Method and device for accurately designing high-strength gear ultrasonic gear shaping device

Abstract

The invention provides a precise design method and device for a high-strength gear ultrasonic gear shaping device, and relates to the field of machining. The method comprises the steps that under the condition that an ultrasonic gear shaping device is not started, initial gear shaping cutting force is obtained; initial ultrasonic power is determined according to the initial gear shaping cutting force; performing a gear shaping cutting force test based on the initial ultrasonic power to obtain a first gear shaping cutting force; first ultrasonic power is determined according to the first gear shaping cutting force; performing a gear shaping cutting force test based on the first ultrasonic power to obtain a second gear shaping cutting force; and the target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference value of the first gear shaping cutting force and the second gear shaping cutting force. By means of the method, the target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference value of the first gear shaping cutting force and the second gear shaping cutting force, matching of the ultrasonic power of the ultrasonic gear shaping device can be optimized, and efficient precision machining of the high-strength gear is achieved.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to a method and a device for accurately designing a high-strength gear ultrasonic gear shaping device. Background Art

[0002] Existing ultra-hard high-strength gears generally use the honing process, which has high cutting heat and significant cutting deformation, resulting in extremely low processing efficiency. After the ultrasonic gear shaping device is subjected to cutting force, the ultrasonic vibration amplitude of the ultrasonic gear shaping system will change, and the gear shaping cutter will produce cutting deformation, which will change the cutting process parameters and reduce the cutting performance. Although adding ultrasonic assistance during cutting reduces the cutting force and improves the processing performance, cutting deformation still exists, and the cutting force of ultra-hard high-strength gears is 2 to 4 times higher than that of conventional gears. The coupling of multiple factors such as cutting deformation, cutting process parameters and ultrasonic vibration parameters makes it difficult to accurately estimate the cutting process parameters, and it is impossible to use ultrasonic gear shaping devices to achieve precise processing of high-strength gears. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a method and device for accurately designing an ultrasonic gear shaping device for high-strength gears, so as to solve the problem in the prior art that it is impossible to use an ultrasonic gear shaping device to achieve accurate processing of high-strength gears.

[0004] In order to achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a method for accurately designing a high-strength gear ultrasonic gear shaping device, the method comprising:

[0005] When the ultrasonic gear shaping device is not turned on, the initial gear shaping cutting force is obtained;

[0006] Determine the initial ultrasonic power according to the initial gear shaping cutting force;

[0007] A gear cutting force test is performed based on the initial ultrasonic power to obtain a first gear cutting force;

[0008] determining a first ultrasonic power according to a first gear cutting force;

[0009] Performing a gear cutting force test based on the first ultrasonic power to obtain a second gear cutting force;

[0010] The target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference between the first gear shaping cutting force and the second gear shaping cutting force.

[0011] In the embodiment of the present application, the initial ultrasonic power is determined according to the initial gear cutting force, including:

[0012] Obtaining ultrasonic vibration amplitude, power frequency of ultrasonic gear shaping system and vibration time;

[0013] According to the ultrasonic vibration amplitude, the power frequency, the vibration time and the initial gear shaping cutting force, a first power required to generate the ultrasonic vibration amplitude, a second power required to overcome the cutting force, and a third power required for the ultrasonic gear shaping system to maintain stable vibration are determined;

[0014] The sum of the first power, the second power, and the third power is determined as the initial ultrasonic power.

[0015] In the embodiment of the present application, determining the first power includes:

[0016] Determine the vibration displacement, vibration velocity and vibration acceleration of the ultrasonic gear shaping system according to the ultrasonic vibration amplitude, power frequency and vibration time;

[0017] Determine the target excitation force according to vibration displacement, vibration velocity, vibration acceleration, modal mass, modal stiffness and modal damping;

[0018] The product of the target excitation force and the vibration velocity is determined as the first power.

[0019] In the embodiment of the present application, determining the second power includes:

[0020] The product of the initial gear cutting force and the vibration velocity is determined as the second power.

[0021] In the embodiment of the present application, the third power satisfies the formula:

[0022]

[0023] Where P is the third power, x v is the ultrasonic vibration amplitude, f v is the power frequency, is the modal damping.

[0024] In an embodiment of the present application, determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force includes:

[0025] determining a first absolute value of a difference between the first gear cutting force and the second gear cutting force;

[0026] When the first absolute value is less than or equal to the first preset value, determining the first ultrasonic power as the target ultrasonic power;

[0027] When the first absolute value is greater than the first preset value, determining the second ultrasonic power according to the second gear cutting force and the vibration speed;

[0028] Perform a gear cutting force test based on the second ultrasonic power to obtain a third gear cutting force;

[0029] The target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference between the second gear shaping cutting force and the third gear shaping cutting force.

[0030] In the embodiment of the present application, the target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference between the second gear shaping cutting force and the third gear shaping cutting force, including:

[0031] determining a second absolute value of a difference between the second gear cutting force and the third gear cutting force;

[0032] When the second absolute value is less than or equal to the second preset value, determining the second ultrasonic power as the target ultrasonic power;

[0033] When the second absolute value is greater than the second preset value, an average value of the second gear cutting force and the third gear cutting force is determined as a fourth gear cutting force;

[0034] The target ultrasonic power is determined according to the fourth gear cutting force and the vibration speed.

[0035] A second aspect of the present application provides a device for accurately designing a high-strength gear ultrasonic gear shaping device, the device comprising:

[0036] An initial gear shaping cutting force determination module is used to obtain the initial gear shaping cutting force when the ultrasonic gear shaping device is not turned on;

[0037] An initial ultrasonic power determination module, used to determine the initial ultrasonic power according to the initial gear shaping cutting force;

[0038] A first gear cutting force determination module, used for performing a gear cutting force test based on an initial ultrasonic power to obtain a first gear cutting force;

[0039] A first ultrasonic power determination module, used to determine a first ultrasonic power according to a first gear cutting force;

[0040] A second gear cutting force determination module, configured to perform a gear cutting force test based on the first ultrasonic power to obtain a second gear cutting force;

[0041] The target ultrasonic power determination module is used to determine the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force.

[0042] A third aspect of an embodiment of the present application provides an electronic device, including:

[0043] a memory configured to store instructions; and

[0044] The processor is configured to call instructions from the memory and implement the method for accurately designing the high-strength gear ultrasonic gear shaping device according to the above when executing the instructions.

[0045] A fourth aspect of an embodiment of the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the method for precise design of the high-strength gear ultrasonic gear shaping device described above.

[0046] The above technical solution, when the ultrasonic gear shaping device is not turned on, obtains the initial gear shaping cutting force; determines the initial ultrasonic power according to the initial gear shaping cutting force; performs a gear shaping cutting force test based on the initial ultrasonic power to obtain the first gear shaping cutting force; determines the first ultrasonic power according to the first gear shaping cutting force; performs a gear shaping cutting force test based on the first ultrasonic power to obtain the second gear shaping cutting force; and determines the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force. The above technical solution, by determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force, can optimize the matching of the ultrasonic power of the ultrasonic gear shaping device, and achieve efficient and precise machining of high-strength gears.

[0047] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0049] Figure 1 A flow chart schematically shows a method for accurately designing a high-strength gear ultrasonic gear shaping device according to an embodiment of the present application;

[0050] Figure 2 A schematic diagram of a structure of a device for precisely designing a high-strength gear ultrasonic gear shaping device according to an embodiment of the present application is shown;

[0051] Figure 3 A schematic diagram of a structure of an ultrasonic gear shaping device according to a specific embodiment of the present application is shown; Figure 4 The structure of an electronic device according to a specific embodiment of the present application is schematically shown.

[0052] Description of Reference Numerals

[0053] Initial gear cutting force determination module 210; initial ultrasonic power determination module 220; first gear cutting force determination module 230; first ultrasonic power determination module 240; second gear cutting force determination module 250; target ultrasonic power determination module 260;

[0054] Gear shaping cutter 301; ultrasonic auxiliary tool handle 302; wireless energy transmission ring 303; wireless energy receiving ring 304 on ultrasonic auxiliary tool handle; lower end clamping ring 305; circular ring member 306 of wireless energy transmission ring fixing device; upper end clamping ring 307; machine tool spindle 308; thin-walled bearing 309; L-shaped thin plate member 310 of wireless energy transmission ring fixing device;

[0055] Electronic device 4000; processor 4100; memory 4200. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0057] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0058] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0059] Figure 1 The following is a schematic diagram showing a flow chart of a method for accurately designing a high-strength gear ultrasonic gear shaping device according to an embodiment of the present application. Figure 1 As shown, the embodiment of the present application provides a method for accurately designing a high-strength gear ultrasonic gear shaping device, which is described by taking the method applied to a processor as an example. The method may include the following steps:

[0060] Step S100: obtaining an initial gear shaping cutting force when the ultrasonic gear shaping device is not turned on.

[0061] Step S200: determining the initial ultrasonic power according to the initial gear shaping cutting force.

[0062] Step S300: performing a gear cutting force test based on the initial ultrasonic power to obtain a first gear cutting force.

[0063] Step S400: determining a first ultrasonic power according to a first gear cutting force.

[0064] Step S500: performing a gear cutting force test based on the first ultrasonic power to obtain a second gear cutting force.

[0065] Step S600: determining a target ultrasonic power of the ultrasonic gear shaping device according to a difference between the first gear shaping cutting force and the second gear shaping cutting force.

[0066] In order to better describe the method for precise design of a high-strength gear ultrasonic gear cutting device in an embodiment of the present application, an ultrasonic gear cutting device is proposed in an embodiment of the present application, which includes an ultrasonic tool handle, an ultrasonic power supply, a bearing of a special structure, a support frame, a fixing device on the upper end of a wireless energy transmission ring, a wireless energy transmission ring, a piezoelectric sensor, and a control system. The initial gear cutting force refers to the gear cutting force obtained by measuring the gear cutting force test with a dynamometer under a common process parameter group when the ultrasonic device is not turned on. The initial ultrasonic power refers to the theoretical ultrasonic power calculated based on the initial gear cutting force. The first gear cutting force refers to the gear cutting force measured by the gear cutting force test based on the initial ultrasonic power. The first ultrasonic power refers to the ultrasonic power calculated based on the first gear cutting force. The target ultrasonic power refers to the ultrasonic power required for the ultrasonic gear cutting device.

[0067] Specifically, first, when the ultrasonic gear shaping device is not turned on, a gear shaping cutting force test is carried out under the commonly used process parameter group. The gear workpiece is fixed on a dynamometer, and the dynamometer is fixed on the workbench of the gear shaping machine. The initial gear shaping cutting force is obtained by measuring with the dynamometer. Then the initial gear shaping cutting force is substituted into the ultrasonic power calculation formula to calculate the initial ultrasonic power. Among them, the initial ultrasonic power is the sum of the power required to generate the ultrasonic vibration amplitude, the power required to overcome the cutting force, and the power required for the ultrasonic gear shaping system to maintain stable vibration. Since the cutting force of conventional gear shaping cutting is greater than the cutting force under ultrasonic assistance, the system input power is greater than the power required for actual ultrasonic gear shaping cutting. If the ultrasonic vibration power is too large, the ultrasonic vibration amplitude will be too large, resulting in tooth profile errors, so the ultrasonic input power needs to be corrected.

[0068] After the initial ultrasonic power is calculated, a gear cutting force test is performed based on the initial ultrasonic power, and the first gear cutting force can be obtained by measuring with a dynamometer. The first gear cutting force is substituted into the formula of the power required to overcome the cutting force for calculation, and the first ultrasonic power required by the ultrasonic gear cutting system can be obtained. Then the input power of the ultrasonic gear cutting system is adjusted from the initial ultrasonic power to the first ultrasonic power, and an ultrasonic gear cutting force test is performed, and the second gear cutting force is measured with a dynamometer. Finally, the target ultrasonic power of the ultrasonic gear cutting device is determined based on the difference between the first gear cutting force and the second gear cutting force. For example, when the absolute value of the difference between the first gear cutting force and the second gear cutting force is less than or equal to the first preset value, the first ultrasonic power is determined as the target ultrasonic power. When the absolute value of the difference between the first gear cutting force and the second gear cutting force is greater than the first preset value, the ultrasonic power is recalculated based on the second gear cutting force to determine the target ultrasonic power.

[0069] The above technical solution obtains the initial gear cutting force when the ultrasonic gear shaping device is not turned on; determines the initial ultrasonic power according to the initial gear shaping cutting force; performs a gear shaping cutting force test based on the initial ultrasonic power to obtain the first gear shaping cutting force; determines the first ultrasonic power according to the first gear shaping cutting force; performs a gear shaping cutting force test based on the first ultrasonic power to obtain the second gear shaping cutting force; and determines the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force. The above technical solution can optimize the matching of the ultrasonic power of the ultrasonic gear shaping device by determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force, thereby achieving efficient and precise machining of high-strength gears.

[0070] In one embodiment, determining the initial ultrasonic power according to the initial gear cutting force comprises:

[0071] Obtaining ultrasonic vibration amplitude, power frequency of ultrasonic gear shaping system and vibration time;

[0072] According to the ultrasonic vibration amplitude, the power frequency, the vibration time and the initial gear shaping cutting force, a first power required to generate the ultrasonic vibration amplitude, a second power required to overcome the cutting force, and a third power required for the ultrasonic gear shaping system to maintain stable vibration are determined;

[0073] The sum of the first power, the second power, and the third power is determined as the initial ultrasonic power.

[0074] Specifically, first obtain the ultrasonic vibration amplitude, power frequency and vibration time of the ultrasonic gear-splitting system from the initial time 0. The power required to generate the ultrasonic vibration amplitude is the first power, and the first power can be determined by multiplying the excitation force of the amplitude required for the ultrasonic gear-splitting system and the vibration speed of the ultrasonic gear-splitting system. The power required to overcome the cutting force is the second power, and the second power can be determined by multiplying the ultrasonic gear-splitting cutting force and the vibration speed of the ultrasonic gear-splitting system. The power required for the ultrasonic gear-splitting system to maintain stable vibration is the third power. The vibration speed can be determined based on the ultrasonic vibration amplitude x v , power frequency f v And the vibration time t is determined, the vibration speed satisfies The excitation force that generates the amplitude required for the ultrasonic gear shaping system can be based on the modal mass M, modal stiffness s, modal damping Vibration acceleration of ultrasonic gear shaping system Speed ​​of ultrasonic gear shaping system The excitation force required to generate the vibration amplitude of the ultrasonic gear shaping system satisfies The vibration displacement x of the ultrasonic gear shaping system satisfies Vibration acceleration of ultrasonic gear shaping system satisfy

[0075] In one embodiment, determining the first power includes:

[0076] Determine the vibration displacement, vibration velocity and vibration acceleration of the ultrasonic gear shaping system according to the ultrasonic vibration amplitude, power frequency and vibration time;

[0077] Determine the target excitation force according to vibration displacement, vibration velocity, vibration acceleration, modal mass, modal stiffness and modal damping;

[0078] The product of the target excitation force and the vibration velocity is determined as the first power.

[0079] Specifically, when determining the first power, firstly according to the ultrasonic vibration amplitude x v , power frequency f v And the vibration time t determines the vibration displacement x=x of the ultrasonic gear shaping system v sin(2πf v t), vibration speed And vibration acceleration Then according to the vibration displacement x, vibration speed Vibration acceleration Modal mass M, modal stiffness s, and modal damping Determine the motivational force of the goal According to the first power P 1The calculation formula The first power is calculated.

[0080] In one embodiment, determining the second power includes:

[0081] The product of the initial gear cutting force and the vibration velocity is determined as the second power.

[0082] Specifically, the second power satisfies F s is the gear cutting force. When calculating here, F s is the initial gear cutting force. s and vibration speed The product is determined as the second power P 2 .

[0083] In one embodiment, the third power satisfies the formula:

[0084]

[0085] Where P is the third power, x v is the ultrasonic vibration amplitude, f v is the power frequency, is the modal damping.

[0086] Specifically, the third power is the power required by the ultrasonic gear shaping system to maintain stable vibration. The third power P satisfies According to the ultrasonic vibration amplitude x v , power frequency f v , modal damping The third power P is calculated.

[0087] In one embodiment, the ultrasonic gear-cutting system needs to overcome the impedance of the ultrasonic gear-cutting system when it is not processed. When entering cutting, it is necessary to overcome the impedance and cutting force of the ultrasonic gear-cutting system. The damping of the gear-cutting cutting system, that is, the impedance, can be obtained through modal tests to obtain multiple orders of modal stiffness, modal damping, and modal frequency. The ultrasonic gear-cutting system requires axial vibration. According to the principle of mechanical vibration, the first-order vibration mode is usually pure axial vibration. In order to realize the axial vibration of the ultrasonic gear-cutting system, the first-order natural frequency of the ultrasonic vibration transformer needs to be an integer multiple of the strong vibration frequency of the piezoelectric actuator 20K. Substitute the first-order modal stiffness, natural frequency, and modal damping into The force impedance of the ultrasonic gear shaping system can be obtained The amplitude of .

[0088] In one embodiment, according to the existing commonly used gear shaping cutting process parameters, the stroke is set to N, the radial feed is set to r, the circumferential feed is set to l, and the gear shaping cutter stroke is K. Then the gear shaping cutting speed V is V=2kN. According to the existing critical cutting speed v of ultrasonic assisted cutting c =0.377h v f a In order to ensure that ultrasonic assistance can significantly reduce the cutting force of gear cutting and improve the processing performance, 70% of the critical cutting speed is set as the commonly used gear cutting speed, that is, v = 0.7v c The ultrasonic vibration frequency is the ultrasonic power source excitation frequency, that is, f a is 20000Hz, and the ultrasonic vibration amplitude is Then the vibration amplitude of the ultrasonic gear shaping system is x v =h v . Then the ultrasonic gear shaping system generates an ultrasonic vibration amplitude x under cutting load v The power of the stable vibration is Pc (ie, the initial ultrasonic power in this application).

[0089] In one embodiment, determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force comprises:

[0090] determining a first absolute value of a difference between the first gear cutting force and the second gear cutting force;

[0091] When the first absolute value is less than or equal to the first preset value, determining the first ultrasonic power as the target ultrasonic power;

[0092] When the first absolute value is greater than the first preset value, determining the second ultrasonic power according to the second gear cutting force and the vibration speed;

[0093] Perform a gear cutting force test based on the second ultrasonic power to obtain a third gear cutting force;

[0094] The target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference between the second gear shaping cutting force and the third gear shaping cutting force.

[0095] Specifically, when determining the target ultrasonic power, firstly according to the first gear cutting force F s1 and the second gear cutting force F s2 Determine the first absolute value of the difference between the first gear cutting force and the second gear cutting force. And judge the magnitude relationship between the first absolute value and the first preset value. The first preset value is a pre-set judgment threshold. Preferably, the first preset value can be 0.1F s1. The specific value of the first preset value can be adjusted according to the actual situation. When the first absolute value is less than or equal to the first preset value, the first ultrasonic power can be determined as the target ultrasonic power. When the first absolute value is greater than the first preset value, the second ultrasonic power is calculated according to the second gear cutting force. And a gear cutting force test is performed according to the second ultrasonic power to obtain a third gear cutting force. Finally, based on the above steps, the target ultrasonic power of the ultrasonic gear cutting device is determined according to the difference between the second gear cutting force and the third gear cutting force.

[0096] In one embodiment, determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the second gear shaping cutting force and the third gear shaping cutting force comprises:

[0097] determining a second absolute value of a difference between the second gear cutting force and the third gear cutting force;

[0098] When the second absolute value is less than or equal to the second preset value, determining the second ultrasonic power as the target ultrasonic power;

[0099] When the second absolute value is greater than the second preset value, an average value of the second gear cutting force and the third gear cutting force is determined as a fourth gear cutting force;

[0100] The target ultrasonic power is determined according to the fourth gear cutting force and the vibration speed.

[0101] Specifically, when determining the target ultrasonic power of the ultrasonic gear-shaping device according to the difference between the second gear-shaping cutting force and the third gear-shaping cutting force, first determine the second gear-shaping cutting force F s2 and the third gear cutting force F s3 The second absolute value of the difference between the absolute value and the second preset value is determined, and the magnitude relationship between the second absolute value and the second preset value is determined. The second preset value is a preset judgment threshold. Preferably, the second preset value can be 0.1F s2 . Neither the first preset value nor the second preset value is a fixed value and can be adjusted according to actual needs. When the second absolute value is less than or equal to the second preset value, the second ultrasonic power is determined as the target ultrasonic power; when the second absolute value is greater than the second preset value, the average of the second gear cutting force and the third gear cutting force is determined as the fourth gear cutting force. Finally, the fourth gear cutting force is substituted into the second power calculation formula, the fourth gear cutting force is multiplied by the vibration speed, and the obtained product is determined as the target ultrasonic power.

[0102] The above technical solution obtains the initial gear cutting force when the ultrasonic gear shaping device is not turned on; determines the initial ultrasonic power according to the initial gear shaping cutting force; performs a gear shaping cutting force test based on the initial ultrasonic power to obtain a first gear shaping cutting force; determines the first ultrasonic power according to the first gear shaping cutting force; performs a gear shaping cutting force test based on the first ultrasonic power to obtain a second gear shaping cutting force; and determines the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force. The above technical solution can optimize the matching of the ultrasonic power of the ultrasonic gear shaping device by determining the gear shaping cutting force and determining the target ultrasonic power of the ultrasonic gear shaping device according to the size relationship between the difference between the first gear shaping cutting force and the second gear shaping cutting force and a preset value, thereby achieving efficient and precise machining of high-strength gears.

[0103] Figure 2 The structure diagram of a device for accurately designing a high-strength gear ultrasonic gear shaping device according to an embodiment of the present application is schematically shown. Figure 2 As shown, the embodiment of the present application provides a device for accurately designing a high-strength gear ultrasonic gear shaping device, which may include:

[0104] An initial gear shaping cutting force determination module 210 is used to obtain an initial gear shaping cutting force when the ultrasonic gear shaping device is not turned on;

[0105] An initial ultrasonic power determination module 220, configured to determine an initial ultrasonic power according to an initial gear shaping cutting force;

[0106] A first gear cutting force determination module 230 is used to perform a gear cutting force test based on the initial ultrasonic power to obtain a first gear cutting force;

[0107] A first ultrasonic power determination module 240, configured to determine a first ultrasonic power according to a first gear cutting force;

[0108] A second gear cutting force determination module 250 is used to perform a gear cutting force test based on the first ultrasonic power to obtain a second gear cutting force;

[0109] The target ultrasonic power determination module 260 is used to determine the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force.

[0110] Specifically, when the ultrasonic gear shaping device is not turned on, the initial gear shaping cutting force determination module 210 carries out a gear shaping cutting force test under a common process parameter group. The gear workpiece is fixed on a dynamometer, and the dynamometer is fixed on a gear shaping machine tool workbench. The initial gear shaping cutting force is obtained by measuring the dynamometer. The initial ultrasonic power determination module 220 then calculates the initial ultrasonic power according to the ultrasonic power calculation formula. Among them, the initial ultrasonic power is the sum of the power required to generate the ultrasonic vibration amplitude, the power required to overcome the cutting force, and the power required for the ultrasonic gear shaping system to maintain stable vibration.

[0111] After calculating the initial ultrasonic power, the first gear cutting force determination module 230 performs a gear cutting force test based on the initial ultrasonic power, and measures the first gear cutting force through a dynamometer. The first ultrasonic power determination module 240 brings the first gear cutting force into the formula of the power required to overcome the cutting force for calculation, and can obtain the first ultrasonic power required by the ultrasonic gear cutting system. The second gear cutting force determination module 250 then adjusts the input power of the ultrasonic gear cutting system from the initial ultrasonic power to the first ultrasonic power, conducts an ultrasonic gear cutting force test, and measures the second gear cutting force through a dynamometer. Finally, the target ultrasonic power determination module 260 determines the target ultrasonic power of the ultrasonic gear cutting device based on the difference between the first gear cutting force and the second gear cutting force.

[0112] The above technical solution obtains the initial gear cutting force when the ultrasonic gear shaping device is not turned on; determines the initial ultrasonic power according to the initial gear shaping cutting force; performs a gear shaping cutting force test based on the initial ultrasonic power to obtain the first gear shaping cutting force; determines the first ultrasonic power according to the first gear shaping cutting force; performs a gear shaping cutting force test based on the first ultrasonic power to obtain the second gear shaping cutting force; and determines the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force. The above technical solution can optimize the matching of the ultrasonic power of the ultrasonic gear shaping device by determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force, thereby achieving efficient and precise machining of high-strength gears.

[0113] Figure 3 The structure diagram of an ultrasonic gear shaping device according to a specific embodiment of the present application is schematically shown. Figure 3 As shown, the ultrasonic gear shaping device includes a gear shaping cutter 301, an ultrasonic auxiliary tool handle 302, a wireless energy transmission ring 303, a wireless energy receiving ring 304 on the ultrasonic auxiliary tool handle, a lower end clamping ring 305, a circular ring member 306 of a wireless energy transmission ring fixing device, an upper end clamping ring 307, a machine tool spindle 308, a thin-walled bearing 309 and an L-shaped thin plate member 310 of a wireless energy transmission ring fixing device.

[0114] The ultrasonic gear shaping device is connected to the tool end of the machine tool, wherein the ultrasonic auxiliary tool holder of a special structure is connected to the machine tool spindle interface, and the tool holder interface is matched and connected to the machine tool spindle interface. The bearing of the special structure is a thin-walled bearing, and the inner diameter is consistent with the machine tool spindle. The position of the thin-walled bearing on the spindle is fixed by a clamping ring. The outer protective sleeve of the thin-walled bearing and the bearing can slide relative to each other during rotation. The bearing of this special structure is light in weight, which avoids the inertia of the bearing when it moves up and down with the general machine tool spindle to reduce the movement accuracy of the machine tool, improves the reliability and position accuracy of the thin-walled bearing fixed to the bearing, and avoids the clamping ring driving the outer diameter of the bearing to rotate when the spindle moves, so as to accurately achieve that the outer diameter of the bearing and its related connecting parts do not rotate. The clamping ring is a fractured circular ring, and the position of the clamping ring on the spindle is fixed by tightening bolts.

[0115] The wireless energy transmission ring is used to transmit the energy of the ultrasonic power supply, and it is connected to the ultrasonic power supply. The wireless energy transmission ring is used to realize the wireless connection between the energy input end and the receiving end, avoiding the inconvenience caused by the relative rotation between the input end and the receiving end. If the input end does not rotate, the receiving end needs to rotate. The wireless energy transmission ring fixing device is a circular ring and an L-shaped thin plate. The thickness of the thin plate is about 5mm, both of which are made of aluminum alloy to reduce the weight. The circular ring of the wireless energy transmission ring fixing device is clamped on the outer diameter of the thin-walled bearing by bolts, and the circular ring and the L-shaped thin plate are connected by countersunk bolts. The L-shaped thin plate of the wireless energy transmission ring fixing device is connected to the wireless energy transmission ring by bolts. By adjusting the position of the thin-walled bearing on the main shaft, the spacing between the wireless energy transmission ring and the ultrasonic auxiliary tool handle energy receiving ring is 5-8 microns.

[0116] The ultrasonic power supply provides power energy for the ultrasonic assisted cutting device, converting the 220-volt power supply into an ultrasonic power supply. The energy supply is connected to the piezoelectric actuator to excite the ultrasonic vibration transformer to ultrasonically vibrate. The ultrasonic assisted toolholder receives the energy transmitted by its energy receiving ring, and the ultrasonic transformer inside it is connected to the piezoelectric actuator. Under the excitation of the piezoelectric actuator, the ultrasonic transformer generates axial vibration, and the ultrasonic transformer is fixedly connected to the gear shaping cutter, driving the gear shaping cutter to vibrate axially. This is because the up and down movement of the gear shaping cutter is in the direction of the cutting speed, that is, the axial direction of the spindle and the gear shaping cutter. The ultrasonic vibration generated in the axial direction can form interval cutting, which can quickly and effectively improve the cutting performance without affecting the geometric accuracy of the high-strength gear workpiece. The gear workpiece is fixed on the workbench and moves with the workbench.

[0117] Figure 4 The structure diagram of an electronic device according to a specific embodiment of the present application is schematically shown. Figure 4As shown, an embodiment of the present application provides an electronic device 4000, including a processor 4100 and a memory 4200, wherein the memory 4200 stores machine executable instructions that can be executed by the processor 4100, and the processor 4100 can execute the machine executable instructions to implement the above-mentioned method for precise design of a high-strength gear ultrasonic gear shaping device.

[0118] An embodiment of the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the method for precise design of the high-strength gear ultrasonic gear shaping device described above.

[0119] The above technical solution obtains the initial gear cutting force when the ultrasonic gear shaping device is not turned on; determines the initial ultrasonic power according to the initial gear shaping cutting force; performs a gear shaping cutting force test based on the initial ultrasonic power to obtain a first gear shaping cutting force; determines the first ultrasonic power according to the first gear shaping cutting force; performs a gear shaping cutting force test based on the first ultrasonic power to obtain a second gear shaping cutting force; and determines the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force. The above technical solution can optimize the matching of the ultrasonic power of the ultrasonic gear shaping device by determining the gear shaping cutting force and determining the target ultrasonic power of the ultrasonic gear shaping device according to the size relationship between the difference between the first gear shaping cutting force and the second gear shaping cutting force and a preset value, thereby achieving efficient and precise machining of high-strength gears.

[0120] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0123] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0124] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0125] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0126] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

[0127] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A method for accurately designing a high-strength gear ultrasonic gear shaping device, characterized in that: The method comprises: When the ultrasonic gear shaping device is not turned on, obtaining an initial gear shaping cutting force; determining an initial ultrasonic power according to the initial gear shaping cutting force; Performing a gear cutting force test based on the initial ultrasonic power to obtain a first gear cutting force; determining a first ultrasonic power according to the first gear cutting force; Performing a gear-shaping cutting force test based on the first ultrasonic power to obtain a second gear-shaping cutting force; The target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference between the first gear shaping cutting force and the second gear shaping cutting force.

2. The method according to claim 1, characterized in that: Determining the initial ultrasonic power according to the initial gear shaping cutting force comprises: Obtaining ultrasonic vibration amplitude, power frequency of ultrasonic gear shaping system and vibration time; Determine, according to the ultrasonic vibration amplitude, the power frequency, the vibration time and the initial gear shaping cutting force, a first power required to generate the ultrasonic vibration amplitude, a second power required to overcome the cutting force, and a third power required for the ultrasonic gear shaping system to maintain stable vibration; The sum of the first power, the second power and the third power is determined as the initial ultrasonic power.

3. The method according to claim 2, characterized in that The determining of the first power includes: Determine the vibration displacement, vibration velocity and vibration acceleration of the ultrasonic gear shaping system according to the ultrasonic vibration amplitude, the power frequency and the vibration time; Determining a target excitation force according to the vibration displacement, the vibration velocity, the vibration acceleration, the modal mass, the modal stiffness, and the modal damping; The product of the target exciting force and the vibration velocity is determined as the first power.

4. The method according to claim 3, characterized in that The determination of the second power includes: The product of the initial gear cutting force and the vibration speed is determined as the second power.

5. The method according to claim 2, characterized in that: The third power satisfies the formula: Wherein, P is the third power, x v is the ultrasonic vibration amplitude, f v is the power supply frequency, is the modal damping.

6. The method according to claim 1, characterized in that The step of determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force comprises: determining a first absolute value of a difference between the first gear cutting force and the second gear cutting force; When the first absolute value is less than or equal to a first preset value, determining the first ultrasonic power as the target ultrasonic power; When the first absolute value is greater than the first preset value, determining a second ultrasonic power according to the second gear cutting force and the vibration speed; Performing a gear-shaping cutting force test based on the second ultrasonic power to obtain a third gear-shaping cutting force; The target ultrasonic power of the ultrasonic gear shaping device is determined according to the difference between the second gear shaping cutting force and the third gear shaping cutting force.

7. The method according to claim 6, characterized in that The step of determining the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the second gear shaping cutting force and the third gear shaping cutting force comprises: determining a second absolute value of a difference between the second gear cutting force and the third gear cutting force; When the second absolute value is less than or equal to a second preset value, determining the second ultrasonic power as the target ultrasonic power; When the second absolute value is greater than the second preset value, an average value of the second gear cutting force and the third gear cutting force is determined as a fourth gear cutting force; The target ultrasonic power is determined according to the fourth gear cutting force and the vibration speed.

8. A device for accurately designing a high-strength gear ultrasonic gear shaping device, characterized in that: The device comprises: An initial gear shaping cutting force determination module, used for obtaining the initial gear shaping cutting force when the ultrasonic gear shaping device is not turned on; An initial ultrasonic power determination module, used to determine the initial ultrasonic power according to the initial gear cutting force; A first gear cutting force determination module, configured to perform a gear cutting force test based on the initial ultrasonic power to obtain a first gear cutting force; A first ultrasonic power determination module, configured to determine a first ultrasonic power according to the first gear cutting force; A second gear cutting force determination module, configured to perform a gear cutting force test based on the first ultrasonic power to obtain a second gear cutting force; The target ultrasonic power determination module is used to determine the target ultrasonic power of the ultrasonic gear shaping device according to the difference between the first gear shaping cutting force and the second gear shaping cutting force.

9. An electronic device, characterized in that: include: a memory configured to store instructions; as well as A processor is configured to call the instructions from the memory and implement the method for precise design of a high-strength gear ultrasonic gear shaping device according to any one of claims 1 to 7 when executing the instructions.

10. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions for causing a machine to execute the method for accurately designing a high-strength gear ultrasonic gear shaping device according to any one of claims 1 to 7.

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