Parameter Analysis and Verification Method of Cycloidal Machining

Abstract

The present invention relates to the technical field of cycloid parameter analysis, and specifically to a parameter analysis and verification method for cycloid rotation processing, comprising the following steps: establishing a motion trajectory formula of a cutting point p during cycloid processing; obtaining influencing parameters of a quasi-analysis based on the motion trajectory formula of the cutting point p; selecting at least one variable from the influencing parameters of the quasi-analysis, and taking fixed values ​​for the remaining influencing parameters of the quasi-analysis to obtain at least two groups of cycloid trajectories; verifying the validity of the cycloid trajectory through a verification unit; after the validity of the cycloid trajectory is verified, comparing the cycloid trajectory to obtain the influence of the influencing parameters of the quasi-analysis on the cycloid shape. The present invention clarifies the important influencing parameters in the cycloid rotation processing by obtaining the influence of each influencing parameter on the cycloid shape in the cycloid rotation processing. This is to expand the application scope of the existing cycloid rotation machine tools and improve the versatility of cycloid rotation processing.

Description

Technical Field

[0001] The invention relates to the technical field of cycloid parameter analysis, and in particular to a parameter analysis and verification method for cycloid rotation processing. Background Art

[0002] At present, the traditional processing method for even polygons and end straight groove workpieces in China is to use milling machines, planers and other machine tools for processing. The processing process includes non-continuous movements such as idle strokes. For example, after a vertical milling machine completes work at a cutting position, it often needs to move to another position to continue working. This movement process does not involve material removal, resulting in unsatisfactory production efficiency and processing accuracy.

[0003] Cycloidal cycloid machining is a method that uses cycloidal trajectories to transform discontinuous machining into continuous machining, which can effectively improve production efficiency and machining accuracy. However, the strong specialization of cycloidal cycloid machining machine tools is not conducive to promotion. If the influence of various cycloidal parameters on the cycloidal shape is obtained, the application range of cycloidal cycloid machining machine tools can be effectively expanded and the versatility of cycloidal cycloid machining can be improved. Therefore, it is necessary to analyze the cycloidal parameters of cycloidal cycloid machining. Summary of the invention

[0004] To solve the above problems, the present invention provides a parameter analysis and verification method for cycloid rotation machining, which is used to analyze the influence of various cycloid parameters on the cycloid shape, so as to expand the application scope of cycloid rotation machine tools.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows: a parameter analysis and verification method of cycloid rotation processing, comprising the following steps:

[0006] Establishing cutting points during trochoidal machining The motion trajectory formula of

[0007] Based on cutting point The motion trajectory formula is used to obtain the influencing parameters to be analyzed;

[0008] At least one of the influencing parameters to be analyzed is selected as a variable, and the other influencing parameters to be analyzed are set as fixed values ​​to obtain at least two groups of cycloid trajectories;

[0009] The validity of the cycloid trajectory is verified by a verification unit;

[0010] After the validity of the cycloid trajectory is verified, the cycloid trajectory is compared to obtain the influence of the influencing parameters to be analyzed on the cycloid shape.

[0011] Further, the cutting point The motion trajectory formula is:

[0012] ;

[0013] ;

[0014] in, is the radius of the cycloid base circle, is the radius of the generating circle, To generate the circular rotation angle, Cutting point The distance to the center of the circle, To generate the circular rotation angle, is the initial angle at which the cycloid occurs;

[0015] The corresponding influencing parameters to be analyzed are: cycloid base circle radius , radius of the generating circle , the circular rotation angle , cutting point Distance to the center of the circle , the circular rotation angle occurs The initial angle of the cycloid .

[0016] Furthermore, when the circular rotation angle When taking variables, based on the motion trajectory formula, the circular rotation angle occurs With the occurrence of circular rotation angle Change; Cycloid base circle radius , radius of the generating circle , cutting point Distance to the center of the circle The initial angle of the cycloid Take a fixed value;

[0017] Get at least two different sets of circular rotation angles The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the different circular rotation angles are compared. Take the cycloid trajectory under the value and obtain the circular rotation angle and the circular rotation angle Effect on the shape of the cycloid.

[0018] Furthermore, the initial angle of the cycloid Used to adjust the relative position of the tool axis and the workpiece in the circumferential direction; when the initial angle of the cycloid occurs When the value is set, the radius of the cycloid base circle , radius of the generating circle , the circular rotation angle and cutting point Distance to the center of the circle Take a fixed value;

[0019] Get the initial angles of at least two different cycloids The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the initial angles of different cycloids are compared. The cycloid trajectory under the value is obtained to obtain the initial angle of the cycloid Effect on the shape of the cycloid.

[0020] Furthermore, when the cutting point Distance to the center of the circle When taking variables, cutting point Distance to the center of the circle The value of , is any rational number, the radius of the cycloid base circle , radius of the generating circle , the circular rotation angle The initial angle of the cycloid Take a fixed value;

[0021] Get at least two sets of different cutting points Distance to the center of the circle The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the different cutting points are compared Distance to the center of the circle Take the cycloid trajectory under the value and get the cutting point Distance to the center of the circle Effect on the shape of the cycloid.

[0022] Furthermore, when the cycloid base circle radius and the radius of the circle When taking variables, the circular rotation angle occurs , cutting point Distance to the center of the circle , the circular rotation angle occurs The initial angle of the cycloid Take a fixed value;

[0023] Get at least two different cycloid base circle radii and the radius of the circle The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the different cycloid base circle radii are compared and the radius of the circle The cycloid trajectory under the value is obtained to obtain the cycloid base circle radius and the radius of the circle Effect on the shape of the cycloid.

[0024] The above scheme has the following beneficial effects:

[0025] 1. This solution is based on the principle of cycloidal rotational machining. Two servo spindles drive the workpiece and the tool to rotate synchronously at a certain speed, so that the cutting point Move along the cycloid trajectory, thus establishing the cutting point The motion trajectory formula can be used to obtain the influencing parameters in the cycloid rotation process, and the associated or unassociated influencing parameters are taken as variables, and the remaining influencing parameters are taken as fixed values. In this way, the influence of each influencing parameter on the cycloid shape in the cycloid rotation process is obtained, and the important influencing parameters in the cycloid rotation process are clarified based on this. Compared with the existing cycloid rotation machine tools, it can expand its application range and improve the versatility of cycloid rotation processing.

[0026] 2. This scheme verifies the validity of the cycloid trajectory based on the simulated cycloid trajectory to verify the change of the cycloid shape in the actual processing scenario when the parameters have different values. Compared with only using the model or simulation software to analyze the parameters affecting the cycloid shape, it can more realistically obtain the influence of each parameter on the cycloid shape in the actual processing scenario.

[0027] 3. This solution can clearly identify the key parameters that affect the cycloid shape and machining process, so as to adjust the corresponding parameters and make the existing cycloid turning machine suitable for more workpiece machining scenarios. Under the premise of ensuring machining efficiency, it can improve the machining accuracy of even polygons, end face grooves and odd polygon parts.

[0028] Further, the verification unit includes a data acquisition module, a verification mechanism, a first verification module and a main control module;

[0029] The data acquisition module is used to collect the variables of the selected items in the influencing parameters to be analyzed and the fixed values ​​of the other influencing parameters to be analyzed, and based on the cutting point The motion trajectory formula is used to obtain the cycloid trajectory corresponding to the variables and the number of constant value groups taken;

[0030] The verification mechanism includes a base, a Y-axis slide is arranged on the base, a Y-axis servo motor for driving the Y-axis slide is also arranged on the base, and a Y-axis support plate is arranged on the Y-axis slide; an X-axis slide is arranged on the Y-axis support plate, an X-axis servo motor for driving the X-axis slide is also arranged on the Y-axis support plate, and an X-axis support plate is arranged on the X-axis slide; a support frame is arranged on the X-axis support plate, a workbench is rotatably connected between the support frames, a working hole is opened in the middle of the workbench, and a working sleeve is sleeved in the working hole, a chuck for fixing the workpiece is rotatably connected in the working sleeve, a first angle servo motor for driving the workbench to rotate is arranged on the support frame, and a second angle servo motor for driving the chuck to rotate is arranged on the workbench; a column is also fixedly connected to the base, a Z-axis slide is arranged on the side of the column, a Z-axis servo motor for driving the Z-axis slide to operate is also arranged on the side of the column, a spindle box is arranged on the Z-axis slide, a spindle for fixing the tool is arranged at the end of the spindle box away from the Z-axis slide, and a reduction motor for driving the spindle to operate is arranged on the top of the spindle box;

[0031] The first verification module includes a first angular position sensor disposed at the output shafts of the Y-axis servo motor, the X-axis servo motor, the Z-axis servo motor, the first angle servo motor, and the second angle servo motor;

[0032] The main control module is used to generate workpiece processing information and use the variables or constants of the influencing parameters as tool operation information, control the operation of the Y-axis servo motor, the X-axis servo motor, the Z-axis servo motor, the first angle servo motor and the second angle servo motor based on the workpiece processing information and the tool operation information, and obtain the angle information collected by each first angular position sensor, output a verification trajectory based on the angle information collected by the first angular position sensor, and compare the verification trajectory with the cycloid trajectory to output a first verification result.

[0033] Furthermore, the chuck includes a chuck body and a clamping claw slidably connected to the chuck body, a clamping motor for driving the clamping claw to slide is fixedly connected to the side wall of the chuck body, and a second angular position sensor is arranged at the output shaft of the clamping motor;

[0034] The verification unit also includes a second verification module; the second verification module includes a plurality of power connection modules and verification contacts arranged at one end of each claw close to the center of the chuck body, the verification contacts are made of conductive material and are telescopic structures, and the ends of the verification contacts extend outside the claws in the initial state, and the verification contacts on the same claws are electrically connected to the same power connection module, and a first pressure sensor is arranged at one end of each claw close to the center of the chuck body, and the clamping motor, the second angular position sensor, the power connection module and the first pressure sensor are all electrically connected to the main control module;

[0035] The main control module is used to receive the pressure signal collected by the first pressure sensor and control the operation of the engaging motor. When the pressure signal collected by the first pressure sensor meets the preset value, the distance between the clamping claws is output based on the angle information collected by the second angular position sensor; and while controlling the operation of the Y-axis servo motor, the X-axis servo motor, the Z-axis servo motor, the first angle servo motor and the second angle servo motor, the power connection module is controlled to switch different verification contacts to be electrically connected to the main control module, the real-time change of the resistance value of the workpiece is detected based on the verification contacts electrically connected to the main control module, the cross-sectional information of the processing area is obtained based on the verification trajectory, the cross-sectional area of ​​the workpiece between each verification contact is obtained based on the cross-sectional information of the processing area, and the actual real-time loss of the workpiece is calculated based on the distance between the clamping claws, the real-time change of the resistance value of the workpiece between the verification contacts and the cross-sectional area of ​​the workpiece between the verification contacts. , based on the cycloid trajectory to obtain the real-time loss of the workpiece ,contrast and The second verification result is output.

[0036] Furthermore, the actual real-time loss The calculation formula is as follows:

[0037] ;

[0038] In the formula, is the real-time change of the workpiece resistance value. To verify the cross-sectional area of ​​the workpiece between the contact points, is the distance between the jaws, is the resistivity of the workpiece; Changes based on workpiece material changes for validation machining.

[0039] Furthermore, the verification unit also includes a third verification module, which includes a plurality of quality sensors fixedly connected to the surface of the chuck body, the quality sensors are electrically connected to the main control module, and the quality sensors are used to detect the actual quality of the workpiece being processed at multiple moments. , based on the real-time loss of the workpiece , the quality of the workpiece at multiple moments is calculated and verified by the following formula: :

[0040] ;

[0041] In the formula, To verify the initial quality of the machined workpiece, To verify the density of the machined workpiece;

[0042] contrast and The third verification result is output.

[0043] The above scheme has the following beneficial effects:

[0044] 1. Compared with the traditional trajectory verification method, this scheme can obtain the actual cycloid trajectory in real time during the verification of workpiece processing. Based on the comparison between the actual cycloid trajectory (verification trajectory) obtained in real time and the cycloid trajectory simulated by software or formula, the validity of the cycloid trajectory simulated by software or formula can be verified, so as to more accurately obtain the influence of various parameters on the cycloid shape.

[0045] 2. This scheme, based on the cycloidal trajectory obtained by the set variables and constants, can obtain the cross-sectional changes of the machining area of ​​the workpiece during the entire period of machining of the verification workpiece, and calculate the estimated amount of metal cut off by the verification workpiece under the cycloidal rotational machining technology; by obtaining the actual resistance change of the verification workpiece during the machining of the verification workpiece, the actual amount of metal cut off by the verification workpiece under the cycloidal rotational machining technology can be calculated by formula derivation based on the actual resistance change; by comparing the estimated amount of metal cut off with the actual amount of metal cut off, it can reflect the degree of matching between the actual cycloidal trajectory of the current period and the cycloidal trajectory simulated by the software or formula, and further accurately obtain the influence of each parameter on the cycloidal shape.

[0046] 3. This solution, based on the comparison of the amount of metal cut off under the cycloidal rotation processing technology, further introduces quality inspection and verification of the verification workpiece. Similar to the change in the amount of metal cut off under the cycloidal rotation processing technology, the quality of the verification workpiece after cutting under the cycloidal rotation processing technology changes in real time. The comparison between the estimated quality change and the actual quality change during the entire processing period can reflect the matching degree between the actual cycloidal trajectory of the current period and the cycloidal trajectory simulated by the software or formula, and further accurately obtain the influence of each parameter on the cycloidal shape.

[0047] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a general flow chart of an embodiment of a method for parameter analysis and verification of cycloid rotation processing of the present invention;

[0049] Figure 2 A schematic diagram of cycloid trajectory generation in an embodiment of a parameter analysis and verification method for cycloid rotational machining of the present invention;

[0050] Figure 3 The present invention is a parameter analysis and verification method embodiment of the cycloid rotation processing Schematic diagram of the effect on the cycloid shape;

[0051] Figure 4 The present invention is a parameter analysis and verification method embodiment of the cycloid rotation processing Schematic diagram of the effect on the cycloid shape;

[0052] Figure 5 The present invention is a parameter analysis and verification method embodiment of the cycloid rotation processing Schematic diagram of the effect on the cycloid shape;

[0053] Figure 6 The present invention is a parameter analysis and verification method embodiment of the cycloid rotation processing Schematic diagram of the effect on the cycloid shape;

[0054] Figure 7 An axonometric diagram of a verification mechanism for an embodiment of a parameter analysis and verification method for cycloid rotational processing according to the present invention;

[0055] Figure 8 A front view of a verification mechanism of an embodiment of a method for parameter analysis and verification of cycloid rotational processing according to the present invention;

[0056] Fig. 9 A side view of a verification mechanism of an embodiment of a method for parameter analysis and verification of cycloid rotational processing according to the present invention;

[0057] Fig.10 An axonometric view of a chuck of an embodiment of a method for parameter analysis and verification of cycloid rotational processing according to the present invention;

[0058] Fig.11 A top view of a chuck of an embodiment of a method for parameter analysis and verification of cycloid rotational processing according to the present invention;

[0059] Fig.12 A front view of a chuck of an embodiment of a method for parameter analysis and verification of cycloid rotational processing according to the present invention;

[0060] Fig.13 The present invention is a parameter analysis and verification method embodiment of the cycloid rotation processing Fig.12 A is a partial enlarged schematic diagram.

[0061] The figure marks in the drawings of the specification include: 1. base; 2. column; 3. Z-axis slide; 4. Z-axis servo motor; 5. reduction motor; 6. spindle box; 7. spindle; 8. first angle servo motor; 9. support frame; 10. workbench; 11. chuck; 12. second angle servo motor; 13. shield; 14. X-axis slide; 15. X-axis servo motor; 16. Y-axis slide; 17. Y-axis servo motor; 18. X-axis support plate; 19. Y-axis support plate; 20. claw; 21. verification contact; 22. engagement motor; 23. quality sensor. DETAILED DESCRIPTION

[0062] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The following is further described in detail through specific implementation methods:

[0066] Example 1, parameter analysis and verification method of cycloid rotation processing, such as Figure 1 The overall steps of this embodiment are shown in FIG. 1 , which include:

[0067] S1: Establish cutting points during trochoidal machining The motion trajectory formula of

[0068] S2: Based on cutting point The motion trajectory formula is used to obtain the influencing parameters to be analyzed;

[0069] The above steps are mainly used to determine the cutting point The parameters that may be related to the motion trajectory; the cutting point established in this embodiment The motion trajectory formula is as follows:

[0070] ;

[0071] ;

[0072] in, is the radius of the cycloid base circle, is the radius of the generating circle, To generate the circular rotation angle, Cutting point The distance to the center of the circle, To generate the circular rotation angle, is the initial angle at which the cycloid occurs.

[0073] Therefore, the parameters that may affect the cycloid shape during cycloid rotation processing can be determined mainly include: cycloid base circle radius , radius of the generating circle , the circular rotation angle , cutting point Distance to the center of the circle , the circular rotation angle occurs The initial angle of the cycloid The specific meaning of each parameter is as follows Figure 2 shown.

[0074] S3: At least one of the influencing parameters to be analyzed is selected as a variable, and the other influencing parameters to be analyzed are set as fixed values ​​to obtain at least two sets of cycloid trajectories (which can be obtained by simulation using existing CAM software); specifically, for the above-determined parameters that may affect the cycloid shape during the cycloid rotation process, the following comparative analysis is performed:

[0075] (1) When a circular rotation angle occurs When taking variables, based on the motion trajectory formula, the circular rotation angle occurs With the occurrence of circular rotation angle Change; Cycloid base circle radius , radius of the generating circle , cutting point Distance to the center of the circle The initial angle of the cycloid Get a fixed value. Get at least two different sets of circular rotation angles The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the different circular rotation angles are compared. Take the cycloid trajectory under the value and obtain the circular rotation angle and the circular rotation angle Effect on the shape of the cycloid.

[0076] For example: a circular rotation angle occurs When 0.5 and 1 are taken respectively, both =50, =17, =4, =0.523, the two sets of cycloid trajectories obtained are as follows Figure 3As shown in the figure, it can be obtained that the shape and position of the cycloid trajectory have not changed, but the length of the cycloid trajectory has changed, which can temporarily confirm the occurrence of the circular rotation angle It only affects the length of the cycloid trajectory but not the shape of the cycloid trajectory.

[0077] In addition, due to the circular rotation angle The circular rotation angle , Cycloid base circle radius and the radius of the circle The functional relationship is as follows:

[0078] ;

[0079] You can get the rotation angle along with , but has no effect on the shape of the cycloid trajectory.

[0080] (2) Initial angle of cycloid Used to adjust the relative position of the tool axis and the workpiece in the circumferential direction; when the initial angle of the cycloid occurs When the value is set, the radius of the cycloid base circle , radius of the generating circle , the circular rotation angle and cutting point Distance to the center of the circle Get the initial angles of at least two different cycloids. The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the initial angles of different cycloids are compared. The cycloid trajectory under the value is obtained to obtain the initial angle of the cycloid Effect on the shape of the cycloid.

[0081] For example: The initial angle of the cycloid When -2, 0, and 2 are taken respectively, =40, =20, =35, =1, the three sets of cycloid trajectories obtained are as follows Figure 4 As shown in the figure, it can be seen that the shape of the cycloid trajectory has not changed, only the position of the cycloid trajectory has changed. It only affects the initial position of the cycloid, but does not affect the shape of the cycloid. In actual machining, it is used to adjust the relative position of the tool axis and the workpiece in the circumferential direction.

[0082] (3) When the cutting point Distance to the center of the circle When taking variables, cutting point Distance to the center of the circle The value of , is any rational number, the radius of the cycloid base circle , radius of the generating circle , the circular rotation angle The initial angle of the cycloid Get a fixed value. Get at least two sets of different cutting points Distance to the center of the circle The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the different cutting points are compared Distance to the center of the circle Take the cycloid trajectory under the value and get the cutting point Distance to the center of the circle Effect on the shape of the cycloid.

[0083] For example: cutting point Distance to the center of the circle Take separately = , = +4, = -4, = +8, = -8 o'clock, both =32, =12, =1.8, =1.7. Cutting point The distance to the center of the occurrence circle is Equivalent to the tool tip turning radius during machining. When the cycloid changes from 0 to 2π, it completes a cycle. When the cycloid continues to increase, the shape of the cycloid will not change at all, but will just repeat the trajectory of the previous cycle at another position. Therefore, it is sufficient to study the changing law of the cycloid in one cycle. =[0,π], the radius of curvature of the cycloid is the maximum value Gradually decreases to a minimum ;when =[π,2π], the radius of curvature of the cycloid changes from the minimum value Return to maximum value .Right now =π is the point where the cycloid trajectory has the largest polar radius and the curvature radius of this point is the minimum value. , this point is called the inversion point of the cycloid trajectory.

[0084] The five sets of cycloid trajectories obtained are as follows Figure 5 As shown, it can be temporarily determined when When , the cycloid has a sharp point at the maximum polar diameter, and the curvature radius of the sharp point is zero; when > or < hour, and The greater the difference in the value of , the greater the radius of curvature of the cycloid at the maximum polar diameter, and the smoother the cycloid trajectory. near When , the cycloid tends to shrink toward the middle and become thinner. keep away When , the cycloid gradually expands to both sides and its shape becomes fatter.

[0085] (4) When the radius of the cycloid base circle and the radius of the circle When taking variables, the circular rotation angle occurs , cutting point Distance to the center of the circle , the circular rotation angle occurs The initial angle of the cycloid Get a fixed value. Get at least two different cycloid base circle radii and the radius of the circle The cycloid trajectory under the value is taken, and after the validity of the cycloid trajectory is verified, the different cycloid base circle radii are compared and the radius of the circle Take the cycloid trajectory under the value and obtain the cycloid base circle radius and the radius of the circle Effect on the shape of the cycloid.

[0086] For example: The radius of the circle Pick , , , , , , When =3.145, =2.24, =32, The seven sets of cycloid trajectories obtained are as follows Figure 6 As shown, when =1 / 2, the cycloid trajectory shrinks to a straight line; when When changing from 1 / 2 to 1, the cycloid shape gradually separates from a straight line to both sides. The influence on the shape of the cycloid is greater, which is equivalent to the speed ratio of the part axis and the tool axis during processing, and thus the radius of the cycloid base circle can be determined. and the radius of the circle In actual processing, it is used to change the speed ratio of the part axis and the tool axis so that the machine tool can adapt to the processing of parts of different types and shapes.

[0087] S4: verify the validity of the cycloid trajectory through the verification unit; this step is mainly used to verify the accuracy of the influence of the acquired influencing parameters on the cycloid shape, mainly through actual processing verification of the verification workpiece according to the acquired influencing parameters, and based on the cycloid trajectory of the actual acquisition of the verification workpiece during processing, the validity of the cycloid trajectory simulated by software or formula is verified (comparing the difference between the two). The cycloid trajectory during the verification workpiece processing can be achieved through image acquisition or other related trajectory recognition technologies.

[0088] S5: After the validity of the cycloid trajectory is verified, compare the cycloid trajectory to obtain the influence of the influencing parameters to be analyzed on the cycloid shape. This step is performed after the validity of the cycloid trajectory is verified. If the validity of the cycloid trajectory simulated by the software or formula is verified, the influence of the output influencing parameters on the cycloid shape corresponds to the results obtained by the S3 analysis; if the validity of the cycloid trajectory simulated by the software or formula is not verified, the influence of the output influencing parameters on the cycloid shape may deviate from the results obtained by the S3 analysis. Therefore, it is necessary to combine parameters such as processing materials and processing environment to analyze and obtain the influence of the influencing parameters on the cycloid shape in more detail.

[0089] Embodiment 2: Since the verification of the cycloid trajectory during the workpiece processing by image acquisition requires the acquisition of images at multiple angles and is easily affected by environmental factors, this embodiment aims to provide a verification unit capable of multi-angle verification, such as Figure 7-Figure 13 As shown, the verification unit includes a data acquisition module for collecting various parameters, a verification mechanism for actually processing the verification workpiece, and a main control module for calculating and outputting the verification results; as well as a first verification module, a second verification module, and a third verification module for performing trajectory verification from different angles.

[0090] The data acquisition module is used to collect the variables of the items selected from the influencing parameters to be analyzed and the constants of the other influencing parameters to be analyzed, and obtain the cycloid trajectory corresponding to the number of variables and the constant value groups taken based on the motion trajectory formula of the cutting point p (corresponding to the software or formula simulating the cycloid trajectory in Example 1), and the number of cycloid trajectories corresponds to the value of the variable.

[0091] The verification mechanism includes a base 1, to which a Y-axis slide 16 (composed of a slide rail and a slider) is fixedly connected, and a Y-axis servo motor 17 (driving the slider to slide along the slide rail through a lead screw structure) is also provided on the base 1 to drive the Y-axis slide 16 to operate, and a Y-axis support plate 19 is provided on the Y-axis slide 16. This part of the structure is used to provide the displacement of the workpiece on the Y axis for verification.

[0092] The X-axis slide 14 (also composed of a slide rail and a slider) is fixedly connected to the Y-axis support plate 19, and an X-axis servo motor 15 (also driven by a lead screw structure to drive the slider to slide along the slide rail) for driving the X-axis slide 14 is also provided on the Y-axis support plate 19, and an X-axis support plate 18 is provided on the X-axis slide 14. This part of the structure is used to verify the displacement of the workpiece on the X-axis.

[0093] A support frame 9 is arranged on the X-axis support plate 18, and a workbench 10 is rotatably connected between the support frames 9. The workbench 10 is mainly used to carry and verify the workpiece. A working hole is opened in the middle of the workbench 10, and a working sleeve is sleeved in the working hole. A chuck 11 for fixing the workpiece is rotatably connected in the working sleeve. A first angle servo motor 8 for driving the workbench 10 to rotate is arranged on the support frame 9, and a second angle servo motor 12 for driving the chuck 11 to rotate is arranged on the workbench 10. The first angle servo motor 8 and the workbench 10 are driven by a coaxial connection, and the first angle servo motor 8 is a servo motor with a brake, and the second angle servo motor 12 and the chuck 11 are connected by gear meshing.

[0094] The base 1 is also fixedly connected with a column 2, a Z-axis slide 3 (also composed of a slide rail and a slider) is arranged on the side of the column 2, a Z-axis servo motor 4 for driving the Z-axis slide 3 is also arranged on the side of the column 2 (driving the slider to slide along the slide rail through a lead screw structure), a spindle box 6 is arranged on the Z-axis slide 3, a spindle 7 for fixing the tool is arranged at one end of the spindle box 6 away from the Z-axis slide 3, and a reduction motor 5 for driving the spindle 7 is arranged on the top of the spindle box 6. This part of the structure realizes the drive of the tool and the displacement on the Z axis.

[0095] The first verification module includes a first angular position sensor disposed at the output shaft of the Y-axis servo motor 17, the X-axis servo motor 15, the Z-axis servo motor 4, the first angle servo motor 8, and the second angle servo motor 12. The detection shaft of the first angular position sensor is coaxially connected with the output shaft of each motor, so as to realize the acquisition of the rotation angle of the output shaft of each motor. In addition, the slide rails involved in this embodiment are all covered and protected by the protective cover 13.

[0096] The main control module is used to generate workpiece processing information and use the variables and constants of the influencing parameters as tool operation information. The workpiece processing information corresponds to the processing size and shape information of the workpiece, etc., which can be set according to the actual verification requirements. It is preferred to use a smaller verification workpiece for verification to reduce the error caused by the verification workpiece being too large. The tool operation information corresponds to the running trajectory of the tool (the tool running trajectory here is also a simulated cycloid trajectory, which can be generated by using the corresponding software or program simulation as in Example 1).

[0097] Based on the workpiece processing information and the tool operation information, the Y-axis servo motor 17, the X-axis servo motor 15, the Z-axis servo motor 4, the first angle servo motor 8 and the second angle servo motor 12 are controlled to operate, and the angle information collected by each first angular position sensor is obtained. Based on the angle information collected by the first angular position sensor, a verification trajectory is output (the first verification information collected by the first verification module, which is used for comparison with the simulated cycloid trajectory). The verification trajectory is compared with the cycloid trajectory to output a first verification result. The first verification result is mainly the overlap between the actual cycloid estimate and the simulated cycloid. When the overlap meets the validity threshold, the cycloid trajectory simulated by the corresponding output is verified by the first verification module.

[0098] The acquisition of the verification trajectory specifically includes: preprocessing the angle information collected by each first angular position sensor by filtering, denoising, etc. to improve the measurement accuracy and stability; based on the preprocessed angle data, combined with the mechanical structure of the machine tool and the tool parameters (such as tool length, diameter, shape, etc.), the real-time position and operation trajectory of the tool in three-dimensional space are calculated through the coordinate transformation method. This operation trajectory is the verification trajectory.

[0099] The chuck 11 includes a chuck body 11 and a claw 20 slidably connected to the chuck body 11 . A clamping motor 22 for driving the claw 20 to slide is fixedly connected to the side wall of the chuck body 11 . A second angular position sensor is arranged at the output shaft of the clamping motor 22 .

[0100] The second verification module includes a number of power connection modules and a verification contact 21 provided at one end of each claw 20 near the center of the chuck 11 body. The verification contact 21 is made of conductive material and is a telescopic structure (an existing power connection contact structure, which will not be described in detail here). It should be noted that after the verification contact 21 contacts the verification workpiece and the claw 20 stably clamps the verification workpiece, the verification contact 21 remains in contact with the surface of the verification workpiece but may shrink inside the claw 20. In the initial state, the end of the verification contact 21 extends outside the claw 20, and the verification contact 21 on the same claw 20 is electrically connected to the same power connection module. The power connection module is a module that can be controlled by the main control module to regulate the connection and disconnection of different verification contacts 21 with it, such as an existing relay module. A first pressure sensor (not shown in the figure) is provided at one end of each claw 20 near the center of the chuck 11 body, and the clamping motor 22, the second angular position sensor, the power connection module and the first pressure sensor are all electrically connected to the main control module.

[0101] The main control module is used to receive the pressure signal collected by the first pressure sensor and control the operation of the clamping motor 22 to ensure that the clamping claws 20 stably clamp the verification workpiece. When the pressure signal collected by the first pressure sensor meets the preset value (stable clamping of the verification workpiece), the distance between the clamping claws 20 is output based on the angle information collected by the second angular position sensor. The principle of obtaining the verification trajectory is the same as the above, and the position of each clamping claw 20 in the three-dimensional space is obtained, so as to calculate and obtain the distance between the clamping claws 20.

[0102] The main control module is used to control the operation of the Y-axis servo motor 17, the X-axis servo motor 15, the Z-axis servo motor 4, the first angle servo motor 8 and the second angle servo motor 12, while controlling the power connection module to switch different verification contacts 21 to be electrically connected to the main control module. The real-time change in the resistance value of the workpiece is detected based on the verification contacts 21 electrically connected to the main control module. It should be noted that the real-time change in the resistance value is the change in the resistance value detected by the same pair of relative verification contacts 21. Usually, a pair of verification contacts 21 with the largest distance between the claws 20 or covering the processing area of ​​the verification workpiece are selected. The resistance value is repeatedly collected during the processing of the verification workpiece to obtain the real-time change in the resistance value of the verification workpiece.

[0103] The cross-sectional information of the processing area is obtained based on the verification trajectory, the cross-sectional area of ​​the workpiece between each verification contact 21 is obtained based on the cross-sectional information of the processing area, and the actual real-time loss of the workpiece is calculated based on the distance between the claws 20, the real-time change of the workpiece resistance value between the verification contacts 21, and the cross-sectional area of ​​the workpiece between the verification contacts 21. The calculation formula is as follows:

[0104] ;

[0105] In the formula, is the real-time change of the workpiece resistance value. To verify the cross-sectional area of ​​the workpiece between the contact points, is the distance between the jaws, is the resistivity of the workpiece; Based on the change of the workpiece material to be processed, the real-time loss of the workpiece is obtained based on the cycloidal trajectory (simulated cycloidal trajectory). (Based on software simulation output), comparison and The second verification result is output.

[0106] The principle of the second verification module is that, when the simulated cycloid machining trajectory is the same as the actual cycloid machining trajectory, the amount of metal cut off by the two at each time point in the entire machining period should be equal or the difference is within a small range. Therefore, this embodiment adopts the resistance change detection method, and can collect the resistance change situation online multiple times during the verification of the workpiece machining process, and use it to verify and compare whether the amount of metal cut off is corresponding multiple times, so as to perform a second validity verification on the simulated cycloid trajectory. If the difference in the amount of metal cut off is within the range that meets the validity requirements, the cycloid trajectory simulated by the corresponding output is verified by the second verification module.

[0107] The third verification module includes a plurality of quality sensors 23 fixedly connected to the surface of the chuck 11. The quality sensors 23 are distributed in the area of ​​the chuck 11 where the claws 20 are not provided, and it is necessary to ensure that each area is covered to ensure accurate detection of the quality of the verified workpiece. The quality sensors 23 are electrically connected to the main control module. The quality sensors 23 are used to detect the actual quality of the workpiece being verified at multiple times. , based on the real-time loss of the workpiece , the quality of the workpiece at multiple moments is calculated and verified by the following formula: :

[0108] ;

[0109] In the formula, To verify the initial quality of the machined workpiece, To verify the density of the processed workpiece; and The third verification result is output.

[0110] The principle of the third verification module is similar to that of the second verification module. When the simulated cycloid machining trajectory is the same as the actual cycloid machining trajectory, the amount of metal cut off at each time point in the entire machining period should be equal or different within a small range. Therefore, the remaining mass of the simulated verification workpiece should be equal to or different from the remaining mass of the actual verification workpiece within a small range. Thus, the third validity verification of the simulated cycloid trajectory is performed. If the difference between the remaining mass of the simulated verification workpiece and the remaining mass of the actual verification workpiece is within the range that meets the validity requirements, the cycloid trajectory simulated by the corresponding output is verified by the third verification module.

[0111] Based on the verification results of the first verification module, the second verification module and the third verification module, if all of them pass, the validity of the corresponding simulated cycloid trajectory passes the verification of S4. This embodiment is based on three-level verification, reflecting the validity of the simulated cycloid from multiple angles.

[0112] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. Parameter analysis and verification method of cycloid rotation processing, characterized in that: The steps include: Establish the motion trajectory formula of the cutting point p during cycloidal machining; Obtain the influencing parameters of the quasi-analysis based on the motion trajectory formula of the cutting point p; At least one of the influencing parameters to be analyzed is selected as a variable, and the other influencing parameters to be analyzed are set as fixed values ​​to obtain at least two groups of cycloid trajectories; The validity of the cycloid trajectory is verified by a verification unit; After the validity of the cycloid trajectory is verified, the cycloid trajectory is compared to obtain the influence of the influencing parameters to be analyzed on the cycloid shape; The verification unit includes a data acquisition module, a verification mechanism, a first verification module and a main control module; The data acquisition module is used to collect the variables of the items selected from the influencing parameters to be analyzed and the fixed values ​​of the other influencing parameters to be analyzed, and obtain the cycloid trajectory corresponding to the variables and the fixed value groups based on the motion trajectory formula of the cutting point p; The verification mechanism comprises a base (1), a Y-axis slide (16) is arranged on the base (1), a Y-axis servo motor (17) for driving the Y-axis slide (16) is also arranged on the base (1), a Y-axis support plate (19) is arranged on the Y-axis slide (16); an X-axis slide (14) is arranged on the Y-axis support plate (19), an X-axis servo motor (15) for driving the X-axis slide (14) is also arranged on the Y-axis support plate (19), an X-axis support plate (18) is arranged on the X-axis slide (14); a support frame (9) is arranged on the X-axis support plate (18), a workbench (10) is rotatably connected between the support frames (9), a working hole is opened in the middle of the workbench (10), a working sleeve is sleeved in the working hole, and a A chuck (11) for fixing a workpiece, a first angle servo motor (8) for driving a worktable (10) to rotate is arranged on the support frame (9), and a second angle servo motor (12) for driving the chuck (11) to rotate is arranged on the worktable (10); a column (2) is also fixedly connected to the base (1), a Z-axis slide (3) is arranged on the side of the column (2), a Z-axis servo motor (4) for driving the Z-axis slide (3) to operate is also arranged on the side of the column (2), a spindle box (6) is arranged on the Z-axis slide (3), a spindle (7) for fixing a tool is arranged at one end of the spindle box (6) away from the Z-axis slide (3), and a reduction motor (5) for driving the spindle (7) to operate is arranged on the top of the spindle box (6); The first verification module comprises a first angular position sensor arranged at the output shafts of the Y-axis servo motor (17), the X-axis servo motor (15), the Z-axis servo motor (4), the first angle servo motor (8) and the second angle servo motor (12); The main control module is used to generate workpiece processing information and use the variables and fixed values ​​of the influencing parameters as tool operation information, control the operation of the Y-axis servo motor (17), the X-axis servo motor (15), the Z-axis servo motor (4), the first angle servo motor (8) and the second angle servo motor (12) based on the workpiece processing information and the tool operation information, and obtain the angle information collected by each first angular position sensor, output a verification trajectory based on the angle information collected by the first angular position sensor, and compare the verification trajectory with the cycloid trajectory to output a first verification result; The chuck (11) comprises a chuck (11) body and a clamping claw (20) slidably connected to the chuck (11) body, a clamping motor (22) for driving the clamping claw (20) to slide is fixedly connected to the side wall of the chuck (11) body, and a second angular position sensor is arranged at the output shaft of the clamping motor (22); The verification unit further comprises a second verification module; the second verification module comprises a plurality of power connection modules and a verification contact (21) arranged at one end of each clamping claw (20) close to the center of the chuck (11); the verification contact (21) is made of a conductive material and is a telescopic structure; in an initial state, the end of the verification contact (21) extends outside the clamping claw (20); the verification contact (21) on the same clamping claw (20) is electrically connected to the same power connection module; a first pressure sensor is arranged at one end of each clamping claw (20) close to the center of the chuck (11); the clamping motor (22), the second angular position sensor, the power connection module and the first pressure sensor are all electrically connected to the main control module; The main control module is used to receive a pressure signal collected by a first pressure sensor and control the operation of a clamping motor (22); when the pressure signal collected by the first pressure sensor meets a preset value, the distance between the clamping claws (20) is output based on the angle information collected by the second angular position sensor; and when the operation of the Y-axis servo motor (17), the X-axis servo motor (15), the Z-axis servo motor (4), the first angle servo motor (8) and the second angle servo motor (12) is controlled, the power connection module is controlled to switch different verification contacts (21) to be electrically connected to the main control module; the real-time change in the resistance value of the workpiece is detected based on the verification contacts (21) electrically connected to the main control module; the cross-sectional information of the processing area is obtained based on the verification trajectory; the cross-sectional area of ​​the workpiece between the verification contacts (21) is obtained based on the cross-sectional information of the processing area; and the actual real-time loss amount ΔV of the workpiece is calculated based on the distance between the clamping claws (20), the real-time change in the resistance value of the workpiece between the verification contacts (21) and the cross-sectional area of ​​the workpiece between the verification contacts (21). i , based on the cycloid trajectory to obtain the real-time loss of the workpiece Δv i , compared with Δv i and ΔV i The second verification result is output.

2. The parameter analysis and verification method of cycloid rotation processing according to claim 1 is characterized in that: The motion trajectory formula of the cutting point p is: θ=(1-R / r)α,α≥0° Among them, R is the radius of the cycloid base circle, r is the radius of the generating circle, α is the revolution angle of the generating circle, e is the distance from the cutting point p to the center of the generating circle, θ is the rotation angle of the generating circle, and β is the initial angle of the cycloid generation; The corresponding influencing parameters to be analyzed are: the radius of the cycloid base circle R, the radius of the generating circle r, the revolution angle of the generating circle α, the distance e from the cutting point p to the center of the generating circle, the rotation angle θ of the generating circle and the initial angle β of the cycloid generation.

3. The parameter analysis and verification method of cycloid rotation processing according to claim 2 is characterized in that: When the revolution angle α of the occurrence circle is variable, based on the motion trajectory formula, the rotation angle θ of the occurrence circle changes with the revolution angle α of the occurrence circle; the radius R of the cycloid base circle, the radius r of the occurrence circle, the distance e from the cutting point p to the center of the occurrence circle, and the initial angle β of the cycloid occurrence are fixed; Obtain at least two sets of cycloid trajectories under different values ​​of the generation circle's orbital angle α, and after the validity of the cycloid trajectories is verified, compare the cycloid trajectories under different values ​​of the generation circle's orbital angle α to obtain the influence of the generation circle's orbital angle α and the generation circle's rotation angle θ on the cycloid shape.

4. The parameter analysis and verification method of cycloid rotation processing according to claim 2 is characterized in that: The initial angle β of the cycloid is used to adjust the relative position of the tool axis and the workpiece in the circumferential direction; when the initial angle β of the cycloid is fixed, the radius R of the cycloid base circle, the radius r of the generating circle, the revolution angle α of the generating circle and the distance e from the cutting point p to the center of the generating circle are fixed; Obtain at least two sets of cycloid trajectories under different values ​​of the initial angle β of the cycloid, and after the validity of the cycloid trajectories is verified, compare the cycloid trajectories under different values ​​of the initial angle β of the cycloid to obtain the influence of the initial angle β of the cycloid on the shape of the cycloid.

5. The parameter analysis and verification method of cycloid rotation processing according to claim 2, characterized in that: When the distance e from the cutting point p to the center of the generating circle is variable, the value of the distance e from the cutting point p to the center of the generating circle is r+n, n is an arbitrary rational number, and the radius R of the cycloid base circle, the radius r of the generating circle, the revolution angle α of the generating circle and the initial angle β of the cycloid generating circle are fixed; Obtain at least two sets of cycloid trajectories under different values ​​of the distance e from the cutting point p to the center of the occurrence circle, and after the validity of the cycloid trajectory is verified, compare the cycloid trajectories under different values ​​of the distance e from the cutting point p to the center of the occurrence circle to obtain the influence of the distance e from the cutting point p to the center of the occurrence circle on the cycloid shape.

6. The parameter analysis and verification method of cycloid rotation processing according to claim 2, characterized in that: When the radius R of the cycloid base circle and the radius r of the generating circle are variables, the revolution angle α of the generating circle, the distance e from the cutting point p to the center of the generating circle, the rotation angle θ of the generating circle and the initial angle β of the cycloid generating circle are constant; Obtain at least two sets of cycloid trajectories under different values ​​of cycloid base circle radius R and generating circle radius r, and after the validity of the cycloid trajectory is verified, compare the cycloid trajectories under different values ​​of cycloid base circle radius R and generating circle radius r to obtain the influence of cycloid base circle radius R and generating circle radius r on the cycloid shape.

7. The parameter analysis and verification method of cycloid rotation processing according to claim 1, characterized in that: Actual real-time loss ΔV i The calculation formula is as follows: Where ΔR is the real-time change in the resistance of the workpiece, S is the cross-sectional area of ​​the workpiece between the verification contacts (21), L is the distance between the claws (20), and ρ r is the resistivity of the workpiece; ρ r Changes based on workpiece material changes for validation machining.

8. The parameter analysis and verification method of cycloid rotation processing according to claim 7, characterized in that: The verification unit further comprises a third verification module, the third verification module comprising a plurality of mass sensors (23) fixedly connected to the surface of the chuck (11), the mass sensors (23) being electrically connected to the main control module, and the mass sensors (23) being used to detect the actual mass M of the workpiece being processed at multiple moments. i , based on the real-time loss of the workpiece Δv i , the mass m of the workpiece at multiple moments of the verification process is calculated by the following formula: i : m i =m-Δv i ·r d Where m is the initial mass of the workpiece to be processed, ρ d To verify the density of the machined workpiece; Compare m i and M i The third verification result is output.

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