Copper pipe cutting equipment and method for refrigeration air conditioner machining

Abstract

The invention is suitable for the technical field of copper pipe cutting, and provides a copper pipe cutting device and method for refrigeration air conditioner machining, the copper pipe cutting device for refrigeration air conditioner machining comprises a workbench, a limiting seat is arranged on the workbench, and clamping mechanisms used for fixing a copper pipe are arranged on the two sides of the limiting seat; the workbench is fixedly connected with a supporting frame, the supporting frame is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a fixing frame, the fixing frame is connected with a limiting mechanism, and the limiting mechanism can vertically limit a copper pipe; buffering assemblies are fixedly connected to the two ends of the electric telescopic rod correspondingly, and a cutting assembly is horizontally limited between the two buffering assemblies. According to the method, the regulation and control analysis model fuses vibratology, thermodynamics and the material processing principle, real-time quantitative prediction of'cutting precision 'which cannot be directly observed is achieved through measurable parameters, and a theoretical core is provided for intelligent manufacturing.

Description

Technical Field

[0001] The invention belongs to the technical field of copper tube cutting, and in particular relates to a copper tube cutting device and method for refrigeration and air conditioning processing. Background Art

[0002] In the field of refrigeration and air conditioning copper tube processing, traditional cutting equipment has the following technical defects:

[0003] 1. Severe vibration interference: During the cutting process, the tool and the copper tube generate high-frequency vibration due to rigid contact, resulting in burrs, deflection or deformation of the cut. In particular, thin-walled copper tubes are more likely to reduce dimensional accuracy due to resonance;

[0004] Second, insufficient heat dissipation capacity: During continuous cutting, the tool temperature rises, the material stiffness decreases, aggravating tool wear and cutting trajectory deviation. Conventional coolant injection methods are prone to secondary vibration due to impact force.

[0005] Third, the control strategy is single: Existing equipment mostly relies on mechanical limits with fixed parameters or simple temperature monitoring, and cannot coordinate and control vibration suppression, cooling intensity and clamping force in real time, making it difficult to cope with dynamic processing conditions.

[0006] Therefore, there is an urgent need to develop a cutting solution that integrates multi-physics field perception and active control to solve the problem of accuracy degradation under the action of vibration-temperature coupling. Summary of the Invention

[0007] The purpose of the embodiments of the present invention is to provide a copper tube cutting device and method for refrigeration and air conditioning processing, aiming to solve the problem that traditional cutting equipment mostly relies on mechanical limits with fixed parameters or simple temperature monitoring, cannot coordinate and control vibration suppression, cooling intensity and clamping force in real time, and is difficult to cope with dynamic processing conditions.

[0008] The present invention is achieved as follows: a copper tube cutting device for refrigeration and air conditioning processing includes a workbench, a limit seat is provided on the workbench, and clamping mechanisms for fixing the copper tube are provided on both sides of the limit seat. The workbench is fixedly connected to a support frame, and the support frame is fixedly connected to an electric telescopic rod. The telescopic end of the electric telescopic rod is fixedly connected to a fixing frame, and the fixing frame is connected to a limit mechanism. The limit mechanism can limit the vertical position of the copper tube;

[0009] Both ends of the electric telescopic rod are fixedly connected to a buffer assembly, a cutting assembly is horizontally limited between the two buffer assemblies, and the two buffer assemblies can elastically limit the cutting assembly. A flow control assembly is provided between the two buffer assemblies, which can circulate the coolant in the two buffer assemblies. The two buffer assemblies are commonly connected to a vibration reduction assembly, and the vibration reduction assembly can spray cooling on the cutting assembly;

[0010] The cutting precision control system can regulate the clamping mechanism, vibration reduction component, flow control component and limit mechanism according to the vibration information of the cutting component and the copper tube during cutting and the temperature information of the cutting component, thereby improving the cutting precision of the copper tube.

[0011] According to a further technical solution, the buffer assembly includes a fixed sleeve, a slide plate and a spring;

[0012] Both ends of the fixing frame are fixedly connected to a fixing sleeve, and a slide is slidably and sealedly connected to the fixing sleeve. The cavity between the slide and the fixing sleeve is filled with coolant, and a spring is connected between the slide and the inner end surface of the fixing sleeve. The two ends of the cutting assembly are respectively connected to the two slides.

[0013] According to a further technical solution, the flow control assembly includes a conduit, a No. 3 one-way valve, and a No. 4 one-way valve;

[0014] Two conduits are connected between the two fixed sleeves, and a No. 3 one-way valve and a No. 4 one-way valve with opposite conducting directions are respectively provided on the two conduits.

[0015] According to a further technical solution, the vibration reduction assembly includes a water pump, a No. 1 hose, a No. 2 hose, and a No. 1 one-way valve;

[0016] The support frame is fixedly connected to a water pump, and a No. 1 hose is connected between the water pump and the two fixed sleeves. A No. 1 one-way valve that is unidirectionally conductive toward the fixed sleeve is provided between the No. 1 hose and the fixed sleeve. One end of the fixed sleeve is fixedly connected to a connecting sleeve, and a No. 2 hose is connected between the connecting sleeve and the fixed sleeve. A No. 2 one-way valve that is unidirectionally conductive toward the connecting sleeve is provided on the No. 2 hose. The connecting sleeve is rotatably connected to a rotating seat, and the rotating seat is connected to an annular rubber bag, which is communicated with the connecting sleeve through the rotating seat, and a plurality of water spray holes are provided on the annular rubber bag.

[0017] According to a further technical solution, the limiting mechanism includes a connecting seat, a push rod, a sliding sleeve, a one-way air valve and a pressure plate;

[0018] The fixing frame is fixedly connected to the connecting seat, the connecting seat is fixedly connected to the push rod, the push rod slides vertically and is sealed with a sliding sleeve, a one-way air valve for outward one-way conduction is provided near the bottom of the sliding sleeve, and a pressure plate is fixedly connected to the bottom of the sliding sleeve.

[0019] A further technical solution is that the cutting assembly includes a cutter disc, a rotating shaft and a No. 2 motor. The rotating shaft is fixedly connected to the middle of the cutter disc, one end of the rotating shaft is fixedly connected to the No. 2 motor, the No. 2 motor is fixedly connected to a skateboard, and the other end of the rotating shaft is rotatably connected to another skateboard.

[0020] According to a further technical solution, the clamping mechanism includes a first motor, a threaded rod, a sliding seat and a clamp;

[0021] The two sides of the limit seat are respectively slidably connected to a sliding seat, the bottom of the workbench is fixedly connected to motor No. 1, the output shafts at both ends of motor No. 1 are respectively fixedly connected to threaded rods with opposite spiral directions, each threaded rod is threadedly connected to a sliding seat, and the sliding seats are fixedly connected to a clamp.

[0022] A further technical solution is that the cutting precision control system includes:

[0023] The monitoring module includes a first vibration sensor, a second vibration sensor, and a temperature sensor. The first vibration sensor is connected to the cutting assembly, the second vibration sensor is arranged on the contact surface between the clamping mechanism and the copper tube, and the temperature sensor is arranged on the cutting assembly.

[0024] A vibration assessment module, which constructs a vibration assessment model based on the vibration frequency information of the cutting component and the vibration frequency information of the copper tube and outputs a vibration assessment coefficient;

[0025] The control analysis module constructs a control analysis model based on the vibration evaluation coefficient and the temperature information of the temperature sensor, and outputs the control analysis coefficient. When the control analysis coefficient exceeds a threshold preset in the control analysis module, a judgment information is generated;

[0026] The control module regulates the clamping mechanism, the vibration reduction component, the flow control component and the limit mechanism according to the judgment information of the regulation and analysis module.

[0027] In a further technical solution, the vibration assessment model is:

[0028]

[0029] Where V is the vibration influence coefficient (dimensionless), which represents the comprehensive influence of vibration on cutting accuracy. t is the real-time vibration frequency of the cutting component, indicating the instantaneous vibration frequency of the tool during the cutting process; f c is the real-time vibration frequency of the copper tube, indicating the instantaneous vibration frequency of the copper tube during the cutting process; k v is the vibration impact proportional factor (dimensionless), which indicates the overall sensitivity of frequency mismatch to vibration. This parameter is calibrated through experiments or production experience and satisfies k v >0; η is the vibration influence index (dimensionless), which is used to adjust the nonlinear degree of the frequency difference. When η=1, the model is linear. When η>1, large frequency difference is emphasized. η≥1, the value of η is determined by production experience.

[0030] In a further technical solution, the regulation analysis model is:

[0031]

[0032] Among them, C is the cutting accuracy judgment coefficient (dimensionless), which indicates the overall deviation degree of cutting accuracy. The larger the value, the worse the accuracy. T is the real-time temperature of the cutting component, which indicates the instantaneous temperature of the cutting component during the cutting process. β is the vibration influence weight (dimensionless), which indicates the contribution weight of vibration to cutting accuracy. It satisfies β>0 and is determined through experiments or production experience. γ is the temperature influence coefficient, which indicates the sensitivity of temperature change to cutting accuracy. γ>0 (increased temperature reduces cutting accuracy). T ref is the reference temperature, which represents the temperature of the cutting component under ideal cutting conditions, satisfying T ref ≥0, determined by actual production experience.

[0033] A method for cutting copper tubes for refrigeration and air conditioning processing, applied to the above-mentioned copper tube cutting equipment for refrigeration and air conditioning processing, comprises the following steps:

[0034] S1: Place the copper tube on the limit seat, start the clamping mechanism to position the copper tube, and then the electric telescopic rod drives the cutting assembly and the limit mechanism to move downward. The limit mechanism contacts the copper tube in advance, thereby further positioning the copper tube;

[0035] S2: The cutting assembly cuts the copper tube. According to the vibration information of the cutting assembly and the copper tube during cutting and the temperature information of the cutting assembly, the cutting precision control system can regulate the clamping mechanism, the vibration reduction assembly, the flow control assembly and the limit mechanism.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] Multi-stage coordinated vibration reduction system: buffer component + flow control component: through the combination of spring and hydraulic damping (slide plate / coolant), the lateral impact force of the cutting component is converted into elastic potential energy and hydraulic pressure; the flow control component guides the coolant to circulate between the fixed sleeves to achieve active dissipation of vibration energy; dynamic pressure regulation of the limit mechanism: the limit mechanism adaptively adjusts the downward pressure of the copper tube according to the set value of the one-way air valve to directly suppress the vibration of the workpiece.

[0038] Integration of intelligent temperature control and vibration suppression: Annular spray cooling innovation: The annular rubber bladder of the vibration damping component fits the rotating cutter disc and sprays evenly, expanding the heat dissipation area while avoiding coolant impact disturbance; its hydraulic pressure can enhance the lateral stability of the tool.

[0039] The clamping mechanism uses a two-way reverse-threaded rod to drive the clamp to achieve rapid centering and positioning of the copper tube, and the clamping force can be dynamically enhanced with the vibration frequency; the flow control component is linked with the vibration reduction component, and the valve flow area is automatically reduced during high-frequency vibration to strengthen the rigid limit. The high-temperature working condition switches to closed-loop cooling mode to ensure continuous cutting stability.

[0040] The control and analysis model integrates vibration science, thermodynamics and material processing principles, and realizes real-time quantitative prediction of the "cutting accuracy" that cannot be directly observed through measurable parameters, providing a theoretical core for intelligent manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the present invention;

[0042] Figure 2 Schematic diagram of the structure of the clamping mechanism of the present invention;

[0043] Figure 3 Schematic diagram of the structure of the limiting mechanism of the present invention;

[0044] Figure 4 Schematic diagram of the structure of the flow control component of the present invention;

[0045] Figure 5 Schematic diagram of the connection between the vibration damping component and the buffer component in the present invention;

[0046] Figure 6 Schematic diagram of the structure of the buffer assembly in the present invention.

[0047] In the attached figure: 1. workbench; 2. limit seat; 3. clamping mechanism; 31. No. 1 motor; 32. threaded rod; 33. sliding seat; 34. clamp; 4. fixed frame; 5. cutting assembly; 51. cutter head; 52. rotating shaft; 53. No. 2 motor; 6. buffer assembly; 61. fixed sleeve; 62. slide plate; 63. spring; 7. vibration reduction assembly; 71. water pump; 72. No. 1 hose; 73. No. 2 hose; 74. No. 1 one-way valve; 75. connecting sleeve; 76. rotating seat; 77. annular rubber bag; 78. No. 2 one-way valve; 8. flow control assembly; 81. catheter; 82. No. 3 one-way valve; 83. No. 4 one-way valve; 9. limit mechanism; 91. connecting seat; 92. push rod; 93. sliding sleeve; 94. one-way air valve; 95. pressure plate; 10. support frame; 11. electric telescopic rod. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0050] like Figures 1-6As shown, a copper tube cutting device for refrigeration and air conditioning processing provided by one embodiment of the present invention includes a workbench 1, a limit seat 2 is provided on the workbench 1, and clamping mechanisms 3 for fixing the copper tube are provided on both sides of the limit seat 2. The workbench 1 is fixedly connected to a support frame 10, and the support frame 10 is fixedly connected to an electric telescopic rod 11. The telescopic end of the electric telescopic rod 11 is fixedly connected to a fixing frame 4, and the fixing frame 4 is connected to a limit mechanism 9. The limit mechanism 9 can limit the vertical position of the copper tube;

[0051] Both ends of the electric telescopic rod 11 are fixedly connected to a buffer assembly 6, a cutting assembly 5 is horizontally limited between the two buffer assemblies 6, and the two buffer assemblies 6 can elastically limit the cutting assembly 5. A flow control assembly 8 is provided between the two buffer assemblies 6 to circulate the coolant in the two buffer assemblies 6. The two buffer assemblies 6 are commonly connected to a vibration reduction assembly 7, and the vibration reduction assembly 7 can spray cooling on the cutting assembly 5;

[0052] The cutting precision control system can regulate the clamping mechanism 3, the vibration reduction component 7, the flow control component 8 and the limiting mechanism 9 according to the vibration information of the cutting component 5 and the copper tube during cutting and the temperature information of the cutting component 5, thereby improving the cutting precision of the copper tube.

[0053] A method for cutting copper tubes for refrigeration and air conditioning processing, applied to the copper tube cutting equipment for refrigeration and air conditioning processing of the above embodiment, comprises the following steps:

[0054] S1: Place the copper tube on the limiting seat 2, activate the clamping mechanism 3 to position the copper tube, then the electric telescopic rod 11 drives the cutting assembly 5 and the limiting mechanism 9 to move downward. The limiting mechanism 9 contacts the copper tube in advance, thereby further positioning the copper tube, and then the cutting assembly 5 cuts the copper tube;

[0055] S2: Based on the vibration information of the cutting component 5 and the copper tube during cutting and the temperature information of the cutting component 5, the cutting accuracy control system can regulate the clamping mechanism 3, the vibration reduction component 7, the flow control component 8 and the limiting mechanism 9, thereby improving the cutting accuracy of the copper tube (during the cutting process, the copper tube and the cutting component 5 will vibrate, resulting in reduced cutting accuracy, and during continuous cutting, the temperature of the cutting component 5 will also rise. After the temperature of the cutting component 5 rises, the stiffness decreases, which will further affect the cutting accuracy of the copper tube).

[0056] like Figure 6 As shown in FIG. 1 , as a preferred embodiment of the present invention, the buffer assembly 6 includes a fixed sleeve 61 , a slide plate 62 and a spring 63 ;

[0057] Both ends of the fixing frame 4 are fixedly connected to a fixing sleeve 61, and a slide plate 62 is slidably and sealedly connected to the fixing sleeve 61. The cavity between the slide plate 62 and the fixing sleeve 61 is filled with coolant, and a spring 63 is connected between the slide plate 62 and the inner end surface of the fixing sleeve 61. The two ends of the cutting assembly 5 are respectively connected to the two slide plates 62.

[0058] In this embodiment, the spring 63 elastically limits the cutting assembly 5 by pushing the slide plate 62, thereby preventing the cutting assembly 5 from being rigidly damaged during the cutting process. During this process, the flow control assembly 8 can reduce the vibration force absorbed by the clamping mechanism 3.

[0059] like Figure 4 and Figure 5 As shown, as a preferred embodiment of the present invention, the flow control component 8 includes a conduit 81, a No. 3 one-way valve 82 and a No. 4 one-way valve 83;

[0060] Two conduits 81 are connected between the two fixed sleeves 61 , and a No. 3 one-way valve 82 and a No. 4 one-way valve 83 with opposite conducting directions are respectively provided on the two conduits 81 .

[0061] In this embodiment, when the cutting assembly 5 vibrates to the right, the slide 62 in the right fixed sleeve 61 squeezes the spring 63. At this time, the No. 3 one-way valve 82 is turned on, and the coolant in the fixed sleeve 61 flows unidirectionally to the left fixed sleeve 61 through the conduit 81. In this process, the impact force of the cutting assembly 5 to the right is converted into the elasticity of the spring 63 and the liquid pressure on the coolant, thereby providing vibration reduction protection for the cutting assembly 5; similarly, when the cutting assembly 5 vibrates to the left, the spring 63 and the coolant on the left can also provide buffering protection for the cutting assembly 5.

[0062] like Figure 4 、 Figure 5 and Figure 6 As shown, as a preferred embodiment of the present invention, the vibration reduction assembly 7 includes a water pump 71, a No. 1 hose 72, a No. 2 hose 73 and a No. 1 one-way valve 74;

[0063] The support frame 10 is fixedly connected to a water pump 71, and a No. 1 hose 72 is connected between the water pump 71 and the two fixed sleeves 61. A No. 1 one-way valve 74 is provided between the No. 1 hose 72 and the fixed sleeve 61, which is unidirectionally conducted toward the fixed sleeve 61. One end of the fixed sleeve 61 is fixedly connected to a connecting sleeve 75, and a No. 2 hose 73 is connected between the connecting sleeve 75 and the fixed sleeve 61. A No. 2 one-way valve 78 is provided on the No. 2 hose 73, which is unidirectionally conducted toward the connecting sleeve 75. The connecting sleeve 75 is rotatably connected to a rotating seat 76, and the rotating seat 76 is connected to an annular rubber bag 77. The annular rubber bag 77 is conducted with the connecting sleeve 75 through the rotating seat 76, and a plurality of water spray holes are provided on the annular rubber bag 77.

[0064] In this embodiment, when the vibration frequency of the cutting assembly 5 increases, the flow area of ​​the No. 1 one-way valve 74 and the No. 2 one-way valve 78 is controlled to decrease, which can increase the horizontal limiting strength of the cutting assembly 5 and avoid high-frequency vibration of the cutting tool 5.

[0065] When the temperature of the cutting assembly 5 is too high, the No. 3 one-way valve 82 and the No. 4 one-way valve 83 are started and closed. At this time, the No. 1 one-way valve 74 is connected to the No. 1 one-way valve 74, and the water pump 71 is started to inject coolant into the two fixed sleeves 61 through the No. 1 hose 72. The coolant in the two fixed sleeves 61 is injected into the connecting sleeve 75 through the No. 2 hose 73. The coolant in the two connecting sleeves 75 is filled into the two annular rubber bags 77. The two annular rubber bags 77 expand under the filling of coolant and contact the side surfaces on both sides of the cutting assembly 5. At this time, the rotating seat 76 can rotate with the cutting assembly 5. At the same time, due to the annular rubber The bag 77 is always in contact with the cutting assembly 5, so that the coolant can be evenly sprayed out from each water spray hole, and the coolant is dispersed outward from the center of the cutting assembly 5, which increases the heat dissipation area of ​​the cutting assembly 5, and at the same time avoids the coolant directly impacting the edge of the cutting assembly 5, causing the cutting of the cutting assembly 5 to increase instability; when the annular rubber bags 77 on both sides spray coolant outward at the same time, it can avoid the impact force of the coolant causing the instability of the cutting assembly 5 to increase, and the annular rubber bag 77 is always in contact with the cutting assembly 5, and the liquid pressure of the annular rubber bag 77 can further increase the stability of the cutting assembly 5.

[0066] like Figure 3 As shown in FIG. 1 , as a preferred embodiment of the present invention, the limiting mechanism 9 includes a connecting seat 91 , a push rod 92 , a sliding sleeve 93 , a one-way air valve 94 and a pressure plate 95 ;

[0067] The fixing frame 4 is fixedly connected to a connecting seat 91, and the connecting seat 91 is fixedly connected to a push rod 92. The push rod 92 slides vertically and is sealed to a sliding sleeve 93. A one-way air valve 94 that conducts outward in one direction is provided near the bottom of the sliding sleeve 93, and a pressure plate 95 is fixedly connected to the bottom of the sliding sleeve 93.

[0068] In this embodiment, when the fixing frame 4 moves downward, the fixing frame 4 drives the push rod 92 to slide in the sliding sleeve 93, and the atmospheric pressure in the sliding sleeve 93 increases. The one-way air valve 94 is set to open at a fixed atmospheric pressure. At this time, when the atmospheric pressure in the sliding sleeve 93 increases to a certain level, the one-way air valve 94 is opened. As the push rod 92 is pressed downward, the one-way air valve 94 drives the pressure plate 95 to limit the copper tube with a fixed pressure.

[0069] When it is necessary to increase the pressure on the copper tube and reduce the vibration of the copper tube, the atmospheric pressure setting value at which the one-way air valve 94 is opened is adjusted, thereby increasing the downward pressure of the pressure plate 95 on the copper tube and reducing the vibration frequency of the copper tube.

[0070] like Figure 5 and Figure 6 As shown, as a preferred embodiment of the present invention, the cutting assembly 5 includes a cutter disc 51, a rotating shaft 52 and a No. 2 motor 53. The rotating shaft 52 is fixedly connected to the middle of the cutter disc 51, one end of the rotating shaft 52 is fixedly connected to the No. 2 motor 53, the No. 2 motor 53 is fixedly connected to a slide 62, and the other end of the rotating shaft 52 is rotatably connected to another slide 62.

[0071] In this embodiment, the cutter disc 51 is used to cut the copper tube, and the second motor 53 drives the cutter disc 51 to rotate via the rotating shaft 52.

[0072] like Figure 2 As shown, as a preferred embodiment of the present invention, the clamping mechanism 3 includes a No. 1 motor 31, a threaded rod 32, a sliding seat 33 and a clamp 34;

[0073] The two sides of the limit seat 2 are respectively slidably connected with sliding seats 33, and the bottom of the workbench 1 is fixedly connected to the No. 1 motor 31. The output shafts at both ends of the No. 1 motor 31 are respectively fixedly connected with threaded rods 32 with opposite spiral directions. Each threaded rod 32 is threadedly connected to a sliding seat 33, and the sliding seats 33 are fixedly connected with a clamp 34.

[0074] In this embodiment, motor No. 1 31 is started, and motor No. 1 drives two threaded rods 32 to rotate. The two threaded rods 32 respectively drive two sliding seats 33 to move relative to each other through threaded transmission. The two sliding seats 33 drive two clamps 34 to clamp and fix the copper tube. When the vibration frequency of the copper tube is too high, increasing the clamping force of the two clamps 34 on the copper tube can reduce the vibration frequency of the copper tube.

[0075] The above embodiment of the present invention provides a copper tube cutting device for refrigeration and air conditioning processing, wherein the cutting precision control system includes:

[0076] The monitoring module includes a No. 1 vibration sensor, a No. 2 vibration sensor, and a temperature sensor. The No. 1 vibration sensor is connected to the cutting assembly 5, the No. 2 vibration sensor is arranged on the contact surface between the clamping mechanism 3 and the copper tube, and the temperature sensor is arranged on the cutting assembly 5;

[0077] A vibration evaluation module, which constructs a vibration evaluation model based on the vibration frequency information of the cutting component 5 and the vibration frequency information of the copper tube and outputs a vibration evaluation coefficient;

[0078] The control analysis module constructs a control analysis model based on the vibration evaluation coefficient and the temperature information of the temperature sensor, and outputs the control analysis coefficient. When the control analysis coefficient exceeds a threshold preset in the control analysis module, a judgment information is generated;

[0079] The control module regulates the clamping mechanism 3, the vibration reduction component 7, the flow control component 8 and the limit mechanism 9 according to the judgment information of the regulation and analysis module.

[0080] The vibration assessment model is:

[0081]

[0082] Where V is the vibration influence coefficient (dimensionless), which represents the comprehensive influence of vibration on cutting accuracy. t is the real-time vibration frequency of the cutting component 5, indicating the instantaneous vibration frequency of the tool during the cutting process; c is the real-time vibration frequency of the copper tube, indicating the instantaneous vibration frequency of the copper tube during the cutting process; k v It represents the vibration impact proportional factor (dimensionless), which indicates the overall sensitivity of frequency mismatch to vibration. This parameter is calibrated through experiments or production experience. v >0; η is the vibration influence index (dimensionless), which is used to adjust the nonlinear degree of the frequency difference. When η=1, the model is linear. When η>1, large frequency difference is emphasized. η≥1, the value of η is determined by production experience.

[0083] Formula Description: Term is the normalized frequency difference, which is used to eliminate the influence of the absolute frequency size and ensure that V is in the range of [0, 1); the denominator f t +f c It can ensure that the results are independent of the frequency magnitude and applicable to different speed scenarios. The vibration influence index η allows the model to capture the resonance effect (when f t ≈f c When the difference is greater, V is smaller; the greater the difference, the larger V is); parameter kv and η are system-specific constants. v Indicates that the system is sensitive to vibration (such as thin-walled copper tubes / high-rigidity tools), low k v Indicates strong system damping (e.g., vibration damping fixtures / flexible materials). Directly linking the vibration source (cutting component 5) and the receptor (copper tube) allows for earlier prediction of cutting instability than simply monitoring amplitude, enabling accurate resonance warning.

[0084] The regulation analysis model is:

[0085]

[0086] Wherein, C is the cutting accuracy judgment coefficient (dimensionless), which indicates the overall deviation degree of cutting accuracy. The larger the value, the worse the accuracy. T is the real-time temperature of the cutting component 5, which indicates the instantaneous temperature of the cutting component 5 during the cutting process. β is the vibration influence weight (dimensionless), which indicates the contribution weight of vibration to cutting accuracy. It satisfies β>0 and is determined through experiments or production experience. γ is the temperature influence coefficient, which indicates the sensitivity of temperature change to cutting accuracy. γ>0 (increased temperature reduces cutting accuracy). T ref is the reference temperature, which represents the temperature of the cutting component 5 under ideal cutting conditions, satisfying T ref ≥0, determined by actual production experience;

[0087] Formula Description: Used to capture temperature excursion effects, while This method is used to dimensionlessly process the real-time temperature values ​​of the cutting assembly 5, facilitating data fitting. The control and analysis model uses a linear summation approach to simplify calculations and facilitate parameter calibration. The effects of vibration and temperature are independent of each other, allowing for linear superposition. This allows for multi-physics coupling by simultaneously capturing the effects of mechanical vibration and thermal deformation.

[0088] The cutting accuracy judgment coefficient C is compared with the preset threshold C th For comparison, C th Indicates the maximum acceptable deviation of cutting accuracy, C th According to historical data or process requirements, when C>C th When the vibration frequency of the cutting component 5 and the copper tube is reduced and the surface temperature of the cutting component 5 is lowered, the cutting accuracy of the copper tube is improved.

[0089] In this embodiment, the control and analysis model integrates vibration science, thermodynamics and material processing principles, and realizes real-time quantitative prediction of the "cutting accuracy" that cannot be directly observed through measurable parameters, providing a theoretical core for intelligent manufacturing.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A copper tube cutting device for refrigeration and air conditioning processing, comprising a workbench (1), characterized in that: A limiting seat (2) is provided on the workbench (1), and clamping mechanisms (3) for fixing the copper tube are provided on both sides of the limiting seat (2). The workbench (1) is fixedly connected to a support frame (10), and the support frame (10) is fixedly connected to an electric telescopic rod (11). The telescopic end of the electric telescopic rod (11) is fixedly connected to a fixing frame (4), and the fixing frame (4) is connected to a limiting mechanism (9). The limiting mechanism (9) can limit the vertical position of the copper tube. Both ends of the electric telescopic rod (11) are fixedly connected to a buffer assembly (6), a cutting assembly (5) is horizontally limited between the two buffer assemblies (6), the two buffer assemblies (6) can elastically limit the cutting assembly (5), a flow control assembly (8) is provided between the two buffer assemblies (6) and can circulate the coolant in the two buffer assemblies (6), the two buffer assemblies (6) are commonly connected to a vibration reduction assembly (7), and the vibration reduction assembly (7) can spray and cool the cutting assembly (5); The cutting precision control system can control the clamping mechanism (3), the vibration reduction component (7), the flow control component (8) and the limit mechanism (9) according to the vibration information of the cutting component (5) and the copper tube during cutting and the temperature information of the cutting component (5), thereby improving the cutting precision of the copper tube.

2. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 1 is characterized in that: The buffer assembly (6) includes a fixed sleeve (61), a slide plate (62) and a spring (63); Both ends of the fixing frame (4) are fixedly connected to a fixing sleeve (61), and a slide plate (62) is slidably and sealingly connected to the fixing sleeve (61). The cavity between the slide plate (62) and the fixing sleeve (61) is filled with cooling liquid. A spring (63) is connected between the inner end surface of the slide plate (62) and the fixing sleeve (61), and both ends of the cutting assembly (5) are connected to the two slide plates (62).

3. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 1, characterized in that: The flow control assembly (8) includes a conduit (81), a No. 3 one-way valve (82), and a No. 4 one-way valve (83); Two conduits (81) are connected between the two fixed sleeves (61), and a No. 3 one-way valve (82) and a No. 4 one-way valve (83) with opposite conduction directions are respectively provided on the two conduits (81).

4. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 1, characterized in that: The vibration reduction assembly (7) includes a water pump (71), a No. 1 hose (72), a No. 2 hose (73), and a No. 1 one-way valve (74); The support frame (10) is fixedly connected to a water pump (71), and a No. 1 hose (72) is connected between the water pump (71) and the two fixed sleeves (61). A No. 1 one-way valve (74) is provided between the No. 1 hose (72) and the fixed sleeve (61) and is unidirectionally connected to the fixed sleeve (61). One end of the fixed sleeve (61) is fixedly connected to a connecting sleeve (75), and a No. 2 hose (73) is connected between the connecting sleeve (75) and the fixed sleeve (61). A No. 2 one-way valve (78) is provided on the No. 2 hose (73) and is unidirectionally connected to the connecting sleeve (75). The connecting sleeve (75) is rotatably connected to a rotating seat (76), and the rotating seat (76) is connected to an annular rubber bag (77). The annular rubber bag (77) is connected to the connecting sleeve (75) through the rotating seat (76), and a plurality of water spray holes are provided on the annular rubber bag (77).

5. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 1, characterized in that: The limiting mechanism (9) includes a connecting seat (91), a push rod (92), a sliding sleeve (93), a one-way air valve (94) and a pressure plate (95); The fixing frame (4) is fixedly connected to a connecting seat (91), the connecting seat (91) is fixedly connected to a push rod (92), the push rod (92) slides vertically and is sealedly connected to a sliding sleeve (93), a one-way air valve (94) for outward one-way conduction is provided near the bottom of the sliding sleeve (93), and a pressure plate (95) is fixedly connected to the bottom of the sliding sleeve (93).

6. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 1, characterized in that: The cutting precision control system includes: The monitoring module comprises a first vibration sensor, a second vibration sensor and a temperature sensor, wherein the first vibration sensor is connected to the cutting assembly (5), the second vibration sensor is arranged on the contact surface between the clamping mechanism (3) and the copper tube, and the temperature sensor is arranged on the cutting assembly (5); A vibration evaluation module, which constructs a vibration evaluation model based on the vibration frequency information of the cutting component (5) and the vibration frequency information of the copper tube and outputs a vibration evaluation coefficient; The control analysis module constructs a control analysis model based on the vibration evaluation coefficient and the temperature information of the temperature sensor, and outputs the control analysis coefficient. When the control analysis coefficient exceeds a threshold preset in the control analysis module, a judgment information is generated; The control module regulates the clamping mechanism (3), the vibration reduction component (7), the flow control component (8), and the limit mechanism (9) according to the judgment information of the regulation and analysis module.

7. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 6, characterized in that: The vibration assessment model is: ； in is the vibration influence coefficient; The real-time vibration frequency of the cutting component (5); The real-time vibration frequency of the copper tube; Indicates the vibration impact proportional factor, which is calibrated through experiments or production experience; ; is the vibration impact index, The value is determined through production experience.

8. The copper tube cutting equipment for refrigeration and air conditioning processing according to claim 7, characterized in that: The regulation analysis model is: ； in, is the cutting accuracy judgment coefficient; represents the instantaneous temperature of the cutting component (5) during the cutting process; is the vibration impact weight, satisfying , the specific value is determined through experiments or production experience; represents the temperature influence coefficient, ; is the reference temperature, which represents the temperature of the cutting component (5) under ideal cutting conditions, satisfying , the specific value is determined by actual production experience.

9. A method for cutting copper tubes for refrigeration and air conditioning processing, applied to the copper tube cutting equipment for refrigeration and air conditioning processing according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Place the copper tube on the limiting seat (2), start the clamping mechanism (3) to position the copper tube, and then the electric telescopic rod (11) drives the cutting assembly (5) and the limiting mechanism (9) to move downward, and the limiting mechanism (9) is in contact with the copper tube in advance, thereby further positioning the copper tube; S2: The cutting component (5) cuts the copper tube. According to the vibration information of the cutting component (5) and the copper tube during cutting and the temperature information of the cutting component (5), the cutting precision control system can control the clamping mechanism (3), the vibration reduction component (7), the flow control component (8) and the limiting mechanism (9).

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