Rotary power head for multi-tool-bit turning and milling composite machine tool

Abstract

The invention belongs to the technical field of turning and milling equipment, and particularly relates to a rotary power head for a multi-tool-bit turning and milling composite machine tool, which comprises a case and a rotatable three-jaw chuck mounted on the case, and a scratch quantity acquisition module, a scrap quantity acquisition module and an execution mechanism are arranged beside the three-jaw chuck. The executing mechanism comprises a circular air spraying pipe located in front of the three-jaw chuck, and a plurality of air nozzles distributed in an annular array mode are arranged on the circumferential inner wall of the air spraying pipe. The scratch quantity acquisition module is used for detecting the scratch quantity of the workpiece surface in real time, and the chipping quantity acquisition module is used for detecting the chipping quantity accumulated on the workpiece surface in real time. By arranging the scratch amount collecting module and the chipping amount collecting module, the scratch amount and the chipping accumulation amount of the surface of a workpiece can be accurately detected in real time, the control module generates an evaluation coefficient according to collected data, compares the evaluation coefficient with a reference threshold value and intelligently controls the working state of the execution mechanism, and therefore chippings are treated in time, and the product quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of turning and milling equipment, and in particular to a rotary power head for a multi-tool turning and milling compound machine tool. Background Art

[0002] Turning and milling is an advanced cutting method that uses the combined motion of the milling cutter rotation and the workpiece rotation to achieve cutting of the workpiece, so that the workpiece meets the requirements in terms of shape accuracy, position accuracy, and machined surface integrity. In the field of mechanical processing, multi-head turning and milling machine tools are widely used in the processing of complex parts.

[0003] However, there are some problems with traditional milling machines during processing. For example, during the milling process, the debris particles generated by the processing will accumulate on the surface of the workpiece. If the debris is not cleaned in time, the metal debris particles will repeatedly squeeze the processed surface, which may cause scratches or tiny pits, affecting the dimensional accuracy and surface roughness. The cleaning mechanism set up by traditional equipment is generally a purge that is always in working state, which will cause the problem of high manufacturing costs. There is a lack of effective detection cleaning mechanism, and it is impossible to monitor the amount of scratches and debris in real time for intelligent processing. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a rotary power head for a multi-head turning and milling compound machine tool.

[0005] The present invention proposes a rotary power head for a multi-tool turning and milling compound machine tool, comprising a chassis and a rotatable three-jaw chuck mounted on the chassis, a scratch amount collection module, a debris amount collection module and an actuator are arranged next to the three-jaw chuck, the actuator comprising a circular air jet pipe located in front of the three-jaw chuck and capable of moving along the axial direction of the workpiece, the circumferential inner wall of the air jet pipe is provided with a plurality of air nozzles distributed in a circular array; the scratch amount collection module is used for real-time detection of the scratch amount on the workpiece surface, and the debris amount collection module is used for real-time detection of the debris amount accumulated on the workpiece surface; the workpiece is clamped and mounted on the three-jaw chuck, and the three-jaw chuck will drive the workpiece during the milling process The workpiece rotates, and the control module is used to receive the data collected by the scratch amount collection module and the debris amount collection module in real time, and conduct a comprehensive analysis, and then generate an evaluation coefficient, and compare the evaluation coefficient with a preset evaluation coefficient reference threshold to determine whether the amount of debris on the workpiece surface is within a reasonable range, and control the working state of the actuator according to the comparison result. If the amount of debris on the workpiece surface is not within a reasonable range, the actuator will start, and the air jet will move back and forth once along the axial direction of the workpiece, and blow air to the workpiece through the air nozzle to clean up the debris, thereby avoiding the accumulation of debris affecting the dimensional accuracy and surface roughness.

[0006] Preferably, the three-jaw chuck is fixed to one end of the main shaft, the main shaft is rotatably connected to the chassis, the other end of the main shaft is fixedly sleeved with a synchronous wheel 1, a main motor is fixed in the chassis, the output shaft of the main motor is fixedly connected to a synchronous wheel 2, and the synchronous wheel 2 and the synchronous wheel 1 are connected by a synchronous belt; after the main motor is started, the synchronous wheel 2 is driven to rotate through its output shaft, and then the synchronous wheel 2 drives the synchronous wheel 1 to rotate through the synchronous belt, and the synchronous wheel 1 will drive the three-jaw chuck to rotate through the main shaft, thereby driving the workpiece to rotate.

[0007] Preferably, a frame fixed to the chassis is provided in front of the three-jaw chuck, the scratch amount collection module is fixed on an inner wall on one side of the frame, the debris amount collection module is fixed on the top inner wall of the frame, and the control module is fixed on the chassis; in this way, the scratch amount collection module can be used to better detect the scratch amount on the workpiece surface, and the debris amount accumulated on the workpiece surface can be detected through the debris amount collection module.

[0008] Preferably, the jet pipe is connected to a bent pipe, an electromagnetic valve is installed on the bent pipe, a driving motor is fixed on one side of the frame, the output shaft of the driving motor is connected to a screw, a slide is threadedly connected to the screw, the slide passes through a sliding port on the side of the frame and is movably connected to the bent pipe; first, the external air source is connected to the bent pipe, and when cleaning debris, the driving motor and the electromagnetic valve will be started at the same time, so that the screw can be driven by the output shaft of the driving motor to rotate forward and reverse periodically, and then the slide can be driven to move back and forth along the direction of the sliding port, and the slide will synchronously drive the jet pipe to move through the bent pipe, and then the air source will enter the bent pipe and the jet pipe in turn and spray out from the air nozzle, so as to comprehensively clean the debris on the surface of the workpiece.

[0009] Preferably, a fixing frame located below the bent pipe is fixed to the inner wall of one side of the frame close to the bent pipe, and triangular blocks with staggered distribution are fixed to the inner walls of both sides of the fixing frame respectively, and a plurality of feeler rods capable of passing through the fixing frame are fixed to the bottom of the bent pipe; when the bent pipe moves back and forth, the feeler rods below the bent pipe will enter the fixing frame in sequence, and when the feeler rod contacts the first block, the feeler rod will be pushed by the block to cause the bent pipe to rotate to one side, and similarly, when the feeler rod contacts the second block, the feeler rod will be pushed by the block to cause the bent pipe to rotate to the other side, so that the air jet pipe rotates back and forth with the bent pipe, thereby increasing the blowing range of the air nozzle.

[0010] Preferably, the bent pipe is rotatably connected to the slide, and a limit frame is fixed on one side of the slide, a limit rod is fixed on the circumferential outer wall of the bent pipe, and the limit rod and the limit frame are slidingly matched; in this way, the rotation angle of the bent pipe can be limited by the sliding match between the limit rod and the limit frame, so that the bent pipe can rotate back and forth stably and continuously.

[0011] Preferably, the calculation formula for the standardized processing of the debris amount (C) is:

[0012]

[0013] Among them, C max : The maximum allowable amount of debris calibrated by the experiment.

[0014] Preferably, the scratch amount (S) standardization calculation formula is:

[0015]

[0016] Among them, S max : The maximum allowable scratch amount determined by the experiment.

[0017] Preferably, the evaluation coefficient calculation formula is:

[0018] K=αC′+βS′

[0019] Among them, α, β: weight coefficients, α+β=1, reference threshold: K threshold .

[0020] Preferably, the control logic of the control module for the working state of the actuator according to the comparison result is as follows:

[0021] If K ≥ K threshold , start the actuator, the blowing time is T = T base (K-0.5);

[0022] If K <K threshold : The actuator enters sleep mode.

[0023] Compared with the prior art, the present invention provides a rotary power head for a multi-head turning and milling compound machine tool, which has the following beneficial effects:

[0024] 1. A rotary power head for a multi-head turning and milling machine tool can accurately detect the amount of scratches and debris accumulation on the workpiece surface in real time by setting a scratch amount collection module and a debris amount collection module. The control module generates an evaluation coefficient based on the collected data and compares it with the reference threshold value to intelligently control the working state of the actuator, so as to handle the debris in time and ensure product quality.

[0025] 2. A rotary power head for a multi-head turning and milling machine tool. When the amount of debris is detected to be beyond a reasonable range, the actuator is activated, the jet pipe moves along the axis of the workpiece and blows air through the air nozzle to clean the debris. At the same time, through the synergistic effect of the bent pipe, screw, slide and other structures, the jet pipe can move back and forth and rotate, greatly increasing the blowing range of the air nozzle, ensuring that the debris cleaning is more comprehensive and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The schematic diagram of a rotary power head for a multi-head turning and milling compound machine tool proposed by the present invention;

[0027] Figure 2 A schematic diagram of the first angle structure of a rotary power head for a multi-head turning and milling compound machine tool proposed by the present invention;

[0028] Figure 3 A second angle structural schematic diagram of a rotary power head for a multi-head turning and milling compound machine tool proposed by the present invention;

[0029] Figure 4 A schematic diagram of the internal structure of a chassis of a rotary power head for a multi-head turning and milling compound machine tool proposed by the present invention;

[0030] Figure 5 A schematic diagram of the frame structure of a rotary power head for a multi-head turning and milling compound machine tool proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the cross-sectional structure of a rotary power head for a multi-head turning and milling compound machine tool proposed by the present invention;

[0032] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at point A;

[0033] Figure 8 For the present invention Figure 6 A schematic diagram of the enlarged structure at B;

[0034] Fig. 9 The present invention provides a schematic diagram of a fixed frame structure of a rotary power head for a multi-head turning and milling compound machine tool.

[0035] In the figure: 1. chassis; 2. three-jaw chuck; 3. scratch quantity collection module; 4. debris quantity collection module; 5. air jet; 6. air nozzle; 7. control module; 8. frame; 9. main shaft; 10. synchronous wheel one; 11. main motor; 12. synchronous wheel two; 13. synchronous belt; 14. drive motor; 15. slide; 16. screw; 17. slide; 18. elbow; 19. limit rod; 20. limit frame; 21. solenoid valve; 22. fixed frame; 23. block; 24. touch rod. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position 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 a limitation on the present invention.

[0038] Reference Figure 1-Figure 9 A rotary power head for a multi-tool turning and milling compound machine tool comprises a chassis 1 and a rotatable three-jaw chuck 2 mounted on the chassis 1, a scratch amount collection module 3, a debris amount collection module 4 and an actuator are arranged beside the three-jaw chuck 2, the actuator comprises a circular air jet pipe 5 located in front of the three-jaw chuck 2 and capable of moving along the axial direction of a workpiece, and a plurality of air nozzles 6 distributed in a circular array are arranged on the circumferential inner wall of the air jet pipe 5;

[0039] The scratch amount collection module 3 is used to detect the scratch amount on the workpiece surface in real time, and the debris amount collection module 4 is used to detect the debris amount accumulated on the workpiece surface in real time;

[0040] The control module 7 receives the data collected by the scratch amount collection module 3 and the debris amount collection module 4 and generates an evaluation coefficient, compares it with a preset reference threshold, and controls the working state of the actuator according to the comparison result;

[0041] It should be noted that the scratch amount acquisition module 3 can be a laser surface scanner or a high-precision roughness meter or other equipment that can detect the amount of scratches on the workpiece surface in real time, the debris amount acquisition module 4 can be an optical sensor (such as an infrared reflection sensor) or an image analysis unit or other equipment that can detect the amount of debris accumulated on the workpiece surface in real time, and the control module 7 is an embedded controller (such as a PLC or an industrial PC) with an integrated data fusion algorithm. Therefore, the scratch amount acquisition module 3, the debris amount acquisition module 4 and the control module 7 are not specifically limited here and can be selected according to actual needs;

[0042] When in use, the workpiece is clamped and installed on the three-jaw chuck 2, and the three-jaw chuck 2 will drive the workpiece to rotate during the milling process, and the control module 7 is used to receive the data collected by the scratch amount collection module 3 and the debris amount collection module 4 in real time, and perform comprehensive analysis, and then generate an evaluation coefficient, and compare the evaluation coefficient with a preset evaluation coefficient reference threshold to determine whether the amount of debris on the workpiece surface is within a reasonable range, and control the working state of the actuator according to the comparison result. If the amount of debris on the workpiece surface is not within a reasonable range, the actuator will start, and the air jet 5 will move back and forth once along the axial direction of the workpiece, and blow air to the workpiece through the air nozzle 6 to clean up the debris, thereby avoiding the accumulation of debris affecting the dimensional accuracy and surface roughness.

[0043] Among them, the three-jaw chuck 2 is fixed to one end of the main shaft 9, the main shaft 9 is rotatably connected to the chassis 1, the other end of the main shaft 9 is fixedly sleeved with a synchronous wheel 10, a main motor 11 is fixed in the chassis 1, the output shaft of the main motor 11 is fixedly connected to a synchronous wheel 2 12, and the synchronous wheel 2 12 and the synchronous wheel 10 are connected by a synchronous belt 13;

[0044] When in use, after the main motor 11 is started, the output shaft thereof drives the synchronous wheel 2 12 to rotate, and then the synchronous wheel 2 12 drives the synchronous wheel 1 10 to rotate through the synchronous belt 13, and the synchronous wheel 10 will drive the three-jaw chuck 2 to rotate through the main shaft 9, thereby driving the workpiece to rotate.

[0045] Among them, a frame 8 fixed to the chassis 1 is arranged in front of the three-jaw chuck 2. The structure of the frame 8 includes but is not limited to the structure shown in the attached drawings, and may also be a structure whose bottom is not closed (an opening is formed at the bottom), so that waste chips can be discharged in time and will not accumulate on the frame 8. The specific structure can be selected according to the required working environment. The scratch amount collection module 3 is fixed on the inner wall of one side of the frame 8, the debris amount collection module 4 is fixed on the top inner wall of the frame 8, and the control module 7 is fixed on the chassis 1;

[0046] When in use, the scratch amount collection module 3 can better detect the amount of scratches on the workpiece surface, and the debris amount collection module 4 can detect the amount of debris accumulated on the workpiece surface.

[0047] The jet pipe 5 is connected to a curved pipe 18, on which a solenoid valve 21 is installed. A driving motor 14 is fixed to one side of the frame 8. The output shaft of the driving motor 14 is connected to a screw 16, on which a slide 17 is threadedly connected. The slide 17 passes through a sliding opening 15 on the side of the frame 8 and is movably connected to the curved pipe 18.

[0048] When in use, first connect the external air source to the curved pipe 18. When cleaning debris, the drive motor 14 and the solenoid valve 21 will be started at the same time, so that the screw 16 can be driven by the output shaft of the drive motor 14 to rotate forward and reverse periodically, and then the slide 17 can be driven to move back and forth along the direction of the slide 15. The slide 17 will synchronously drive the jet pipe 5 to move through the curved pipe 18, and then the air source will enter the curved pipe 18 and the jet pipe 5 in turn and be sprayed out from the air nozzle 6, so as to comprehensively clean the debris on the surface of the workpiece.

[0049] Furthermore, a fixing frame 22 located below the bent pipe 18 is fixed to the inner wall of one side of the frame 8 close to the bent pipe 18, and triangular blocking blocks 23 with staggered distribution are fixed to the inner walls of both sides of the fixing frame 22, and a plurality of contact rods 24 capable of passing through the fixing frame 22 are fixed to the bottom of the bent pipe 18;

[0050] During use, when the curved pipe 18 moves back and forth, the feeler rod 24 below the curved pipe 18 will enter the fixed frame 22 in sequence. When the feeler rod 24 contacts the first block 23, the feeler rod 24 will be pushed by the block 23 to cause the curved pipe 18 to rotate to one side. Similarly, when the feeler rod 24 contacts the second block 23, the feeler rod 24 will be pushed by the block 23 to cause the curved pipe 18 to rotate to the other side, so that the air injection pipe 5 rotates back and forth with the curved pipe 18, thereby increasing the blowing range of the air nozzle 6.

[0051] The curved tube 18 is rotatably connected to the slide 17, and a limit frame 20 is fixed on one side of the slide 17. A limit rod 19 is fixed on the circumferential outer wall of the curved tube 18, and the limit rod 19 and the limit frame 20 are slidably matched.

[0052] When in use, the rotation angle of the curved tube 18 can be limited by the sliding cooperation between the limiting rod 19 and the limiting frame 20, so that the curved tube 18 can be stably and continuously rotated back and forth.

[0053] It should be noted that the frame 8 and the annular jet tube 5 are both arranged at the front end of the three-jaw chuck 2. Although this area is the working area of ​​the cutting tool, the drawings of this application do not represent the actual size and distance relationship. The technical solution of this application can avoid interference problems by specifically designing the dimensions of the frame 8 and the annular jet tube 5.

[0054] In another embodiment, through the cooperation between the scratch amount collection module 3, the debris amount collection module 4, the control module 7 and the actuator, the control logic of intelligently cleaning the debris on the workpiece surface is as follows:

[0055] 1. Data collection and standardization:

[0056] Debris volume (C): The optical sensor outputs a current signal, which is calibrated and converted into a debris density value C (g / cm 2 );

[0057] Scratch density (S): The laser scanner calculates the scratch density S (scratch / cm) by the change of surface reflection intensity. 2 );

[0058] The calculation formula for standardization is:

[0059]

[0060] Among them C max ,S max : The maximum allowable amount of debris and scratches calibrated by the experiment, C max : Determined by the material processing characteristics, such as the upper limit of loose packing density of aluminum chips; S max:Set according to the surface roughness requirements of the workpiece (such as Ra≤1.6μm corresponds to the scratch density limit).

[0061] 2. The calculation formula of the evaluation coefficient is:

[0062] K=αC′+βS′

[0063] α, β weight coefficient: α+β=1, when the debris is affected first, α=0.7, β=0.3

[0064] Trigger threshold: K threshold =0.6.

[0065] 3. Execution decision: If K ≥ K threshold , start the actuator, the blowing time is T = T base ·(K-0.5)(T base =5s);

[0066] If K <K threshold : The actuator enters sleep mode.

[0067] Anti-shake mechanism: It is triggered only after three consecutive detections of K≥0.6 to avoid false operation.

[0068] T: Dynamically adjust the blowing time to avoid excessive cleaning and waste of air.

[0069] In addition, the collection method and specific calculation process of the debris volume (C) include but are not limited to the following two:

[0070] 1. Optical sensor method (infrared reflection type)

[0071] The calculation formula is:

[0072] C=k·(V clean -V current )

[0073] Among them, V clean : The reference voltage value of the sensor output when there is no debris (unit: V), V current : The current detected sensor output voltage value (unit: V). k: Calibration coefficient (unit: g / (cm 2 V)), determined experimentally (e.g., measuring the voltage difference when the amount of debris is known and fitting a linear relationship).

[0074] Physical meaning: Debris accumulation causes the intensity of reflected light to decrease, and the voltage difference is proportional to the amount of debris.

[0075] 2. Image analysis

[0076] Calculation formula:

[0077]

[0078] Among them, A debris,i : The pixel area of ​​the i-th debris region in the image (unit: pixel 2 ), A total :Total pixel area of ​​the detection area (unit: pixel 2 ), N: the number of debris areas detected.

[0079] Technical process:

[0080] (1) Image preprocessing: grayscale, binarization (threshold segmentation);

[0081] (2) Morphological filtering: remove noise points;

[0082] (3) Connected domain analysis: Statistical analysis of the area of ​​the debris region.

[0083] The collection method and specific calculation process of the scratch amount (S) include but are not limited to the following two:

[0084] Detection method: Detect scratch density using a laser surface scanner or a high-precision roughness meter.

[0085] 1. Laser scanning method

[0086] formula:

[0087]

[0088] Among them, N scratch : Number of scratches detected by laser scanning (unit: scratches), A scan :Laser scanning area (unit: cm 2 ).

[0089] Technical process:

[0090] 1. Laser scanning to obtain 3D point cloud data of the surface; 2. Curvature analysis: Identify local depressions (curvature mutation points) caused by scratches; 3. Threshold determination: Depth exceeds d th (such as 0.01mm) is counted as a scratch.

[0091] 2. Surface roughness tester method

[0092] formula:

[0093]

[0094] Among them, L scratch,i : length of the i-th scratch (unit: mm), A measure : Measurement area (unit: cm 2 ), M: number of scratches.

[0095] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rotary power head for a multi-head turning and milling machine tool, comprising a chassis (1) and a rotatable three-jaw chuck (2) mounted on the chassis (1), characterized in that: A scratch amount collection module (3), a debris amount collection module (4) and an actuator are arranged beside the three-jaw chuck (2), the actuator comprising a circular air jet pipe (5) located in front of the three-jaw chuck (2) and capable of moving along the axial direction of the workpiece, and a plurality of air nozzles (6) distributed in a circular array are arranged on the circumferential inner wall of the air jet pipe (5); The scratch amount collection module (3) is used to detect the scratch amount on the workpiece surface in real time, and the debris amount collection module (4) is used to detect the debris amount accumulated on the workpiece surface in real time; The control module (7) receives the data collected by the scratch quantity collection module (3) and the debris quantity collection module (4) and generates an evaluation coefficient, compares it with a preset reference threshold value, and controls the working state of the actuator according to the comparison result.

2. A rotary power head for a multi-head turning and milling machine tool according to claim 1, characterized in that: The three-jaw chuck (2) is fixed to one end of a main shaft (9), the main shaft (9) is rotatably connected to the chassis (1), the other end of the main shaft (9) is fixedly sleeved with a synchronous wheel 1 (10), a main motor (11) is fixed in the chassis (1), the output shaft of the main motor (11) is fixedly connected to a synchronous wheel 2 (12), and the synchronous wheel 2 (12) and the synchronous wheel 1 (10) are connected via a synchronous belt (13).

3. The rotary power head for a multi-head turning and milling machine tool according to claim 1, characterized in that: A frame (8) fixed to the chassis (1) is arranged in front of the three-jaw chuck (2); the scratch amount collection module (3) is fixed to an inner wall on one side of the frame (8); the debris amount collection module (4) is fixed to the top inner wall of the frame (8); and the control module (7) is fixed to the chassis (1).

4. The rotary power head for a multi-head turning and milling machine tool according to claim 1, characterized in that: The jet pipe (5) is connected to a curved pipe (18), and a solenoid valve (21) is installed on the curved pipe (18). A drive motor (14) is fixed to one side of the frame (8), and the output shaft of the drive motor (14) is connected to a screw rod (16). A slide bracket (17) is threadedly connected to the screw rod (16), and the slide bracket (17) passes through a sliding opening (15) on the side of the frame (8) and is movably connected to the curved pipe (18).

5. The rotary power head for a multi-head turning and milling machine tool according to claim 4, characterized in that: A fixing frame (22) located below the bent pipe (18) is fixed to the inner wall of one side of the frame (8) close to the bent pipe (18), triangular blocking blocks (23) distributed in a displaced manner are fixed to the inner walls of both sides of the fixing frame (22), and a plurality of touch rods (24) capable of passing through the fixing frame (22) are fixed to the bottom of the bent pipe (18).

6. The rotary power head for a multi-head turning and milling machine tool according to claim 4, characterized in that: The curved tube (18) is rotatably connected to the slide (17), a limiting frame (20) is fixed on one side of the slide (17), a limiting rod (19) is fixed on the circumferential outer wall of the curved tube (18), and the limiting rod (19) and the limiting frame (20) are slidably matched.

7. The rotary power head for a multi-head turning and milling machine tool according to claim 1, characterized in that: The calculation formula for the standardized processing of the debris amount (C) is: Among them, C max : The maximum allowable amount of debris calibrated by the experiment.

8. The rotary power head for a multi-head turning and milling machine tool according to claim 7, characterized in that: The scratch amount (S) is calculated by standardization: Among them, S max : The maximum allowable scratch amount determined by the experiment.

9. The rotary power head for a multi-head turning and milling machine tool according to claim 8, characterized in that: The evaluation coefficient calculation formula is: K=α C′+β S′ Among them, α, β: weight coefficients, α+β=1, reference threshold: K threshold .

10. A rotary power head for a multi-head turning and milling machine tool according to claim 9, characterized in that: The control logic of the control module (7) for the working state of the actuator according to the comparison result is as follows: If K ≥ K threshold , start the actuator, the blowing time is T = T base (K-0.5); If K <K threshold : The actuator enters sleep mode.

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