment, under the condition that the total operation time is longer than the preset test time threshold, a plurality of preset operation working conditions are accelerated and integrated, and a sample selection method of reliability confidence coefficient is adopted, the total test time is greatly shortened on the premise that the failure mechanism is not changed, the test efficiency is effectively improved, and the test cost is greatly reduced by limiting the test sample amount. The mode is favorable for rapidly exposing the design defects and the production defects of the ball screw pair to be tested, and the optimized design is carried out based on the test result, so that the defective products are prevented from being applied to high-precision equipment.

In an exemplary embodiment, as shown in fig. 3, a flowchart of a method for determining an integrated operation condition and an integrated operation duration provided by the embodiment of the present application is shown; the details are as follows.

S301, determining a target working condition to be converted corresponding to a target reference working condition in at least one reference working condition based on at least one reference working condition and at least one working condition to be converted.

In the embodiment of the application, a target reference working condition can be determined from at least one reference working condition; and determining a target conversion working condition corresponding to the target reference working condition from at least one working condition to be converted based on the target reference working condition. The target transition conditions may include one or more.

S302, a first operation parameter and a first operation duration corresponding to the target reference working condition and a second operation parameter corresponding to the target working condition to be converted are obtained.

In the embodiment of the application, the first operation parameter corresponding to the target reference working condition may be a preset operation parameter corresponding to the reference working condition; the first operation period may be an initial operation period corresponding to the reference condition.

The second operation parameter corresponding to the target to-be-converted working condition may be a preset operation parameter corresponding to the to-be-converted working condition.

And S303, determining a target integration working condition corresponding to the target reference working condition and an integration operation duration corresponding to the target integration working condition based on the preset acceleration configuration information, the first operation parameter, the first operation duration and the second operation parameter.

Optionally, the second operation parameter may be subjected to accelerated conversion processing based on the first operation parameter and preset accelerated configuration information, so as to obtain a target conversion operation parameter and a target conversion working condition corresponding to the target conversion operation parameter; and determining a target integration working condition corresponding to the target reference working condition based on the target reference working condition and the target conversion working condition. The parameters of the target conversion operation parameters, such as the operation speed, the axial load, the movement stroke and the like, are the same as those of the first operation parameters; the frequency of motion in the target transition operating parameter is different from the frequency of motion in the first operating parameter.

In one example, a target integrated operation parameter may be determined based on a first operation parameter corresponding to a target reference condition and a target transition operation parameter corresponding to a target transition condition; a target integrated condition is determined based on the target integrated operating parameters.

Further, the same parameters of the first operating parameter and the target conversion operating parameter, such as the operating speed, the axial load, the moving stroke and the like, may be directly used as the operating speed, the axial load, the moving stroke and the like in the target integration operating parameter. And determining the sum of the motion frequency in the first operation parameter and the target conversion operation parameter as the motion frequency in the target integration operation parameter.

Optionally, a second operation duration corresponding to the target conversion working condition may be determined based on the target conversion operation parameter; and determining the integration operation duration corresponding to the target integration working condition based on the first operation duration and the second operation duration.

Specifically, the second operation duration may be calculated by using the first model.

Further, a sum of the first operation time period and the second operation time period may be determined as the integrated operation time period.

In one example, the target transition operating parameters include a target rotational speed, a target axial load, a target motion trip, and a target frequency; and the integrated operation frequency in the integrated operation working condition is equal to the sum of the first frequency corresponding to the target reference working condition and the target frequency.

In this embodiment, the integrated operation duration and the target integrated operation condition are determined according to the preset technical configuration information, so that the operation parameters and the integrated operation duration corresponding to the target integrated operation condition can be obtained accurately.

In an exemplary embodiment, as shown in fig. 4, a flow chart of a method for determining a target transition operation parameter provided in the embodiment of the present application is shown; the details are as follows.

S401, determining a first rotating speed, a first axial load and a first movement stroke corresponding to a target reference working condition based on a first operation parameter;

s402, determining a second rotating speed, a second axial load, a second movement stroke and a second frequency corresponding to the target working condition to be converted based on the second operation parameter.

And S403, respectively converting the second rotating speed, the second axial load and the second movement stroke based on the first rotating speed, the first axial load and the first movement stroke to obtain a target rotating speed, a target axial load and a target movement stroke.

In the embodiment of the application, the second rotating speed can be converted into the first rotating speed, the second axial load can be converted into the first axial load, and the second movement stroke can be converted into the first movement stroke; that is, the target rotational speed is equal to the first rotational speed, the target axial load is equal to the first axial load, and the target movement stroke is equal to the first movement stroke.

S404, determining the target frequency based on the preset acceleration configuration information, the target rotating speed, the target axial load, the target moving stroke, the second frequency, the second rotating speed, the second axial load and the second moving stroke.

In this embodiment of the application, the target frequency may be determined by performing acceleration processing on the second frequency based on preset acceleration configuration information, the target rotation speed, the target axial load, the target movement stroke, the second rotation speed, the second axial load, and the second movement stroke.

Specifically, the third operation time period may be determined based on the model three.

And (3) model III:

wherein, F₁Is a second load in the target to-be-converted operating condition, F₂The target load under the target conversion working condition is obtained; n is a radical of₁At the second rotation speed, N₂Is a target rotation speed; l is₁A second motion stroke; l is₂Is a target motion stroke; s₁A second frequency; s₂Target frequency.

The further model three can be obtained by converting and calculating the model four and the model five:

and (4) model IV:

and a fifth model:

wherein L is_hThe running time of the ball screw pair is unit h; n is_mThe equivalent rotating speed of the ball screw pair is shown as unit r/min, Ca is the rated dynamic load of the ball screw pair and is shown as unit N; fm is equivalent load of the ball screw pair, and the unit is N; l is_h1、L_h2The unit is the practical operation time under different load working conditions.

In the embodiment, the acceleration factor is determined based on the operable time length of the ball screw pair; the frequency of each working condition to be converted is converted based on each acceleration factor, so that the frequency information of the target working condition to be converted is converted in an equal proportion, more accurate frequency information is obtained, and further target conversion operation parameters corresponding to the target working condition can be converted.

In an exemplary embodiment, when the preset operation condition is 9, the number of the ball screw pairs to be tested is 6, the preset reliability information is 90%, and the lead of the ball screw pairs to be tested is 3mm, the design of the test control method for the ball screw pairs is as follows:

as shown in table 1, there are 9 preset operating conditions and preset operating parameters for each preset operating condition.

TABLE 1

And the table 2 shows the initial operation time length and the total operation time length corresponding to each preset operation condition.

TABLE 2

In performing the run length calculation, a calculation may be performed based on the above-described model one and model two, where k equals 1 in this test.

As shown in table 3, reference conditions and conditions to be converted are shown, where the reference conditions include condition 3, condition 6 and condition 9; wherein, the working condition 3, the working condition 6 and the working condition 9 respectively correspond to a light load working condition, a medium load working condition and a heavy load working condition. In addition, the target to-be-converted working conditions corresponding to the target reference working condition 3 are a disclosure 1 and a working condition 2; the target to-be-converted working condition corresponding to the target reference working condition 6 is a working condition 4 and a working condition 5; the target to-be-converted working condition corresponding to the target reference working condition 9 is a public disclosure 7 and a working condition 8. And shows the target conversion condition, the target conversion operation parameter and the operation time length after conversion based on each target to-be-converted condition.

TABLE 3

As shown in table 4, the target integrated condition after the target transition condition is integrated with the target reference condition, the target integrated operation parameters corresponding to the target integrated condition, and the integrated operation duration corresponding to each target integrated condition are shown.

TABLE 4

Then, based on the requirement that the confidence information is 90% and the reliability information is 90% in the test control method, the target to-be-tested sample number is 22 according to the confidence information, the reliability information and the model six.

Model six:

；

can be derived to y₂Equal to 22.

And determining the target operation duration according to the actual sample number 6, the integration operation duration corresponding to the target integration working condition and the model seven.

A seventh model:

；

the target operation duration after conversion by the reliability and the confidence and the actual sample number and the corresponding target operation condition are shown in table 5.

TABLE 5

If the operation duration 210.76h is less than or equal to the preset test duration threshold, the 6 ball screw pairs to be tested can be controlled to perform reliability tests based on the target operation condition 3, the target operation condition 6 and the target operation condition 9. Fig. 5 is a schematic diagram illustrating a target operation condition for testing a ball screw assembly to be tested according to an embodiment of the present application. In the testing process, the ball screw pair to be tested is tested based on the three target operation conditions and the respective corresponding operation time lengths of the three target operation conditions.

An embodiment of the present application further provides a test control device for a ball screw assembly, as shown in fig. 6, which is a schematic structural diagram of the test control device for a ball screw assembly provided in the embodiment of the present application; specifically, the device comprises:

the acquiring module 601 is configured to acquire multiple preset operation conditions of a ball screw pair to be detected, total operation duration of the ball screw pair to be detected under the multiple preset operation conditions, preset acceleration configuration information, preset reliability information, and preset reliability information; the preset reliability information is used for representing the possibility that the ball screw pair to be tested can be detected to be invalid in the testing process, and the preset reliability information is used for representing the possibility that the ball screw pair to be tested is not invalid in the testing process;

a first determining module 602, configured to determine, when the total operation duration is greater than a preset test duration threshold, at least one reference working condition and at least one to-be-converted working condition corresponding to the at least one reference working condition from the multiple preset operation working conditions, where load information of each reference working condition is greater than or equal to load information of the at least one to-be-converted working condition corresponding to the reference working condition;

a second determining module 603, configured to determine, based on preset acceleration configuration information, the at least one reference working condition, and the at least one working condition to be converted, a target integration working condition corresponding to each of the at least one reference working condition, and an integration operation duration corresponding to each of the at least one target integration working condition;

a third determining module 604, configured to determine, based on the preset reliability information, the actual number of samples of the ball screw pair to be tested, and the at least one integrated operation duration, a target operation duration corresponding to each of the at least one integrated operation duration and a target operation condition corresponding to each of the at least one target operation duration;

and the control module 605 is configured to control each to-be-tested ball screw pair corresponding to the actual sample number to perform a test based on the at least one target operation condition when the sum of the target operation durations is less than or equal to the preset test duration threshold.

In this embodiment of the present application, the second determining module 603 includes:

the first determining unit is used for determining a target working condition to be converted corresponding to the target reference working condition in the at least one reference working condition based on the at least one reference working condition and the at least one working condition to be converted;

the first acquisition unit is used for acquiring a first operation parameter and a first operation duration corresponding to the target reference working condition and a second operation parameter corresponding to the target working condition to be converted;

and the second determining unit is used for determining a target integration working condition corresponding to the target reference working condition and an integration operation time length corresponding to the target integration working condition based on the preset acceleration configuration information, the first operation parameter, the first operation time length and the second operation parameter.

In an embodiment of the present application, the second determining unit includes:

the conversion processing subunit is configured to perform accelerated conversion processing on the second operation parameter based on the first operation parameter and the preset accelerated configuration information to obtain a target conversion operation parameter and a target conversion working condition corresponding to the target conversion operation parameter;

the first determining subunit is used for determining a target integration working condition corresponding to the target reference working condition based on the target reference working condition and the target conversion working condition;

the second determining subunit is used for determining a second operation duration corresponding to the target conversion working condition based on the target conversion operation parameter;

and the third determining subunit is configured to determine, based on the first operation duration and the second operation duration, an integrated operation duration corresponding to the target integrated operating condition.

In an embodiment of the present application, the conversion processing subunit includes:

the first determining submodule is used for determining a first rotating speed, a first axial load and a first moving stroke corresponding to the target reference working condition based on the first operating parameter;

the second determining submodule is used for determining a second rotating speed, a second axial load, a second movement stroke and a second frequency corresponding to the target working condition to be converted based on the second operating parameter;

the conversion sub-module is used for respectively converting the second rotating speed, the second axial load and the second movement stroke based on the first rotating speed, the first axial load and the first movement stroke to obtain the target rotating speed, the target axial load and the target movement stroke;

a third determining submodule, configured to determine the target frequency based on the preset acceleration configuration information, the target rotation speed, the target axial load, the target movement stroke, the second frequency, the second rotation speed, the second axial load, and the second movement stroke.

In an embodiment of the present application, the third determining module 604 includes:

a third determining unit, configured to determine the number of target samples to be tested based on the preset reliability information and the preset reliability information;

and the fourth determining unit is used for determining the target operation time length corresponding to each of the at least one target integration working condition based on the preset reliability information, the target number of samples to be tested, the actual number of samples of the ball screw pair to be tested and the at least one integration operation time length.

In this embodiment of the present application, the obtaining module 601 further includes:

the second acquisition unit is used for acquiring preset operation parameters corresponding to the plurality of preset operation conditions;

a fifth determining unit, configured to determine, based on a plurality of preset operation parameters, initial operation durations corresponding to the plurality of preset operation conditions respectively;

and the sixth determining unit is used for determining the total operation time length of the ball screw pair to be tested under the preset operation working conditions based on the plurality of initial operation time lengths.

In the embodiment of the present application, the method further includes:

the information acquisition module is used for acquiring at least one piece of information of friction torque information, stroke error information, noise information and vibration information of the ball screw pair to be tested in the running process in the process of controlling each ball screw pair to be tested corresponding to the actual sample number to test based on the at least one target integration condition;

and the reliability determining module is used for determining the reliability of the ball screw pair to be tested based on at least one of the friction torque information, the stroke error information, the noise information and the vibration information and preset calibration conditions corresponding to the friction torque information, the stroke error information, the noise information and the vibration information.

In the embodiment of the present application, the method further includes:

and the repeated execution module is used for sequentially repeating the confirmation steps of the reference working condition and the working condition to be converted to the determination step of the target running time under the condition that the sum of the target running time is greater than a preset test time threshold value until the sum of the target running time is less than or equal to the preset test time threshold value.

It should be noted that the device and method embodiments in the device embodiment are based on the same inventive concept.

The embodiment of the application provides a test control device of a ball screw pair, the device comprises a processor and a memory, at least one instruction or at least one program is stored in the memory, and the at least one instruction or the at least one program is loaded and executed by the processor to realize the test control method of the ball screw pair according to the method embodiment.

Further, fig. 7 is a schematic diagram of a hardware structure of an electronic device for implementing the test control method of the ball screw pair provided in the embodiment of the present application, where the electronic device may participate in a test control apparatus that constitutes or includes the ball screw pair provided in the embodiment of the present application. As shown in fig. 7, the electronic device 70 may include one or more processors (shown as 702a, 702b, … …, 702 n) which may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA, a memory 704 for storing data, and a transmission device 706 for communication functions. Besides, the method can also comprise the following steps: a display, an input/output interface (I/O interface), a Universal Serial Bus (USB) port (which may be included as one of the ports of the I/O interface), a network interface, a power source, and/or a camera. It will be understood by those skilled in the art that the structure shown in fig. 7 is only an illustration and is not intended to limit the structure of the electronic device. For example, electronic device 70 may also include more or fewer components than shown in FIG. 7, or have a different configuration than shown in FIG. 7.

It should be noted that the one or more processors and/or other test control circuitry of the ball screw assembly described above may be generally referred to herein as "test control circuitry of the ball screw assembly". The test control circuit of the ball screw pair can be wholly or partially embodied in software, hardware, firmware or any other combination. Further, the test control circuitry of the ballscrew pair may be a single, stand-alone processing module, or incorporated in whole or in part into any of the other components in the electronic device 70 (or mobile device). As referred to in the embodiments of the present application, the test control circuit of the ball screw assembly is controlled as a processor (e.g., selection of variable resistance termination paths connected to the interface).

The memory 704 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the test control method for the ball screw assembly described in the embodiments of the present application, and the processor executes various functional applications and test control for the ball screw assembly by running the software programs and modules stored in the memory 704, so as to implement the above-mentioned test control method for the ball screw assembly. The memory 704 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 704 may further include memory located remotely from the processor, which may be connected to the electronic device 70 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission means 706 is used for receiving or sending data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the electronic device 70. In one example, the transmission device 706 includes a network adapter (NIC) that can be connected to other network devices through a base station so as to communicate with the internet. In one embodiment, the transmission device 706 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.

The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with a user interface of the electronic device 70 (or mobile device).

Embodiments of the present application further provide a computer-readable storage medium, which may be disposed in an electronic device to store at least one instruction or at least one program for implementing a method for controlling testing of a ball screw assembly in the method embodiments, where the at least one instruction or the at least one program is loaded into and executed by the processor to implement the method for controlling testing of a ball screw assembly provided in the method embodiments.

Alternatively, in this embodiment, the storage medium may be located in at least one network server of a plurality of network servers of a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

It should be noted that: the sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

According to an aspect of the application, a computer program product or computer program is provided, comprising computer instructions, the computer instructions being stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the method provided in the various alternative implementations described above.

The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus and electronic device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A test control method of a ball screw pair is characterized by comprising the following steps:

acquiring a plurality of preset operation working conditions of a ball screw pair to be detected, the total operation time of the ball screw pair to be detected under the plurality of preset operation working conditions, preset acceleration configuration information, preset reliability information and preset reliability information; the preset reliability information is used for representing the possibility that the ball screw pair to be tested can be detected to be invalid in the testing process, and the preset reliability information is used for representing the possibility that the ball screw pair to be tested is not invalid in the testing process;

under the condition that the total operation duration is greater than a preset test duration threshold value, determining at least one reference working condition and at least one to-be-converted working condition corresponding to the at least one reference working condition from the plurality of preset operation working conditions, wherein the load information of each reference working condition is greater than or equal to the load information of the at least one to-be-converted working condition corresponding to the reference working condition;

determining a target operation time length corresponding to at least one integrated operation time length and a target operation working condition corresponding to at least one target operation time length based on the preset reliability information, the actual sample number of the ball screw pair to be detected and at least one integrated operation time length;

2. The method for testing and controlling a ball screw pair according to claim 1, wherein the at least one reference condition comprises at least one target reference condition; the determining, based on the preset acceleration configuration information, the at least one reference working condition, and the at least one working condition to be converted, a target integration working condition corresponding to the at least one reference working condition, and an integration operation duration corresponding to the at least one target integration working condition, includes:

3. The method for testing and controlling the ball screw pair according to claim 2, wherein the determining the target integrated condition corresponding to the target reference condition and the integrated operation duration corresponding to the target integrated condition based on the preset acceleration configuration information, the first operation parameter, the first operation duration and the second operation parameter comprises:

4. The test control method of a ball screw pair according to claim 3, wherein the target conversion operation parameters include a target rotation speed, a target axial load, a target movement stroke, and a target frequency; the performing accelerated conversion processing on the second operation parameter based on the first operation parameter and the preset accelerated configuration information to obtain a target conversion operation parameter includes:

5. The method for controlling testing of a ball screw assembly according to claim 1, wherein the determining a target operation duration corresponding to each of at least one integrated operation duration based on the preset reliability information, the actual number of samples of the ball screw assembly to be tested, and at least one integrated operation duration comprises:

6. The method for testing and controlling the ball screw pair according to claim 1, wherein the step of obtaining the total running time of the ball screw pair to be tested under the preset running conditions comprises the following steps:

7. The method for testing and controlling a ball screw assembly according to claim 1, further comprising:

8. The method for testing and controlling a ball screw assembly according to claim 1, further comprising:

9. A test control device of a ball screw pair is characterized by comprising:

the third determining module is used for determining a target operation time length corresponding to at least one integrated operation time length and a target operation working condition corresponding to at least one target operation time length based on the preset reliability information, the actual sample number of the ball screw pair to be detected and at least one integrated operation time length;

10. A test control apparatus for a ball screw pair, the apparatus comprising a processor and a memory, the memory having at least one instruction or at least one program stored therein, the at least one instruction or the at least one program being loaded and executed by the processor to implement the test control method for a ball screw pair according to any one of claims 1 to 8.

11. A computer-readable storage medium, wherein at least one instruction or at least one program is stored in the storage medium, and the at least one instruction or the at least one program is loaded by a processor and executes the method for controlling the testing of the ball screw pair according to any one of claims 1 to 8.