Whirling machine tool with high machining precision and its milling method

Abstract

The application relates to the technical field of milling, in particular to a high-precision cyclone milling machine and a milling method thereof; based on the structure of the cyclone milling machine, the cyclone milling machine comprises the following: a rack; a hollow three-jaw chuck which is rotatably connected to the rack, the axial direction of the hollow three-jaw chuck being the X direction; a rotary driving mechanism which is connected between the rack and the hollow three-jaw chuck and used for driving the hollow three-jaw chuck to rotate; a moving seat which is movably connected to the rack along the X direction and located in the X direction of the three-jaw chuck; a first linear driving mechanism which is used for driving the moving seat to move; and the like; and a corresponding milling method; through the above improvement, high precision of the cyclone milling machine in milling large workpieces is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling, in particular to a high-precision cyclone milling machine and a milling method thereof. BACKGROUND

[0002] The cyclone milling machine is used for milling the milling part of a workpiece after the workpiece is positioned by rotating clamping. The cyclone milling machine in the prior art is generally used for milling small rotary workpieces, and cannot be used for milling large workpieces with a diameter of more than 1 m and a length of more than 1.5 m. On the one hand, the stability of the clamping and positioning cannot be guaranteed, which may cause the workpiece to shake during milling and affect the machining precision. On the other hand, the milling cutter body may be slightly worn during the milling process of the large workpiece. The cyclone milling machine in the prior art cannot adjust the position of the milling cutter in real time according to the wear of the milling cutter during milling, so that the milling depth of the part machined later has a slight deviation, which cannot meet the high-precision milling requirement. SUMMARY

[0003] The present application relates to the technical field of milling, in particular to a high-precision cyclone milling machine and a milling method thereof.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] The high-precision cyclone milling machine comprises:

[0006] a rack;

[0007] a hollow three-jaw chuck, which is rotatably connected to the rack, and the axial direction of the hollow three-jaw chuck is X direction;

[0008] a first rotary driving mechanism, which is connected between the rack and the hollow three-jaw chuck, and is used for driving the hollow three-jaw chuck to rotate;

[0009] a moving seat, which is movably connected to the rack along the X direction, and is located in the X direction of the three-jaw chuck;

[0010] a first linear driving mechanism, which is used for driving the moving seat to move;

[0011] a center frame, which is connected to the moving seat, and comprises a middle support arm and side support arms symmetrically distributed on both sides of the middle support arm in Y direction, and support rollers for abutting against the outer circumferential part of the workpiece are connected to the middle support arm and the side support arms;

[0012] The XYZ three-axis moving module is connected to the frame and is located at the X direction of the moving seat.

[0013] The milling assembly comprises a base, a mounting seat, a first telescopic driving member, a rotating cylinder, a rotating adjusting cylinder, a rotating adjusting seat, a connecting rod, a milling cutter connecting member, a milling cutter limiting seat, a milling cutter body and a second rotating driving mechanism.

[0014] The base is connected to the XYZ three-axis moving module, and the mounting seat is connected to the base.

[0015] One end of the first telescopic driving member is connected to the mounting seat.

[0016] The rotating cylinder is rotationally connected to the mounting seat through a first bearing, the axis of the first telescopic driving member coincides with the axis of the rotating cylinder, and the rotating adjusting cylinder is coaxially rotationally connected to the other end of the first telescopic driving member through a second bearing; the rotating adjusting cylinder is coaxially arranged in the rotating cylinder, and the circumferential surface of the rotating adjusting cylinder is provided with a limiting protruding part.

[0017] The rotating adjusting seat is provided with a cylindrical groove in sliding fit with the rotating adjusting cylinder, the inner wall of the cylindrical groove is provided with a spiral limiting groove, the cylindrical groove is coaxially and slidingly sleeved on the rotating adjusting cylinder, and the limiting protruding part is located in the spiral limiting groove.

[0018] The rotating adjusting seat is rotationally connected to the rotating cylinder through a third bearing; the third bearing is a one-way bearing.

[0019] A plurality of milling cutter limiting seats are connected to the end of the rotating cylinder in a circumferential array, the milling cutter limiting seat is provided with a limiting groove for slidingly connecting the milling cutter body; the milling cutter body is slidingly connected to the limiting groove, the inner side end of the milling cutter body is connected to the milling cutter connecting member, one end of the connecting rod is pivotally connected to the milling cutter connecting member, the other end is pivotally connected to an eccentric position of the end of the rotating adjusting seat, and the pivot axes of the two ends of the connecting rod are parallel to the axial direction of the rotating adjusting seat.

[0020] The second rotating driving mechanism is connected to the mounting seat, the second rotating mechanism is drivingly connected to the rotating cylinder, and is used for driving the rotating cylinder to rotate.

[0021] In the state that the second rotating mechanism drives the rotating cylinder to rotate, the rotating cylinder drives the rotating adjusting seat to synchronously rotate.

[0022] Further, in the high-precision cyclone milling machine structure, the supporting roller is a universal roller.

[0023] Further, in the high-precision cyclone milling machine tool structure, the second rotary driving mechanism comprises a driving motor, a first gear and a second gear, the driving motor is connected to the mounting base, the first gear is in transmission connection with the output shaft of the driving motor, and the second gear is coaxially sleeved on the outer wall of the rotary cylinder, and the first gear is engaged with the second gear.

[0024] Further, in the high-precision cyclone milling machine tool structure, the limiting groove of the milling cutter limiting seat is in the shape of a cuboid, and the side of the milling cutter body is in sliding fit with the limiting groove.

[0025] Further, in the high-precision cyclone milling machine tool structure, the first telescopic driving member is an electric telescopic cylinder.

[0026] Further, in the high-precision cyclone milling machine tool structure, the mounting base is pivotally connected to the base, and further comprising a second telescopic driving member, one end of the second telescopic driving member is pivotally connected to the base, and the other end is pivotally connected to the mounting base.

[0027] Further, in the high-precision cyclone milling machine tool structure, the second telescopic driving member is an electric telescopic cylinder.

[0028] The application also relates to a milling method of the high-precision cyclone milling machine tool.

[0029] A large cylindrical rotary workpiece is clamped on the outer wall close to one end of the hollow three-jaw chuck;

[0030] The first linear driving mechanism drives the moving base to move, and controls the middle support arm and the side support arm of the center frame to move, so that each support roller abuts against the outer wall of the large cylindrical rotary workpiece;

[0031] The XYZ three-axis moving module drives the milling cutter body of the milling assembly to move to the position of the inner wall of the large cylindrical rotary workpiece which needs to be milled;

[0032] The first linear driving mechanism drives the moving base to move, and controls the middle support arm and the side support arm of the center frame to move, so that each support roller abuts against the outer wall of the large cylindrical rotary workpiece;

[0033] The rotary driving mechanism drives the hollow three-jaw chuck to rotate, thereby driving the large cylindrical rotary workpiece to rotate, the second rotary driving mechanism drives the rotary cylinder to rotate, thereby driving the milling cutter body to rotate, and the inner wall of the large cylindrical rotary workpiece is milled;

[0034] During the milling process, the XYZ three-axis moving module is controlled to move along the X-axis, and the first linear driving mechanism is controlled to drive the moving base to move along the X-axis synchronously, so that the milling cutter body and each support roller are always located in the same vertical plane;

[0035] According to the wear rate of the milling cutter body, the first telescopic drive is controlled to move in extension, the limiting protrusion is caused to slide in the spiral limiting groove, the rotary adjusting seat is caused to rotate reversely relative to the rotary cylinder, the connecting rod is caused to drive the milling cutter body to move outward along the limiting groove, so as to offset the wear of the milling cutter.

[0036] Further, according to the wear rate of the milling cutter body, the first telescopic drive is controlled to move in extension, the limiting protrusion is caused to slide in the spiral limiting groove, the rotary adjusting seat is caused to rotate reversely relative to the rotary cylinder, the connecting rod is caused to drive the milling cutter body to move outward along the limiting groove, so as to offset the wear of the milling cutter, which is specifically as follows.

[0037] By establishing a machine learning model, the material property parameters, the environmental parameters and the milling machining parameters of the large cylindrical rotating workpiece are taken as input data, and the wear rate of the milling cutter body is taken as label data, and the machine learning model is trained through multiple training samples; before milling machining, the material property parameters, the environmental parameters and the milling machining parameters of the large cylindrical rotating workpiece are input into the trained machine learning model, and the corresponding wear rate value is output, the rate value of the extension movement of the first telescopic drive is calculated according to the wear rate value of the milling cutter body, the first telescopic drive is controlled to move in extension, the limiting protrusion is caused to slide in the spiral limiting groove, the rotary adjusting seat is caused to rotate reversely relative to the rotary cylinder, the connecting rod is caused to drive the milling cutter body to move outward along the limiting groove, so as to offset the wear of the milling cutter; the material property parameters include the material, hardness, thermal conductivity, elongation and surface roughness of the workpiece; the milling machining parameters include the rotating speed, torque of the milling cutter body, feed rate and milling depth of the milling cutter body; the environmental parameters include the environmental humidity and the environmental temperature.

[0038] Further, the machine learning model is specifically a deep neural network model.

[0039] The beneficial effects of the present application are that: by rotating the hollow three-jaw chuck on the rack, and by moving the seat connected to the center frame of the rack, through the cooperation of the center frame and the hollow three-jaw chuck, the large cylindrical rotary workpiece can be clamped more stably; the large cylindrical rotary workpiece can rotate stably, the milling assembly structure of a specific structure is connected through the XYZ three-axis moving module, when the whirlwind milling is processed, the milling assembly can drive the milling cutter body to extend into any position of the inner wall of the large cylindrical rotary workpiece, which is suitable for milling processing needs of various angles, and during the milling process, since the moving seat structure is arranged, the moving seat and the milling cutter body can move synchronously during the milling, so that the milling cutter body and each supporting roller are always located in the same vertical plane; the processing point of the milling cutter body is always stably supported by the supporting roller, so that the processing precision is better guaranteed. In the milling assembly structure, the first telescopic driving piece moves at a corresponding rate according to the tool wear rate, the screw limiting groove and the limiting convex part are slidably connected, the rotating adjusting seat slightly rotates relative to the rotating cylinder on the outside, so that the milling cutter body is driven by the connecting rod to move outward by a small distance, so as to offset the wear of the tool, thereby ensuring the processing precision. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a structure schematic view of a high-machining-precision whirlwind milling machine tool according to an embodiment of the present application;

[0041] Figure 2 It is a structure schematic view of a center frame of a high-machining-precision whirlwind milling machine tool according to an embodiment of the present application when clamping a large cylindrical rotary workpiece;

[0042] Figure 3 It is a structure schematic view of a first perspective of a milling assembly of a high-machining-precision whirlwind milling machine tool according to an embodiment of the present application;

[0043] Figure 4 It is an enlarged view of A of Figure 3

[0044] Figure 5 It is a structure schematic view of a second perspective of a milling assembly of a high-machining-precision whirlwind milling machine tool according to an embodiment of the present application;

[0045] Figure 6 It is a structure schematic view of a third perspective of a milling assembly of a high-machining-precision whirlwind milling machine tool according to an embodiment of the present application;

[0046] Figure 7 It is a sectional view of B-B of Figure 6

[0047] LABEL EXPLANATION ​​

[0048] 1. a rack;

[0049] 2. a hollow three-jaw chuck;

[0050] 3. a moving seat;

[0051] 4. a center frame; 41, a middle support arm; 42, a side support arm; 43, a support roller;

[0052] 5. an XYZ three-axis moving module;

[0053] 6. a milling assembly; 61, a base; 62, a mounting seat; 63, a first telescopic driving member; 64, a rotating cylinder; 65, a rotating adjusting cylinder; 651, a limiting protrusion; 66, a rotating adjusting seat; 661, a cylindrical groove; 662, a spiral limiting groove; 67, a connecting rod; 68, a milling cutter connecting member; 69, a milling cutter limiting seat; 691, a limiting groove; 610, a milling cutter body; 611, a second rotating driving mechanism; 6111, a driving motor; 6112, a first gear; 6113, a second gear; 612, a first bearing; 613, a second bearing; 614, a third bearing; 615, a second telescopic driving member;

[0054] 7. a large-sized cylindrical rotary workpiece. DETAILED DESCRIPTION

[0055] To make the technical content of the present application, the purposes and effects achieved more clear, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0056] Please refer to Figures 1 to 7 The embodiment of the present application relates to a high-precision cyclone milling machine tool, which comprises:

[0057] a rack 1;

[0058] a hollow three-jaw chuck 2, which is rotatably connected to the rack 1, and the axial direction of the hollow three-jaw chuck 2 is the X direction;

[0059] a first rotating driving mechanism, which is connected between the rack 1 and the hollow three-jaw chuck 2, and is used to drive the hollow three-jaw chuck 2 to rotate;

[0060] a moving seat 3, which is movably connected to the rack 1 along the X direction, and is located in the X direction of the three-jaw chuck;

[0061] a first linear driving mechanism, which is used to drive the moving seat 3 to move;

[0062] A center frame 4 is connected to the moving seat 3, the center frame 4 comprises a middle support arm 41 and side support arms 42 symmetrically distributed on both sides of the middle support arm 41 in Y direction, the middle support arm 41 and the side support arms 42 are both connected with support rollers 43 for abutting against the outer circumferential part of the workpiece;

[0063] An XYZ three-axis moving module 5 is connected to the rack 1, the XYZ three-axis moving module 5 is located at the X direction of the moving seat 3;

[0064] A milling assembly 6 comprises a base 61, a mounting seat 62, a first telescopic driving member 63, a rotating cylinder 64, a rotating adjusting cylinder 65, a rotating adjusting seat 66, a connecting rod 67, a milling cutter connecting member 68, a milling cutter limiting seat 69, a milling cutter body 610 and a second rotating driving mechanism 611;

[0065] The base 61 is connected to the XYZ three-axis moving module 5, and the mounting seat 62 is connected to the base 61;

[0066] One end of the first telescopic driving member 63 is connected to the mounting seat 62;

[0067] The rotating cylinder 64 is rotationally connected to the mounting seat 62 through a first bearing 612, the axis of the first telescopic driving member 63 coincides with the axis of the rotating cylinder 64, and the rotating adjusting cylinder 65 is coaxially rotationally connected to the other end of the first telescopic driving member 63 through a second bearing 613; the rotating adjusting cylinder 65 is coaxially arranged in the rotating cylinder 64, and the circumferential surface of the rotating adjusting cylinder 65 is provided with a limiting protrusion 651;

[0068] The rotating adjusting seat 66 is provided with a cylindrical groove 661 in sliding fit with the rotating adjusting cylinder 65, the inner wall of the cylindrical groove 661 is provided with a spiral limiting groove 662, the cylindrical groove 661 is coaxially and slidingly sleeved on the rotating adjusting cylinder 65, and the limiting protrusion 651 is located in the spiral limiting groove 662;

[0069] The rotating adjusting seat 66 and the rotating cylinder 64 are rotationally connected through a third bearing 614; the third bearing 614 is a one-way bearing;

[0070] A plurality of milling cutter limiting seats 69 are connected to the end of the rotating cylinder 64 in circumferential array, the milling cutter limiting seat 69 is provided with a limiting groove 691 for slidingly connecting the milling cutter body 610; the milling cutter body 610 is slidingly connected to the limiting groove 691, the inner side end of the milling cutter body 610 is connected to the milling cutter connecting member 68, one end of the connecting rod 67 is pivotally connected to the milling cutter connecting member 68, the other end is pivotally connected to an eccentric position of the end of the rotating adjusting seat 66, and the pivotally connected axes of the two ends of the connecting rod 67 are parallel to the axial direction of the rotating adjusting seat 66;

[0071] The second rotating driving mechanism 611 is connected to the mounting base 62, and the second rotating mechanism is in transmission connection with the rotating cylinder 64, and is used for driving the rotating cylinder 64 to rotate.

[0072] In the state that the second rotating mechanism drives the rotating cylinder 64 to rotate, the rotating cylinder 64 drives the rotating adjusting seat 66 to rotate synchronously.

[0073] With reference to Figure 1 A set of XYZ three-axis moving modules 5 can also be arranged on the reverse side of the hollow three-jaw chuck 2 in the X direction, and the XYZ three-axis moving modules 5 are also connected with the milling assembly 6, and are used for milling the reverse end of the large-sized cylindrical rotary workpiece 7 in the X direction.

[0074] In the above structure, the hollow three-jaw chuck 2 and the center frame 4 are both existing structures, and thus the specific internal structure and working principle will not be described in detail. The hollow three-jaw chuck 2 can center and clamp the outer wall of the large-sized cylindrical rotary workpiece 7, and the center frame 4 can rollingly center and position the large-sized cylindrical rotary workpiece 7, so that the rotating driving mechanism can drive the hollow three-jaw chuck 2 to rotate, and then drive the large-sized cylindrical rotary workpiece 7 to stably rotate along the axial direction.

[0075] In the above structure, since the third bearing 614 is a one-way bearing, when the second rotating driving mechanism 611 drives the rotating cylinder 64 to rotate, the rotating adjusting seat 66 on the inner side rotates synchronously with the rotating cylinder 64 due to the check action of the one-way bearing, that is, the rotating adjusting seat 66 does not rotate relative to the rotating cylinder 64. When the first telescopic driving member 63 is elongated, the limiting protruding part 651 slides in the spiral limiting groove 662, so that the rotating adjusting seat 66 rotates relative to the rotating cylinder 64 by a certain angle through the one-way bearing, thereby driving the milling cutter body 610 to move outward by a small distance along the milling cutter limiting seat 69 through the transmission of the connecting rod 67, so as to offset the wear of the milling cutter body 610.

[0076] Preferably, the supporting roller 43 is a universal roller.

[0077] Preferably, the second rotating driving mechanism 611 comprises a driving motor 6111, a first gear 6112 and a second gear 6113. The driving motor 6111 is connected to the mounting base 62. The first gear 6112 is in transmission connection with the output shaft of the driving motor 6111. The second gear 6113 is coaxially sleeved on the outer wall of the rotating cylinder 64, and the first gear 6112 is engaged with the second gear 6113.

[0078] Preferably, the limiting groove 691 of the milling cutter limiting seat 69 is in the shape of a cuboid, and the side part of the milling cutter body 610 is in sliding fit with the limiting groove 691.

[0079] Preferably, the first telescopic driving member 63 is an electric telescopic cylinder.

[0080] Preferably, the mounting seat 62 is pivoted to the base 61, and further comprises a second telescopic driving member 615, one end of which is pivoted to the base 61 and the other end is pivoted to the mounting seat 62. The second telescopic driving member 615 is used to adjust the rotation angle of the mounting seat 62 relative to the base 61, so as to meet the milling machining requirements of various angles of the inner wall of the large cylindrical rotary workpiece 7.

[0081] Preferably, the second telescopic driving member 615 is an electric telescopic cylinder.

[0082] The present application also relates to a milling method of the high-precision cyclone milling machine tool, which comprises the following steps:

[0083] The first linear driving mechanism drives the moving seat 3 to move, and controls the middle support arm 41 and the side support arm 42 of the center frame 4 to move, so that each support roller 43 abuts against the outer wall of the large cylindrical rotary workpiece 7.

[0084] The XYZ three-axis moving module 5 drives the milling cutter body 610 of the milling assembly 6 to move to the position to be milled on the inner wall of the large cylindrical rotary workpiece 7.

[0085] The first linear driving mechanism drives the moving seat 3 to move, and controls the middle support arm 41 and the side support arm 42 of the center frame 4 to move, so that each support roller 43 abuts against the outer wall of the large cylindrical rotary workpiece 7.

[0086] The rotating driving mechanism drives the hollow three-jaw chuck 2 to rotate, thereby driving the large cylindrical rotary workpiece 7 to rotate, and the second rotating driving mechanism 611 drives the rotating cylinder 64 to rotate, thereby driving the milling cutter body 610 to rotate, so as to mill the inner wall of the large cylindrical rotary workpiece 7.

[0087] During the milling process, the XYZ three-axis moving module 5 is controlled to move along the X-axis at a feed rate, and the first linear driving mechanism is controlled to move the moving seat 3 along the X-axis at a synchronous feed rate, so that the milling cutter body 610 and each support roller 43 are always located in the same vertical plane.

[0088] According to the wear rate of the milling cutter body 610, the first telescopic driving member 63 is controlled to move in an elongated manner, so that the limiting protruding part 651 slides in the spiral limiting recess 662, the rotating adjusting seat 66 is driven to rotate in the opposite direction relative to the rotating cylinder 64, the connecting rod 67 drives the milling cutter body 610 to move outward along the limiting groove 691, so as to offset the wear of the milling cutter.

[0089] Preferably, the first telescopic drive 63 is controlled to extend and move according to the wear rate of the milling cutter body 610, so that the limiting protrusion 651 slides in the spiral limiting groove 662, drives the rotary adjusting seat 66 to rotate reversely relative to the rotary cylinder 64, and drives the connecting rod 67 to move the milling cutter body 610 outward along the limiting groove 691 to offset the wear of the milling cutter. Specifically, the first telescopic drive 63 is controlled to extend and move according to the wear rate of the milling cutter body 610, so that the limiting protrusion 651 slides in the spiral limiting groove 662, drives the rotary adjusting seat 66 to rotate reversely relative to the rotary cylinder 64, and drives the connecting rod 67 to move the milling cutter body 610 outward along the limiting groove 691 to offset the wear of the milling cutter.

[0090] By establishing a machine learning model, specifically a deep neural network model, taking the material property parameters, environmental parameters and milling parameters of the large cylindrical rotating workpiece 7 as input data and taking the wear rate of the milling cutter body as label data, the machine learning model is trained through multiple training samples; before milling, the material property parameters, environmental parameters and milling parameters of the large cylindrical rotating workpiece 7 are input into the trained machine learning model, and the corresponding wear rate value is output, the rate value of the first telescopic drive 63 is calculated according to the wear rate value of the milling cutter body 610, the first telescopic drive 63 is controlled to extend and move, so that the limiting protrusion 651 slides in the spiral limiting groove 662, drives the rotary adjusting seat 66 to rotate reversely relative to the rotary cylinder 64, and drives the connecting rod 67 to move the milling cutter body 610 outward along the limiting groove 691 to offset the wear of the milling cutter; the material property parameters include the material, hardness, thermal conductivity, elongation and surface roughness of the workpiece; the milling parameters include the speed, torque of the milling cutter body, the feed rate and milling depth of the milling cutter body; the environmental parameters include the environmental humidity and temperature.

[0091] Preferably, the mounting seat 62 is also connected with a laser sensor, such as Keyence LJ-V7300, which monitors and obtains the surface roughness of the workpiece milling site in real time according to a preset time interval, and inputs it into the machine learning model to update the input data of this parameter. The mounting seat 62 is also connected with a temperature sensor and a humidity sensor, which are used to monitor and obtain the environmental temperature and humidity near the workpiece milling site in real time. During the milling process of the milling cutter body 610 on the large cylindrical rotating workpiece 7, the environmental temperature and humidity are obtained at a preset interval and updated to the input data in real time, and a new wear rate value is output according to the updated data, so as to change the extension rate of the first telescopic drive 63.

[0092] Keyence LJ-V7300 is a non-contact surface roughness measuring device of Keyence (KEYENCE), and its detection process is mainly based on optical measurement technology. The surface micro profile is captured by laser scanning or optical interference technology, the change of reflected light signal is recorded by the sensor, and the average roughness value Ra‌ is automatically calculated by software.

[0093] Material property parameters are obtained from parameters disclosed in material specifications or tested before processing.

[0094] In the above embodiments, the workpiece material is a categorical variable that needs to be encoded, such as one-hot encoding. Hardness and thermal conductivity are numerical values that need to be normalized. Environmental temperature and humidity are also numerical values that need to be normalized. Tool parameters such as speed, torque, feed rate, and milling depth are also numerical values that need to be normalized. The loss function uses MSE to obtain a dataset of mapping relationships between different tool parameters and different environmental parameters under processing of different workpieces, where the corresponding tool wear rate is obtained by stopping after a predetermined time of processing, measuring the diameter of the tool, and using the formula (S1-S2) / 2t, where S1 is the diameter of the tool milling site before processing, S2 is the diameter of the tool milling site after processing, and t is the processing time during which the diameter of the tool milling site changes from S1 to S2.

[0095] The collected dataset is randomly divided into a training set, a validation set, and a test set.

[0096] The activation function is selected as ReLU, the loss function is MSE, the optimizer is Adam, the learning rate is 5e-4, and the weight decay is 0.01. The learning rate scheduling is configured as CosineAnnealingWarmRestarts, T_0=50, T_mult=1: L2 regularization is used to prevent overfitting. The validation set is used to monitor early stopping during training. If the validation set loss does not improve for 15 rounds, the training is terminated, and the best weights are restored.

[0097] In the obtained data, a cross feature can be added by multiplying the speed and feed rate in the milling processing parameters to obtain a new cross feature parameter.

[0098] The validation method uses cross-validation.

[0099] In the data preprocessing stage, the distribution characteristics, missing values, and abnormal values of the data are obtained, and data cleaning and conversion are performed.

[0100] In the above embodiments, the machine learning model is trained by taking the material property parameters, environmental parameters and milling machining parameters of the large cylindrical rotating workpiece 7 as input data and taking the wear rate of the milling cutter body 610 as label data; before milling machining, the material property parameters, environmental parameters and milling machining parameters of the large cylindrical rotating workpiece 7 are input into the trained machine learning model, and the corresponding wear rate value is output; the wear rate value of the milling cutter body is used to calculate the rate value of the extension movement of the first telescopic driving member 63, the first telescopic driving member 63 is controlled to extend and move, the limiting protruding part 651 slides in the spiral limiting groove 662, the rotating adjusting seat 66 is driven to rotate reversely relative to the rotating cylinder 64, the connecting rod 67 drives the milling cutter body 610 to move outward along the limiting groove 691, so as to offset the wear of the milling cutter; and the milling machining precision is further improved.

[0101] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field by using the content of the specification and drawings of the present application is also included in the patent protection scope of the present application.

Claims

1. A high-precision cyclone milling machine tool, characterized in that, include: frame; A hollow three-jaw chuck, which is rotatably connected to the frame, with the axial direction of the hollow three-jaw chuck being the X-direction; A first rotary drive mechanism is connected between the frame and the hollow three-jaw chuck, and is used to drive the hollow three-jaw chuck to rotate. A movable base, which is movably connected to the frame along the X direction, is located in the X direction of the three-jaw chuck; A first linear drive mechanism is used to drive the movable seat to move. A central frame is connected to a movable seat. The central frame includes a central support arm and side support arms symmetrically distributed on both sides of the central support arm in the Y direction. Support rollers for abutting against the outer circumference of the workpiece are connected to both the central support arm and the side support arms. The XYZ three-axis moving module is connected to the frame and is located in the X direction of the moving base. A milling assembly, comprising a base, a mounting base, a first telescopic drive component, a rotating cylinder, a rotating adjusting cylinder, a rotating adjusting seat, a connecting rod, a milling cutter connector, a milling cutter limiting seat, a milling cutter body, and a second rotating drive mechanism; The base is connected to the XYZ three-axis moving module, and the mounting base is connected to the base; One end of the first telescopic drive component is connected to the mounting base; The rotating cylinder is rotatably connected to the mounting base via a first bearing. The axis of the first telescopic drive component coincides with the axis of the rotating cylinder. The rotating adjustment cylinder is coaxially rotatably connected to the other end of the first telescopic drive component via a second bearing. The rotating adjustment cylinder is coaxially arranged inside the rotating cylinder, and a limiting protrusion is provided on the circumferential surface of the rotating adjustment cylinder. The rotary adjustment seat is provided with a cylindrical groove that slides with the rotary adjustment cylinder. The inner wall of the cylindrical groove is provided with a spiral limiting groove. The cylindrical groove is coaxially slidably sleeved on the rotary adjustment cylinder, and the limiting protrusion is located in the spiral limiting groove. The rotary adjustment seat and the rotary cylinder are rotatably connected by a third bearing; the third bearing is a one-way bearing. When the second rotary drive mechanism drives the rotary cylinder to rotate, the inner rotary adjustment seat rotates synchronously due to the check function of the one-way bearing. Multiple milling cutter limit seats are connected to the end of the rotating cylinder in a circumferential array. The milling cutter limit seats are provided with limit grooves for sliding connection of the milling cutter body. The milling cutter body is slidably connected to the limit grooves. The inner end of the milling cutter body is connected to the milling cutter connector. One end of the connecting rod is pivotally connected to the milling cutter connector, and the other end is pivotally connected to the eccentric position at the end of the rotary adjustment seat. The two ends of the connecting rod are pivotally connected with the axis parallel to the axis of the rotary adjustment seat. The second rotary drive mechanism is connected to the mounting base, and the second rotary mechanism is connected to the rotary cylinder drive to drive the rotary cylinder to rotate; With the second rotating mechanism driving the rotating cylinder to rotate, the rotating cylinder drives the rotating adjustment seat to rotate synchronously; The first telescopic drive component is extended and moved according to the wear rate of the milling cutter body, so that the limiting protrusion slides in the spiral limiting groove, which drives the rotary adjustment seat to rotate in the opposite direction relative to the rotary cylinder, so that the connecting rod drives the milling cutter body to move outward along the limiting groove to counteract the wear of the milling cutter.

2. The high-precision cyclone milling machine tool according to claim 1, characterized in that, The support rollers are omnidirectional rollers.

3. The high-precision cyclone milling machine tool according to claim 1, characterized in that, The second rotary drive mechanism includes a drive motor, a first gear, and a second gear. The drive motor is connected to the mounting base. The first gear is driven by the output shaft of the drive motor. The second gear is coaxially sleeved on the outer wall of the rotating cylinder. The first gear meshes with the second gear.

4. The high-precision cyclone milling machine tool according to claim 1, characterized in that, The limiting groove of the milling cutter limiting seat is rectangular, and the side of the milling cutter body slides in conjunction with the limiting groove.

5. The high-precision cyclone milling machine tool according to claim 1, characterized in that, The first telescopic drive component is an electric telescopic cylinder.

6. The high-precision cyclone milling machine tool according to claim 1, characterized in that, The mounting base is pivotally connected to the base and also includes a second telescopic drive member, one end of which is pivotally connected to the base and the other end of which is pivotally connected to the mounting base.

7. The high-precision cyclone milling machine tool according to claim 6, characterized in that, The second telescopic drive component is an electric telescopic cylinder.

8. The milling method of the high-precision cyclone milling machine tool according to any one of claims 1 to 7, characterized in that, Includes the following steps: The outer wall of a large cylindrical rotating workpiece near one end is clamped in a hollow three-jaw chuck for positioning. The first linear drive mechanism drives the moving seat to move and controls the movement of the central support arm and side support arm of the central frame, so that each support roller abuts against the outer wall of the large cylindrical rotating workpiece. The XYZ three-axis moving module is controlled to move the milling cutter body of the milling component to the part that needs to be milled and contacts the inner wall of the large cylindrical rotating workpiece. Control the first linear drive mechanism to move the moving seat, so that the center frame moves to the position where the milling cutter body is located; The first rotary drive mechanism is controlled to drive the hollow three-jaw chuck to rotate, thereby driving the large cylindrical rotary workpiece to rotate. The second rotary drive mechanism is controlled to drive the rotary cylinder to rotate, thereby driving the milling cutter body to rotate, and milling the inner wall of the large cylindrical rotary workpiece. During the milling process, the XYZ three-axis moving module is controlled to move along the X-axis, while the first linear drive mechanism is controlled to drive the moving seat to move synchronously along the X-axis, so that the milling cutter body and each support roller are always in the same vertical plane.

9. The milling method of the high-precision cyclone milling machine tool according to claim 8, characterized in that, The method of controlling the extension and movement of the first telescopic drive component according to the wear rate of the milling cutter body, so that the limiting protrusion slides in the spiral limiting groove, drives the rotating adjustment seat to rotate in the opposite direction relative to the rotating cylinder, and causes the connecting rod to drive the milling cutter body to move outward along the limiting groove to counteract the wear of the milling cutter, specifically is as follows: A machine learning model is established using material properties, environmental parameters, and milling parameters of a large cylindrical rotating workpiece as input data, and the wear rate of the milling cutter body as label data. The model is trained using multiple training samples. Before milling, the material properties, environmental parameters, and milling parameters of the large cylindrical rotating workpiece are input into the trained machine learning model, which outputs the corresponding wear rate value. Based on the wear rate value of the milling cutter body, the extension rate of the first telescopic drive component is calculated, and the extension of the first telescopic drive component is controlled to make the limiting protrusion slide within the spiral limiting groove. This causes the rotating adjustment seat to rotate in the opposite direction relative to the rotating cylinder, and the connecting rod drives the milling cutter body to move outward along the limiting groove to counteract the wear of the milling cutter. The material properties include the workpiece's material, hardness, thermal conductivity, elongation, and surface roughness. The milling parameters include the milling cutter body's rotational speed, torque, feed rate, and depth of cut. The environmental parameters include ambient humidity and ambient temperature.

10. The milling method of the high-precision cyclone milling machine tool according to claim 9, characterized in that, The machine learning model is specifically a deep neural network model.

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