Long hole machining method for non-metallic material

Abstract

The invention relates to the technical field of non-metallic material vibration signal processing, in particular to a long hole machining method for a non-metallic material. A clamp vibration signal and a drill bit vibration signal are obtained; segmenting the clamp vibration signal and the drill bit vibration signal; according to the distribution and the number of noise signals in the signals at any stage, obtaining a noise change coefficient of the signals at the stage; obtaining a signal change coefficient according to the periodic characteristic of the vibration signal in the signal at any stage and the noise change coefficient; and according to the size of the signal change coefficient in the reference stage signal, the long hole machining process of the non-metallic material is intervened. According to the method, vibration abnormity possibly occurring when long hole machining is carried out on the non-metal material is clearly detected, so that damage to the non-metal material in the long hole machining process due to the fact that devices such as a machining machine tool or a machining drill bit have problems is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of non-metallic material vibration signal processing, and in particular to a method for processing a long hole of a non-metallic material. Background Art

[0002] Long hole processing technology for non-metallic materials is constantly developing in modern industry, covering a variety of advanced technologies such as high-speed processing, precision processing, laser processing, ultrasonic processing, CNC processing and multi-axis processing. The application of these technologies has significantly improved the accuracy, efficiency and complexity of long hole processing. Due to the long overhang of the drill bit during long hole processing, it is easy to cause vibration, which may not only lead to a decrease in processing accuracy, but also damage non-metallic materials, reduce tool life, and increase production costs. Therefore, it is particularly important to monitor and control the vibration during long hole processing. By monitoring vibration data in real time, problems in the processing process can be discovered and solved in time, processing parameters can be optimized, material damage can be reduced, tool use efficiency can be improved, product quality can be ensured, and overall production efficiency and economic benefits can be improved. In addition, vibration monitoring can also help implement predictive maintenance and reduce unexpected downtime, which is of great significance to the continuous advancement of non-metallic material long hole processing technology and the expansion of industrial applications.

[0003] In the long hole processing method for non-metallic materials, due to the long length of the hole, the overhang of the drill bit during processing and the vibration caused by it, abnormal vibration may occur, causing problems with the processing machine tool or processing drill bit and other devices, thereby causing damage to the non-metallic material during the long hole processing. Summary of the invention

[0004] In order to solve the technical problem that due to the long length of the hole, the overhang of the drill bit during processing and the vibration caused by it, abnormal vibration may occur, causing problems with the processing machine tool or the processing drill bit and other devices, and then causing damage to the non-metallic material during the long hole processing, the purpose of the present invention is to provide a long hole processing method for non-metallic materials, and the technical scheme adopted is as follows:

[0005] A method for processing a long hole of a non-metallic material, the method comprising:

[0006] Obtain the vibration signal of the fixture and the drill bit for long hole processing of non-metallic materials;

[0007] According to the vibration characteristics of the fixture and the drill bit when processing long holes in non-metallic materials, the fixture vibration signal and the drill bit vibration signal are segmented to obtain all stage signals; any one stage signal is selected as the reference stage signal; according to the distribution and number of noise signals in the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the noise variation coefficient of the reference stage signal is obtained; according to the periodic distribution characteristics and noise variation coefficient of the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the signal variation coefficient of the reference stage signal is obtained;

[0008] According to the signal variation coefficient in the reference phase signal, the long hole machining process of the non-metallic material is intervened.

[0009] Furthermore, the method for acquiring the phase signal includes:

[0010] All vibration signals corresponding to the period when the clamp and drill bit vibrate most violently are taken as hole entrance stage signals;

[0011] All vibration signals corresponding to the period when the vibration of the fixture and the drill bit is stable are regarded as the hole intermediate stage signals;

[0012] All vibration signals except the hole entrance stage signal and the hole middle stage signal are taken as the hole exit stage signal;

[0013] The hole entrance phase signal, the hole middle phase signal and the hole exit phase signal are used as phase signals.

[0014] Furthermore, the method for obtaining the noise variation coefficient includes:

[0015] In the reference phase signal, according to the time points of each two adjacent noise signals in the fixture vibration signal and the drill bit vibration signal, the time interval between each two adjacent noise signals in the fixture vibration signal and the drill bit vibration signal is obtained;

[0016] The noise variation coefficient is obtained according to the noise variation coefficient calculation formula, and the noise variation coefficient calculation formula is as follows:

[0017]

[0018] In the formula, C 1 represents the noise variation coefficient in the reference phase signal; N S1 Represents the number of noise signals of the fixture vibration signal in the reference phase signal; N S2 The amount of noise signal representing the drill bit vibration signal in the reference phase signal; Indicates the nth value in the fixture vibration signal in the reference phase signal S1 The noise signal and the nth S1-1 The time interval between noise signals; Indicates the nth bit vibration signal in the reference phase signal S2 The noise signal and the nth S2-1 The time interval between the noise signals; F S1 represents the frequency of each noise signal in the fixture vibration signal in the reference phase signal; F S2 represents the frequency of each noise signal in the drill bit vibration signal in the reference phase signal; exp( ) represents an exponential function with a natural constant as the base; || represents the absolute value function; σ( ) represents the standard deviation function.

[0019] Furthermore, the method for obtaining the signal variation coefficient includes:

[0020] In the fixture vibration signal and the drill bit vibration signal in the reference phase signal, according to the frequency difference between each vibration signal and two adjacent vibration signals on both sides of each vibration signal, all the frequency maximum value signals and the frequency minimum value signals in the reference phase signal are obtained;

[0021] In the fixture vibration signal and the drill bit vibration signal in the reference phase signal, according to the distribution characteristics of the frequency maximum value signal and the frequency minimum value signal, the fixture vibration stability coefficient and the drill bit vibration stability coefficient in the reference phase signal are obtained;

[0022] The signal variation coefficient is obtained according to the signal variation coefficient calculation formula, and the signal variation coefficient calculation formula is as follows:

[0023]

[0024] In the formula, C 2 represents the signal variation coefficient in the reference phase signal; C 1 represents the noise variation coefficient in the reference phase signal; Q S1 represents the fixture vibration stability factor in the reference phase signal; Q S2 It represents the vibration stability coefficient of the drill bit in the reference phase signal; Max() represents the maximum value function; exp() represents the exponential function with the natural constant as the base.

[0025] Furthermore, the method for obtaining all frequency maximum value signals and frequency minimum value signals includes:

[0026] In the reference phase signal, one of the fixture vibration signal and the drill bit vibration signal is selected as a reference vibration signal, a frequency difference between a vibration signal after the reference vibration signal and the reference vibration signal is used as a first frequency difference, and a frequency difference between the reference vibration signal and a vibration signal before the reference vibration signal is used as a second frequency difference;

[0027] When the first frequency difference is less than 0 and the second frequency difference is greater than 0, the reference vibration signal is a frequency maximum value signal;

[0028] When the first frequency difference is greater than 0 and the second frequency difference is less than 0, the reference vibration signal is a frequency minimum signal;

[0029] All vibration signals are traversed to obtain all frequency maximum value signals and frequency minimum value signals in the fixture vibration signal or the drill bit vibration signal in the reference phase signal.

[0030] Furthermore, the method for obtaining the fixture vibration stability coefficient and the drill bit vibration stability coefficient in the reference phase signal includes:

[0031] The fixture vibration stability coefficient is obtained according to the fixture vibration stability coefficient calculation formula, and the fixture vibration stability coefficient calculation formula is as follows

[0032]

[0033] In the formula, Q S1 represents the fixture vibration stability factor in the reference phase signal; F r represents the frequency of the rth frequency maximum signal in all fixture vibration signals in the reference phase signal; L R represents the time interval between the Rth frequency maximum signal and the R-1th frequency maximum signal in all fixture vibration signals in the reference phase signal; F r′ represents the frequency of the r′th frequency minimum signal in all fixture vibration signals in the reference phase signal; L R′ It represents the time interval between the R′th frequency maximum signal and the R′-1th frequency maximum signal in all the fixture vibration signals in the reference phase signal; σ() represents the standard deviation function; exp() represents the exponential function with a natural constant as the base; norm() represents the normalization function.

[0034] The calculation process of the drill bit vibration stability coefficient is the same as the calculation process of the fixture vibration stability coefficient.

[0035] Furthermore, according to the signal variation coefficient of the reference stage signal, the long hole processing process of the non-metallic material is intervened, including:

[0036] The time point when the signal variation coefficient is greater than a preset first threshold is taken as an unstable time point. When the unstable time points exceed a preset first number, it is considered that the long hole processing process shows an unstable trend, and the long hole processing process of the non-metallic material is intervened.

[0037] A system for processing long holes in non-metallic materials, the system comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for processing long holes in non-metallic materials when executing the computer program.

[0038] A medium for processing long holes in non-metallic materials, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of a method for processing long holes in non-metallic materials as described in any one of claims 1 to 7 are implemented.

[0039] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the long hole processing method of non-metallic materials as described above are implemented.

[0040] The present invention has the following beneficial effects:

[0041] The present invention obtains a fixture vibration signal and a drill bit vibration signal for long hole processing of non-metallic materials, so as to analyze vibration anomalies in the subsequent long hole processing process; since the cutting characteristics of the hole entrance stage, the hole middle stage and the hole exit stage in the long hole processing process are different, the vibration signals generated by the drill bit and the fixture will also be different, so all stage signals are obtained; since when the fixture or the drill bit fails, the timing points of the noise signals of the fixture vibration signal and the drill bit vibration signal become dissimilar, so according to the distribution of noise signals and the number of noise signals in the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the noise variation coefficient of the reference stage signal is obtained; since the vibration trends between the fixture vibration signal and the drill bit vibration signal are similar, if the fixture or the drill bit has problems during processing, the stability of the vibration signal may be destroyed, so according to the periodic distribution characteristics and the noise variation coefficient of the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the signal variation coefficient of the reference stage signal is obtained; according to the size of the signal variation coefficient in the reference stage signal, the long hole processing process of the non-metallic material is intervened. The present invention can accurately detect abnormal vibration that may occur when long holes are processed in non-metallic materials, thereby avoiding damage to the non-metallic materials during the long hole processing due to problems with processing machine tools or processing drills and other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A flow chart of a method for processing long holes in non-metallic materials provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the long hole processing method of non-metallic materials proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0045] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0046] The specific scheme of the long hole processing method of non-metallic material provided by the present invention is described in detail below with reference to the accompanying drawings.

[0047] See also Figure 1 , which shows a method for processing a long hole of a non-metallic material provided by an embodiment of the present invention, the method comprising:

[0048] Step S1: Obtaining a vibration signal of a fixture and a vibration signal of a drill bit for processing a long hole in a non-metallic material.

[0049] The embodiment of the present invention is mainly used in the abnormal vibration monitoring scenario when long hole processing is performed on non-metallic materials. During the long hole processing, the target position of the non-metallic material needs to be cut by a drill bit, and the fixture is the device that is closest to and most directly in contact with the material except the drill bit. Therefore, using the fixture and the drill bit as the collection points of local vibration signals can accurately reflect the actual situation in the processing process. Therefore, in the embodiment of the present invention, the vibration signal of the fixture and the vibration signal of the drill bit for long hole processing of non-metallic materials are obtained to analyze the vibration abnormality in the subsequent long hole processing process.

[0050] In one embodiment of the present invention, a sensor for collecting vibration signals is installed at designated positions of the drill bit and the fixture for collection, wherein the designated positions can be set by the implementer and are not limited here. During collection, the sensors on the drill bit and the fixture use the same clock source to ensure the consistency of the timestamp, and an accurate timestamp is added to the collected data so that the data can be aligned in the post-processing stage; the collected drill bit vibration signal and the fixture vibration signal are stored, and the collected vibration signal is stored in json format during storage, wherein the key in the json format is the timestamp mentioned above, and the value is the signal frequency corresponding to the timestamp, in Hz, that is, each vibration signal is expressed in the form of key: value. It should be noted that in other embodiments of the present invention, the expression form of the vibration signal can be set by oneself and is not limited here.

[0051] Step S2: According to the vibration characteristics of the fixture and the drill bit when processing long holes in non-metallic materials, the fixture vibration signal and the drill bit vibration signal are segmented to obtain all stage signals; any stage signal is selected as the reference stage signal; according to the noise signal distribution and the number of noise signals in the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the noise variation coefficient of the reference stage signal is obtained; according to the periodic distribution characteristics and the noise variation coefficient of the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the signal variation coefficient of the reference stage signal is obtained.

[0052] In a process of processing a long hole on a non-metallic material, the process of generating a target hole can be divided into a hole entrance stage, a hole middle stage and a hole exit stage, wherein the hole entrance stage includes the stage from when the drill starts to enter the non-metallic material to when it completely enters the non-metallic material, the hole middle stage includes the stage from when the drill completely enters the non-metallic material and cuts the non-metallic material, and the hole exit stage includes the stage from when the drill completes the long hole processing and exits the material. Due to the different cutting characteristics of the hole entrance stage, the hole middle stage and the hole exit stage during the long hole processing, the vibration signals generated by the drill bit and the fixture will also be different. At the hole entrance stage, when the drill bit starts to cut in, there may be a large initial impact and vibration; at the hole middle stage, the cutting load is relatively stable and the vibration will be more stable; at the hole exit stage, the resistance of the non-metallic material itself to the drill bit changes, and the drill bit may cause vibration changes again when it exits, so in the embodiment of the present invention, the fixture vibration signal and the drill bit vibration signal are segmented to obtain all stage signals.

[0053] Preferably, in one embodiment of the present invention, the method for acquiring the phase signal includes:

[0054] Since the drill bit starts to cut in at the hole entrance stage, there may be a large initial impact and vibration, and all vibration signals corresponding to the period when the fixture and the drill bit vibrate most violently are taken as hole entrance stage signals;

[0055] Since the cutting load is relatively stable and the vibration is more stable during the middle stage of the hole, all vibration signals corresponding to the period when the vibration of the fixture and the drill bit is stable are taken as the signals of the middle stage of the hole;

[0056] All vibration signals except the hole entrance stage signal and the hole middle stage signal are taken as the hole exit stage signal;

[0057] The hole entrance phase signal, the hole middle phase signal and the hole exit phase signal are used as phase signals.

[0058] In one embodiment of the present invention, the distance the drill moves per minute is used to obtain the time lengths of the hole entrance stage, the hole middle stage and the hole exit stage. The specific process is a technical means well known to those skilled in the art and will not be elaborated here.

[0059] Since the fixture and the drill bit are operated under the same environmental conditions, the vibration characteristics of the normal fixture vibration signal and the drill bit vibration signal are relatively similar, but the fixture vibration signal and the drill bit vibration signal include less noise signals, and the noise signals have strong randomness. Since environmental factors have an important influence on the noise characteristics of the vibration signal, the same environmental characteristics will cause the noise signals in the vibration signals collected on the fixture and the drill bit to appear at similar time positions, but when the fixture or the drill bit fails, the timing points of the noise signals of the fixture vibration signal and the drill bit vibration signal become disjoint, so whether the fixture and the drill bit have failed can be analyzed by the noise signal distribution of the fixture vibration signal and the drill bit vibration signal. In one embodiment of the present invention, the noise variation coefficient of the reference stage signal is obtained according to the noise signal distribution and the number of noise signals in the fixture vibration signal and the drill bit vibration signal in the reference stage signal.

[0060] Preferably, in one embodiment of the present invention, the method for obtaining the noise variation coefficient includes:

[0061] In the reference phase signal, the time interval between each two adjacent noise signals in the fixture vibration signal and the drill bit vibration signal is obtained according to the time points at which each two adjacent noise signals in the fixture vibration signal and the drill bit vibration signal are located.

[0062] The noise variation coefficient is obtained according to the noise variation coefficient calculation formula. The noise variation coefficient calculation formula is as follows:

[0063]

[0064] In the formula, C 1 represents the noise variation coefficient in the reference phase signal; N S1 Represents the number of noise signals of the fixture vibration signal in the reference phase signal; N S2The amount of noise signal representing the drill bit vibration signal in the reference phase signal; Indicates the nth value in the fixture vibration signal in the reference phase signal S1 The noise signal and the nth S1-1 The time interval between noise signals; Indicates the nth bit vibration signal in the reference phase signal S2 The noise signal and the nth S2-1 The time interval between the noise signals; F S1 represents the frequency of each noise signal in the fixture vibration signal in the reference phase signal; F S2 represents the frequency of each noise signal in the drill vibration signal in the reference phase signal; exp() represents an exponential function with a natural constant as the base; || represents the absolute value function; σ() represents the standard deviation function.

[0065] In the noise variation coefficient calculation formula, the difference between the noise signal quantity of the fixture vibration signal and the noise signal quantity of the drill bit vibration signal|N S1 -N S2 | is larger, indicating that the noise difference between the fixture vibration signal and the drill bit vibration signal is greater, indicating that the noise variation coefficient is greater; within the fixture vibration signal or the drill bit vibration signal, the standard deviation of the time interval between each adjacent noise signal and The greater the difference between and The larger the value is, the greater the difference between the noise signal distribution in the fixture vibration signal and the noise signal distribution in the drill bit vibration signal is, and the greater the noise change between the two vibration signals is.

[0066] Then, the normal vibration signal in the fixture vibration signal and the drill bit vibration signal is analyzed. Since part of the signal in the fixture vibration signal and the drill bit vibration signal is a noise signal, the normal vibration signal is missing at some timing points during the analysis, which causes the signal length of the fixture vibration signal and the drill bit vibration signal to not match during the analysis. For the normal vibration signal missing in the timing, in one embodiment of the present invention, the average of the frequency values ​​of the vibration signals before and after the missing part is taken as the vibration signal at the missing part. It should be noted that in other embodiments of the present invention, the vibration signal at the missing part can be set by the implementer himself, and is not limited here.

[0067] In industrial scenarios, the drill vibration signal generated by the drill bit of a processing machine tool during operation can be regarded as a vibration signal with periodicity. Because the rotation and feed motion of the drill bit are uniform and repetitive, and the fixture connects the non-metallic material to be processed, the vibration trends between the fixture vibration signal and the drill bit vibration signal are similar. Therefore, when one section of the vibration signal itself tends to be a stable, periodic signal, the greater the confidence level of the signal itself, and when the stability of the vibration signal is destroyed, it means that there is a problem with the source of the signal at this time, that is, there is a problem with the fixture or the drill bit during processing. Therefore, in the embodiment of the present invention, the signal variation coefficient of the reference stage signal is obtained according to the periodic distribution characteristics and noise variation coefficient of the fixture vibration signal and the drill bit vibration signal in the reference stage signal.

[0068] Preferably, in one embodiment of the present invention, the method for obtaining the signal variation coefficient includes:

[0069] Among the fixture vibration signal or the drill bit vibration signal in the reference stage signal, any one vibration signal is selected as the reference vibration signal, and the frequency difference between the next vibration signal of the reference vibration signal and the reference vibration signal is taken as the first frequency difference, and the frequency difference between the reference vibration signal and the previous vibration signal of the reference vibration signal is taken as the second frequency difference; when the first frequency difference is less than 0 and the second frequency difference is greater than 0, the reference vibration signal is a frequency maximum signal; when the first frequency difference is greater than 0 and the second frequency difference is less than 0, the reference vibration signal is a frequency minimum signal.

[0070] In the fixture vibration signal and the drill bit vibration signal in the reference phase signal, according to the distribution characteristics of the frequency maximum signal and the frequency minimum signal, the fixture vibration stability coefficient and the drill bit vibration stability coefficient in the reference phase signal are obtained. In one embodiment of the present invention, the fixture vibration stability coefficient calculation formula is as follows

[0071]

[0072] In the formula, Q S1 represents the fixture vibration stability factor in the reference phase signal; F r represents the frequency of the rth frequency maximum signal in all fixture vibration signals in the reference phase signal; L R represents the time interval between the Rth frequency maximum signal and the R-1th frequency maximum signal in all fixture vibration signals in the reference phase signal; F r′ represents the frequency of the r′th frequency minimum signal in all fixture vibration signals in the reference phase signal; L R′It represents the time interval between the R′th frequency maximum signal and the R′-1th frequency maximum signal in all the fixture vibration signals in the reference phase signal; σ() represents the standard deviation function; exp() represents the exponential function with a natural constant as the base; norm() represents the normalization function.

[0073] In the calculation formula of the fixture vibration stability coefficient, the more stable the time interval of the vibration signal corresponding to the extreme frequency extreme point is, that is, σ(F r )+σ(L R ) and σ(F r′ )+σ(L R′ ) is smaller, indicating that the more stable the fixture vibration signal is, that is, the larger the fixture vibration stability coefficient in the reference stage signal is. Since the vibration trends between the fixture vibration signal and the drill bit vibration signal are similar, the calculation process of the drill bit vibration stability coefficient is the same as that of the fixture vibration stability coefficient.

[0074] The signal variation coefficient is obtained according to the signal variation coefficient calculation formula. The signal variation coefficient calculation formula is as follows:

[0075]

[0076] In the formula, C 2 represents the signal variation coefficient in the reference phase signal; C 1 represents the noise variation coefficient in the reference phase signal; Q S1 represents the fixture vibration stability factor in the reference phase signal; Q S2 It represents the vibration stability coefficient of the drill bit in the reference phase signal; Max() represents the maximum value function; exp() represents the exponential function with the natural constant as the base.

[0077] In the signal variation coefficient calculation formula, Max(Q s1 , Q s1 ) indicates the one with the greatest stability between the fixture vibration signal and the drill bit vibration signal. The larger the value of this part, the more stable the vibration signal with the greatest stability in the reference stage signal tends to be. At this time, if the difference in the stability coefficients between the fixture vibration signal and the drill bit vibration signal in this stage is greater, it means that the other vibration signal is unstable compared with the vibration signal with greater stability. At this time, Max(Q s1 , Q s1 )+|Q s1 -Q s2}, the larger the value, the corresponding signal variation coefficient C 2 It should also tend to become larger. The logic here corresponds to the formula Combined with the C obtained above 1 ,when The value of the part is related to C1 When the values ​​tend to increase, it means that the fluctuation of the vibration signal is more obvious, so the signal variation coefficient should be larger.

[0078] At this point, the signal variation coefficient of the signal in each stage is obtained.

[0079] Step S3: Intervene in the long hole processing process of the non-metallic material according to the signal variation coefficient in the reference phase signal.

[0080] Since the larger the signal variation coefficient is, the more unstable the signal is at the corresponding maximum moment during calculation, it is mentioned above that when the collected vibration signal can reflect that the device has an unstable trend during the long hole processing, timely intervention is required to avoid damage to non-metallic materials. Therefore, it is necessary to determine to what extent the signal variation coefficient changes before it is considered that the device has an unstable trend during the processing.

[0081] Preferably, in one embodiment of the present invention, the time point when the signal change coefficient is greater than a preset first threshold is taken as an unstable time point. When the unstable time point exceeds a preset first number, it is considered that the long hole processing process shows an unstable trend, and the long hole processing process of the non-metallic material is intervened.

[0082] In one embodiment of the present invention, the preset first threshold is set to 0.8, and the preset first number is set to 10. It should be noted that in other embodiments of the present invention, the preset first threshold and the preset first number can be set arbitrarily, and are not limited here.

[0083] Once the coefficient of change of the vibration signal exceeds the preset safety threshold, consider starting the intervention procedure immediately. For safety reasons, first perform an emergency stop operation to stop all mechanical movements to prevent further damage to non-metallic materials. Under the premise of ensuring personnel safety, conduct a preliminary safety check of the processing equipment, including but not limited to checking the cooling system, lubrication system, tool clamping device, etc. After confirming that all problems have been resolved and the equipment is in a safe state, restart the processing process.

[0084] In summary, the vibration signal of the fixture and the drill bit when processing long holes in non-metallic materials are obtained; according to the vibration characteristics of the fixture and the drill bit when processing long holes in non-metallic materials, the fixture vibration signal and the drill bit vibration signal are segmented to obtain all stage signals; any one stage signal is selected as the reference stage signal; according to the distribution of noise signals and the number of noise signals in the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the noise variation coefficient of the reference stage signal is obtained; according to the periodic distribution characteristics and the noise variation coefficient of the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the signal variation coefficient of the reference stage signal is obtained; according to the size of the signal variation coefficient in the reference stage signal, the long hole processing process of the non-metallic material is intervened.

[0085] An embodiment of the present invention provides a long hole processing system for non-metallic materials, the system includes a memory, a processor and a computer program, wherein the memory is used to store the corresponding computer program, the processor is used to run the corresponding computer program, and when the computer program runs in the processor, it can implement the method described in steps S1-S3.

[0086] The third purpose of an embodiment of the present invention is to provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned long hole processing method for non-metallic materials when executing the computer program.

[0087] The fourth purpose of the embodiment of the present invention is to provide a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the long hole processing method of the above-mentioned non-metallic material are implemented.

[0088] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0089] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A method for processing a long hole of a non-metallic material, characterized in that: The method comprises: Obtain the vibration signal of the fixture and the drill bit for long hole processing of non-metallic materials; According to the vibration characteristics of the fixture and the drill bit when processing long holes in non-metallic materials, the fixture vibration signal and the drill bit vibration signal are segmented to obtain all stage signals; any one stage signal is selected as the reference stage signal; according to the distribution and number of noise signals in the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the noise variation coefficient of the reference stage signal is obtained; according to the periodic distribution characteristics and noise variation coefficient of the fixture vibration signal and the drill bit vibration signal in the reference stage signal, the signal variation coefficient of the reference stage signal is obtained; According to the signal variation coefficient in the reference phase signal, the long hole machining process of the non-metallic material is intervened.

2. A method for processing a long hole of a non-metallic material according to claim 1, characterized in that: The method for obtaining the phase signal includes: All vibration signals corresponding to the period when the clamp and drill bit vibrate most violently are taken as hole entrance stage signals; All vibration signals corresponding to the period when the vibration of the fixture and the drill bit is stable are regarded as the hole intermediate stage signals; All vibration signals except the hole entrance stage signal and the hole middle stage signal are taken as the hole exit stage signal; The hole entrance phase signal, the hole middle phase signal and the hole exit phase signal are used as phase signals.

3. A method for processing a long hole of a non-metallic material according to claim 1, characterized in that: The method for obtaining the noise variation coefficient includes: In the reference phase signal, according to the time points of each two adjacent noise signals in the fixture vibration signal and the drill bit vibration signal, the time interval between each two adjacent noise signals in the fixture vibration signal and the drill bit vibration signal is obtained; The noise variation coefficient is obtained according to the noise variation coefficient calculation formula, and the noise variation coefficient calculation formula is as follows: Where C1 represents the noise variation coefficient in the reference phase signal; N S1 Represents the number of noise signals of the fixture vibration signal in the reference phase signal; N S2 The amount of noise signal representing the drill bit vibration signal in the reference phase signal; Indicates the nth value in the fixture vibration signal in the reference phase signal S1 The noise signal and the nth S1-1 The time interval between noise signals; Indicates the nth bit vibration signal in the reference phase signal S2 The noise signal and the nth S2-1 The time interval between noise signals; F S1 represents the frequency of each noise signal in the fixture vibration signal in the reference phase signal; F S2 represents the frequency of each noise signal in the drill bit vibration signal in the reference phase signal; exp() represents an exponential function with a natural constant as the base; || represents the absolute value function; σ( ) represents the standard deviation function.

4. A method for processing a long hole in a non-metallic material according to claim 1, characterized in that: The method for obtaining the signal variation coefficient includes: In the fixture vibration signal and the drill bit vibration signal in the reference phase signal, according to the frequency difference between each vibration signal and two adjacent vibration signals on both sides of each vibration signal, all the frequency maximum value signals and the frequency minimum value signals in the reference phase signal are obtained; In the fixture vibration signal and the drill bit vibration signal in the reference phase signal, according to the distribution characteristics of the frequency maximum value signal and the frequency minimum value signal, the fixture vibration stability coefficient and the drill bit vibration stability coefficient in the reference phase signal are obtained; The signal variation coefficient is obtained according to the signal variation coefficient calculation formula, and the signal variation coefficient calculation formula is as follows: Where C2 represents the signal variation coefficient in the reference phase signal; C1 represents the noise variation coefficient in the reference phase signal; Q S1 represents the fixture vibration stability factor in the reference phase signal; Q S2 represents the drill vibration stability coefficient in the reference phase signal; Max( ) represents the maximum value function; exp( ) represents the exponential function with a natural constant as the base.

5. A method for processing a long hole in a non-metallic material according to claim 4, characterized in that: The method for obtaining all frequency maximum value signals and frequency minimum value signals includes: In the reference phase signal, one of the fixture vibration signal and the drill bit vibration signal is selected as a reference vibration signal, a frequency difference between a vibration signal after the reference vibration signal and the reference vibration signal is used as a first frequency difference, and a frequency difference between the reference vibration signal and a vibration signal before the reference vibration signal is used as a second frequency difference; When the first frequency difference is less than 0 and the second frequency difference is greater than 0, the reference vibration signal is a frequency maximum value signal; When the first frequency difference is greater than 0 and the second frequency difference is less than 0, the reference vibration signal is a frequency minimum signal; All vibration signals are traversed to obtain all frequency maximum value signals and frequency minimum value signals in the fixture vibration signal or the drill bit vibration signal in the reference phase signal.

6. A method for processing a long hole in a non-metallic material according to claim 4, characterized in that: The method for obtaining the fixture vibration stability coefficient and the drill bit vibration stability coefficient in the reference phase signal includes: The fixture vibration stability coefficient is obtained according to the fixture vibration stability coefficient calculation formula, and the fixture vibration stability coefficient calculation formula is as follows In the formula, Q S1 represents the fixture vibration stability factor in the reference phase signal; F r represents the frequency of the rth frequency maximum signal in all fixture vibration signals in the reference phase signal; L R Represents the time interval between the Rth frequency maximum value signal and the R-1th frequency maximum value signal in all fixture vibration signals in the reference phase signal; F r′ represents the frequency of the r′th frequency minimum signal in all fixture vibration signals in the reference phase signal; L R′ Indicates the R′th frequency maximum signal in all fixture vibration signals in the reference phase signal and the R′-1 time interval of the frequency maximum signal; exp( ) represents an exponential function with a natural constant as the base; σ( ) represents the standard deviation function; norm( ) represents the normalization function. The calculation process of the drill bit vibration stability coefficient is the same as the calculation process of the fixture vibration stability coefficient.

7. A method for processing a long hole in a non-metallic material according to claim 1, characterized in that: According to the signal variation coefficient of the reference phase signal, the long hole processing process of non-metallic materials is intervened, including: The time point when the signal variation coefficient is greater than a preset first threshold is taken as an unstable time point. When the unstable time points exceed a preset first number, it is considered that the long hole processing process shows an unstable trend, and the long hole processing process of the non-metallic material is intervened.

8. A system for processing long holes of non-metallic materials, the system comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for processing long holes in non-metallic materials as described in any one of claims 1 to 7 are implemented.

9. A medium for processing long holes in non-metallic materials, wherein the computer-readable storage medium stores a computer program, characterized in that: When the computer program is executed by a processor, the steps of a method for processing long holes in non-metallic materials as described in any one of claims 1 to 7 are implemented.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for processing long holes in non-metallic materials as described in any one of claims 1 to 7 are implemented.

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