A smart milling machine tool and method for spring machining

Abstract

This invention discloses an intelligent milling machine tool and method for spring processing, relating to the field of intelligent spring processing technology. It includes a milling power head and a worktable mounted on a frame, with the milling power head positioned above the worktable. A pulse chip removal mechanism is installed on the worktable, comprising a positioning sleeve, a directional nozzle assembly, a high-frequency pulse solenoid valve, and a cutting fluid pressure stabilization supply mechanism. This invention, by setting up a pulse chip removal mechanism and regulating the cutting fluid pressure through the cutting fluid pressure stabilization supply mechanism, achieves millisecond-level on / off switching of the cutting fluid via the high-frequency pulse solenoid valve. This causes the directional nozzle assembly to spray pulsed cutting fluid along the spring's spiral direction, forming a jet that penetrates the narrow spiral slit structure of the spring to remove chips. Combined with the outlet pipe at the bottom of the positioning sleeve, this achieves rapid discharge of chips and cutting fluid, thoroughly removing fine chips from the narrow spiral slit of the spring while avoiding the impact of the cutting fluid on low-rigidity springs, thus improving the accuracy and quality of spring end leveling processing.

Description

Technical Field

[0001] This invention relates to the field of intelligent spring processing technology, and in particular to an intelligent milling machine tool and method for spring processing. Background Technology

[0002] In spring machining, end leveling is one of the core finishing processes. To meet the assembly accuracy and fatigue performance requirements of springs, this process often employs a small-margin finishing method. With the increasing precision requirements of high-end equipment, the cleanliness requirements for spring machining also rise. Therefore, intelligent chip identification and efficient chip removal have become crucial factors affecting spring machining quality. However, existing intelligent milling machine tools for spring machining still have the following shortcomings during use: Because the pitch at the ends of some springs is small, forming a narrow slit structure, the fine chips generated during machining are easily stuck in it, posing a serious threat to machining quality. If the existing chip removal structure uses high-flow, high-pressure chip flushing, it will directly impact the low-rigidity spring workpiece, causing the workpiece to vibrate and shift or even shift its clamping position, affecting the milling process. If low-flow chip flushing is used, it cannot break through the narrow slit structure of the spring helix and cannot effectively flush out the fine chips stuck inside, thus causing the stuck chips to affect the milling process. Summary of the Invention

[0003] The purpose of this application is to provide an intelligent milling machine tool and method for spring processing, which can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: an intelligent milling machine tool for spring processing, comprising a milling power head and a worktable mounted on a frame, wherein the milling power head is positioned above the worktable, and a positioning mechanism is provided on the worktable for positioning the spring to be processed; a pulse chip removal mechanism is provided on the worktable, the pulse chip removal mechanism comprising: a positioning sleeve, a directional nozzle group, a high-frequency pulse solenoid valve, and a cutting fluid pressure stabilizing supply mechanism; wherein, the positioning sleeve is mounted on the worktable, and the spring is positioned within the positioning sleeve by the positioning mechanism, and an outlet pipe is provided at the bottom of the positioning sleeve; the directional nozzle group is positioned on one side of the top of the positioning sleeve, the directional nozzle group is aligned with the spiral slit position of the spring, and the spray direction of the directional nozzle group is aligned along the spiral direction of the spring; one end of the directional nozzle group is connected to the machine tool's circulating water tank through a fluid guide pipe; the high-frequency pulse solenoid valve is installed at the inlet end of the directional nozzle group; the cutting fluid pressure stabilizing supply mechanism is located on the fluid guide pipe and is used to control the delivery pressure of the cutting fluid.

[0005] Preferably, the cutting fluid pressure stabilizing supply mechanism includes a bladder accumulator and an overflow valve; the input end of the overflow valve is connected to the machine tool circulating water tank via a fluid guide pipe, and the output end of the overflow valve is connected to a high-frequency pulse solenoid valve via a fluid guide pipe; the bladder accumulator is installed on the worktable, and the fluid guide pipe between the bladder accumulator, the overflow valve, and the high-frequency pulse solenoid valve is connected; a high-pressure diaphragm pump is installed on one side of the machine tool circulating water tank, the input end of the high-pressure diaphragm pump is connected to the machine tool circulating water tank, and the output end of the high-pressure diaphragm pump is connected to the overflow valve via a fluid guide pipe.

[0006] Preferably, the positioning sleeve is provided with an auxiliary blowing mechanism, which is used to guide the cutting fluid and chips out.

[0007] Preferably, the auxiliary purging mechanism includes an annular conveying pipe and multiple nozzles; the annular conveying pipe is coaxially disposed on the positioning sleeve, the multiple nozzles are installed on the annular conveying pipe, and the input end of the annular conveying pipe is connected to an external air source; the multiple annular conveying pipes are configured in conjunction with a spring helix so that the airflow in the positioning sleeve moves along the spring helix.

[0008] Preferably, the positioning mechanism includes multiple threaded positioning rods, a sliding sleeve, a positioning block, a telescopic airbag, and a control mechanism; the multiple threaded positioning rods are disposed on the worktable and arranged circumferentially along the positioning sleeve; the sliding sleeve is fitted onto the threaded positioning rods; each threaded positioning rod is threaded with a pair of positioning nuts, and the sliding sleeve is disposed between the pair of positioning nuts; the positioning block is fixed to the sliding sleeve, and the positioning block is a U-shaped structure adapted to the spring; the telescopic airbag is disposed on the inner ring of the U-shaped structure and directly abuts against the spring; the control mechanism is disposed on the threaded positioning rods and is used to control the expansion state of the telescopic airbag.

[0009] Preferably, the control mechanism includes a cylinder, a piston, a screw, an internal threaded sleeve, and a handle; the cylinder is coaxially slidably connected to a threaded positioning rod, the threaded positioning rod has a sliding groove, the positioning block passes through the sliding groove and is connected to the cylinder, the positioning block is a hollow structure, and the interior of the cylinder is connected to the telescopic airbag through the positioning block; the piston is coaxially slidably connected to the cylinder; the screw is coaxially rotatably connected to the piston through a bearing around its axis; the internal threaded sleeve is coaxially fixed to the threaded positioning rod, and the internal threaded sleeve is threaded onto the screw; the handle is disposed on the screw.

[0010] Preferably, the frame is provided with a chip identification mechanism, which is used to identify the chip accumulation state.

[0011] Preferably, the chip identification mechanism includes a first mounting bracket, a high-frequency ultrasonic detector, a second mounting bracket, and a narrow-band laser diffuse reflection detector; the high-frequency ultrasonic detector is mounted on the positioning sleeve via the first mounting bracket, and the high-frequency ultrasonic detector is positioned directly opposite the spring helical narrow slit; the narrow-band laser diffuse reflection detector is mounted on the milling power head via the second mounting bracket, and the narrow-band laser diffuse reflection detector is positioned directly opposite the spring helical narrow slit.

[0012] Preferably, a controller is provided on the frame, and the high-frequency ultrasonic detector and the narrow-band laser diffuse reflection detector are both connected to the controller via signal control.

[0013] A smart milling method for spring machining, employing the aforementioned smart milling machine tool for spring machining; specifically including the following steps: Step 1, Pulse chip removal: The spring is coaxially positioned directly below the milling head by the positioning mechanism; during the process of machining the spring by the cutting tool on the milling head, the directional nozzle group sprays cutting fluid into the narrow slit of the spring helix, so that the cutting fluid flows along the spring helix. Step 2, Pressure Stabilization Control: During the operation of the directional nozzle group, the low-pressure cutting fluid in the machine tool circulating water tank is pressurized to the set stable pressure, and the pressure fluctuation is eliminated by the cutting fluid pressure stabilization supply mechanism, so as to provide a stable high-pressure coolant source for the high-frequency pulse solenoid valve group.

[0014] In summary, the technical effects and advantages of this invention are as follows: 1. This invention, by setting up a pulse chip removal mechanism and regulating the cutting fluid pressure through a cutting fluid pressure stabilizing supply mechanism, achieves millisecond-level on / off switching of the cutting fluid via a high-frequency pulse solenoid valve. This causes the directional nozzle group to spray pulsed cutting fluid along the spring helical direction, forming a jet that adheres to the wall and penetrates the narrow slit structure of the spring helical structure to remove chips. Combined with the bottom outlet pipe of the positioning sleeve, this achieves rapid discharge of chips and cutting fluid. This not only thoroughly removes the fine chips in the narrow slit of the spring helical structure, eliminating the adverse effects of secondary chip cutting on the milling process, but also avoids the impact of the cutting fluid on the low-rigidity spring, ensuring the positional stability of the spring during milling and improving the accuracy and quality of the spring end leveling process.

[0015] 2. This invention sets up a chip recognition mechanism, which uses a high-frequency ultrasonic detector to perform ultrasonic scanning on the blind area of ​​the spring spiral narrow slit, and combines this with a narrow-band laser diffuse reflection detector to perform laser detection on the opening area. The multi-source detection data complement each other to achieve real-time identification of the chip accumulation state in the entire spiral narrow slit area without blind spots. Then, the controller fuses and analyzes the detection data and sends control signals to the pulse chip removal mechanism to achieve intelligent linkage between chip recognition and chip removal action. This allows the chip removal strategy to be adaptively adjusted according to the chip accumulation state, greatly improving the accuracy and efficiency of chip removal.

[0016] 3. This invention, by setting up a positioning mechanism, moves the sliding sleeve and positioning block to a suitable height by adjusting the positioning nut on the threaded positioning rod, thus achieving initial circumferential limiting of springs of different specifications. Then, by controlling the piston to slide in the cylinder, the volume of the cavity is changed to inflate or deflate the telescopic airbag, so that the telescopic airbag clamps and fixes the spring in a flexible contact manner. This not only allows for precise adjustment of the clamping force according to the specifications and rigidity of the spring, ensuring that the spring does not shift position during milling and chip removal, but also avoids the squeezing deformation caused by rigid clamping to low-rigidity springs. At the same time, it is suitable for the processing needs of springs of multiple specifications and small batches, improving the versatility of the equipment, reducing the positioning and debugging time when changing products, and improving the uptime of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a three-dimensional enlarged structural diagram of the positioning mechanism and the pulse chip removal mechanism of the present invention; Figure 5 This is a three-dimensional enlarged structural schematic diagram of the positioning mechanism of the present invention; Figure 6 This is a three-dimensional enlarged structural schematic diagram of the control mechanism of the present invention; Figure 7 This is a partially cross-sectional, enlarged three-dimensional structural diagram of the positioning mechanism of the present invention; Figure 8 This is a three-dimensional enlarged structural schematic diagram of the telescopic airbag of the present invention; Figure 9 This is a first-view magnified three-dimensional structural diagram of the pulse chip removal mechanism of the present invention; Figure 10 This is a three-dimensional magnified structural diagram of the pulse chip removal mechanism of the present invention from a second perspective; Figure 11 This is a flowchart of the method of the present invention.

[0019] In the diagram: 1. Frame; 2. Milling power head; 3. Worktable; 4. Positioning mechanism; 41. Threaded positioning rod; 42. Sliding sleeve; 43. Positioning nut; 44. Positioning block; 45. Telescopic airbag; 46. Control mechanism; 461. Cylinder; 462. Slide groove; 463. Piston; 464. Screw; 465. Internal threaded sleeve; 466. Handle; 5. Chip recognition mechanism; 51. First mounting bracket; 52. High-frequency ultrasonic detector; 53. Second mounting bracket; 54. Narrow-band laser diffuse reflection detector; 6. Pulse chip removal mechanism; 61. Positioning sleeve; 62. Outlet pipe; 63. Directional nozzle assembly; 64. Liquid guide pipe; 65. High-frequency pulse solenoid valve; 66. Cutting fluid pressure stabilizing supply mechanism; 661. Bladder accumulator; 662. Overflow valve; 67. Auxiliary purging mechanism; 671. Annular delivery pipe; 672. Nozzle. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-4 and Figures 9-10 The diagram illustrates an intelligent milling machine tool for spring machining, comprising a milling power head 2 and a worktable 3 mounted on a frame 1. The milling power head 2 is positioned above the worktable 3. A positioning mechanism 4 is mounted on the worktable 3 for positioning the spring to be machined. A pulse chip removal mechanism 6 is mounted on the worktable 3, comprising a positioning sleeve 61, a directional nozzle assembly 63, a high-frequency pulse solenoid valve 65, and a cutting fluid pressure regulating supply mechanism 66. The positioning sleeve 61 is mounted on the worktable 3, and the spring is positioned by the positioning mechanism 4. Inside the positioning sleeve 61, a discharge pipe 62 is provided at the bottom of the positioning sleeve 61; a directional nozzle assembly 63 is provided on the top side of the positioning sleeve 61, the directional nozzle assembly 63 is aligned with the spiral slit of the spring, and the spray direction of the directional nozzle assembly 63 is aligned with the spiral direction of the spring; one end of the directional nozzle assembly 63 is connected to the machine tool circulating water tank through a liquid guide pipe 64; a high-frequency pulse solenoid valve 65 is installed at the inlet end of the directional nozzle assembly 63; a cutting fluid pressure stabilizing supply mechanism 66 is provided in the liquid guide pipe 64 and is used to control the delivery pressure of the cutting fluid.

[0022] It should be noted that before performing end milling on the spring, the spring to be processed is first placed in the positioning sleeve 61 on the worktable 3. The positioning sleeve 61 is an inverted conical hollow structure. The bottom of the positioning sleeve 61 is adapted to the spring, and the positioning sleeve 61 constrains the spring to a preliminary vertical position. Then, the positioning mechanism 4 on the worktable 3 precisely positions and fixes the spring to be processed, ensuring that the spring will not shift its position during processing. After the spring is positioned, the milling power head 2 is started and performs small-mass fine milling on the end of the spring. The micron-sized micro chips generated during the processing will be stuck in the spiral narrow slot of the spring. At this time, the pulse chip removal mechanism 6 starts working. The cutting fluid in the machine tool's circulating water tank is transported through the guide pipe 64. The cutting fluid pressure stabilizing supply mechanism 66 controls the pressure of the cutting fluid in the guide pipe 64, stabilizing the cutting fluid at a pressure value suitable for spring machining. The pressure-regulated cutting fluid is then transported to the high-frequency pulse solenoid valve 65. The high-frequency pulse solenoid valve 65 controls the flow of the cutting fluid according to the chip accumulation, causing the cutting fluid to enter the directional nozzle group 63 in a pulsed form. After the pulsed cutting fluid is ejected from the directional nozzle group 63, it flows along the extension direction of the spring's spiral slit, forming a wall-attached jet. This jet can penetrate the spiral slit structure of the spring, gradually flushing out the internally stuck micro-chips. The flushed-out chips and cutting fluid are discharged together through the outlet pipe 62 at the bottom of the positioning sleeve 61, completing the chip removal operation. Throughout the chip removal process, the pressure and spray pattern of the cutting fluid are adapted to the machining requirements of the low-rigidity spring, avoiding impact on the spring.

[0023] By setting a positioning mechanism 4 and a pulse chip removal mechanism 6 on the worktable 3, the positioning mechanism 4 can accurately position the spring to be processed, ensuring the positional accuracy of the milling process and avoiding deviation during spring processing that would affect the processing quality. The pulse chip removal mechanism 6, through the coordinated operation of the cutting fluid pressure stabilizing supply mechanism 66, the high-frequency pulse solenoid valve 65, and the directional nozzle group 63, replaces the traditional constant pressure chip removal scheme, realizing pulsed directional spraying of cutting fluid. This ensures that the cutting fluid penetrates the spiral narrow slit structure of the spring, effectively removing the internally stuck micro-chips, preventing tool breakage and workpiece surface scratches caused by secondary chip cutting, and avoiding the impact of high-flow, high-pressure chip removal on the low-rigidity spring, preventing spring vibration deformation or clamping deviation, and ensuring the stability of spring milling. At the same time, the alignment of the directional nozzle group 63 with the spiral narrow slit of the spring ensures that the spray path of the cutting fluid fits the spiral narrow slit, improving chip removal efficiency. The outlet pipe 62 at the bottom of the positioning sleeve 61 enables the rapid discharge of chips and cutting fluid, keeping the processing area clean, reducing downtime for cleaning, and improving the processing efficiency of the equipment.

[0024] See Figures 9-10The cutting fluid pressure stabilizing supply mechanism 66 includes a bladder accumulator 661 and an overflow valve 662; the input end of the overflow valve 662 is connected to the machine tool circulating water tank through a fluid guide pipe 64, and the output end of the overflow valve 662 is connected to a high-frequency pulse solenoid valve 65 through a fluid guide pipe 64; the bladder accumulator 661 is installed on the worktable 3 (e.g., Figure 4 As shown in the figure, the bladder-type accumulator 661 is connected to the overflow valve 662 and the high-frequency pulse solenoid valve 65 via a liquid guide pipe 64; a high-pressure diaphragm pump is installed on one side of the machine tool circulating water tank, the input end of the high-pressure diaphragm pump is connected to the machine tool circulating water tank, and the output end of the high-pressure diaphragm pump is connected to the overflow valve 662 via the liquid guide pipe 64; it is understood that the machine tool circulating water tank and the high-pressure diaphragm pump are existing technologies, not shown in the figure, and will not be described in detail.

[0025] It should be noted that the high-pressure diaphragm pump of the cutting fluid pressure stabilizing and supply mechanism 66 starts first, drawing and pressurizing the cutting fluid from the machine tool's circulating water tank. The pressurized cutting fluid is then transported to the overflow valve 662 via the guide pipe 64. The overflow valve 662 performs primary pressure stabilization on the cutting fluid, limiting its pressure within a preset safe range to prevent overpressure damage to the downstream high-frequency pulse solenoid valve 65 and the directional nozzle assembly 63. After being pressure stabilized by the overflow valve 662, part of the cutting fluid is transported to the high-frequency pulse solenoid valve 65, and the other part enters the bladder accumulator 661. The bladder accumulator 661 stores excess high-pressure cutting fluid, thus achieving hydraulic energy storage. When the high-frequency pulse solenoid valve 65 opens in milliseconds, the instantaneous flow rate in the fluid guide tube 64 increases sharply. The high-pressure cutting fluid stored in the bladder accumulator 661 is released instantly to replenish the flow gap and prevent a sudden drop in pressure in the pipeline. When the high-frequency pulse solenoid valve 65 closes and the instantaneous flow rate drops sharply, the excess cutting fluid re-enters the bladder accumulator 661 for storage, offsetting the pressure peak in the pipeline and achieving dynamic pressure stabilization of the cutting fluid pressure. This ensures that the cutting fluid pressure delivered to the directional nozzle assembly 63 remains stable within the set range, and works in conjunction with the high-frequency pulse solenoid valve 65 to achieve stable pulse injection of the cutting fluid.

[0026] By using the bladder accumulator 661, overflow valve 662, and high-pressure diaphragm pump in conjunction, the high-pressure diaphragm pump can achieve stable pressurization of the cutting fluid, providing sufficient power support for chip removal operations. The overflow valve 662 can effectively limit the maximum pressure of the cutting fluid, protecting the downstream components of the pulse chip removal mechanism 6 and preventing damage to components caused by overpressure. The bladder accumulator 661 enables dynamic pressure stabilization of the cutting fluid, accurately compensating for flow and pressure fluctuations generated during the on / off process of the high-frequency pulse solenoid valve 65, ensuring that the cutting fluid pressure remains stable within the set range. This guarantees that the pulse cutting fluid pressure ejected by the directional nozzle assembly 63 does not fluctuate significantly, ensuring the cutting fluid's effective removal of fine chips within the spring spiral slit while avoiding the problem of fluctuating cutting fluid impact force due to pressure fluctuations. This minimizes the impact of the cutting fluid on the low-rigidity spring, and the stable pressure supply also extends the service life of the high-frequency pulse solenoid valve 65 and the directional nozzle assembly 63, reducing the equipment failure rate.

[0027] See Figures 9-10 An auxiliary blowing mechanism 67 is provided inside the positioning sleeve 61 to guide the cutting fluid and chips out. The auxiliary blowing mechanism 67 includes an annular delivery pipe 671 and multiple nozzles 672. The annular delivery pipe 671 is coaxially arranged in the positioning sleeve 61, and the multiple nozzles 672 are installed in the annular delivery pipe 671. The input end of the annular delivery pipe 671 is connected to an external air source. The multiple annular delivery pipes 671 are arranged in conjunction with a spring helix so that the airflow in the positioning sleeve 61 moves along the spring helix.

[0028] It should be noted that after the directional nozzle group 63 of the pulse chip removal mechanism 6 sprays pulsed cutting fluid to flush the chips in the narrow slot of the spring spiral, the auxiliary blowing mechanism 67 is started simultaneously. An external air source delivers compressed air to the annular conveying pipe 671 inside the positioning sleeve 61. The annular conveying pipe 671 is configured to cooperate with the spring spiral. The compressed air is sprayed out through multiple nozzles 672 on the annular conveying pipe 671. The sprayed airflow moves along the spring spiral, forming an airflow path adapted to the spring spiral, which blows the spring, reduces the adhesion of cutting fluid and fine chips, and drives the blown-off chips and residual cutting fluid to be quickly discharged through the outlet pipe 62 at the bottom of the positioning sleeve 61 under the push of the airflow. In addition, the airflow moves along the spring spiral during the entire blowing process and will not cause direct impact on the low-rigidity spring.

[0029] See Figures 4-6The positioning mechanism 4 includes multiple threaded positioning rods 41, a sliding sleeve 42, a positioning block 44, a telescopic airbag 45, and a control mechanism 46. The multiple threaded positioning rods 41 are arranged on the worktable 3 and are circumferentially arranged along the positioning sleeve 61. The sliding sleeve 42 is sleeved on the threaded positioning rods 41. Each threaded positioning rod 41 is threaded with a pair of positioning nuts 43, and the sliding sleeve 42 is located between the pair of positioning nuts 43. The positioning block 44 is fixed to the sliding sleeve 42 and is a U-shaped structure adapted to the spring. The telescopic airbag 45 is located in the inner ring of the U-shaped structure and directly abuts against the spring. The control mechanism 46 is located on the threaded positioning rods 41 and is used to control the expansion state of the telescopic airbag 45.

[0030] It should be noted that when positioning the spring to be machined, first, according to the specifications and dimensions of the spring, adjust the positioning nut 43 on the threaded positioning rod 41. The positioning nut 43 drives the sliding sleeve 42 to move up and down along the threaded positioning rod 41. The sliding sleeve 42 drives the positioning block 44 to move to a height that matches the spring, so that the spring is stuck in the U-shaped structure of the positioning block 44. Thus, the spring is initially limited from the circumference by multiple positioning blocks 44 arranged around the positioning sleeve 61. Subsequently, the control mechanism 46 controls the expansion of the telescopic air bladder 45 inside the positioning block 44. The expanded telescopic air bladder 45 directly abuts against the outer wall of the spring. Using the elastic abutment force of the telescopic air bladder 45, the spring is flexibly clamped and fixed from the circumference. This ensures that the spring will not shift its position during milling and chip removal, and avoids the squeezing deformation caused by rigid clamping of low-rigidity springs through flexible clamping, thus achieving accurate and stable positioning of the spring.

[0031] By incorporating the positioning mechanism 4, the height of the positioning block 44 can be flexibly adjusted according to springs of different specifications and sizes, enabling the positioning of springs of various specifications. This improves the equipment's versatility and adapts to the characteristics of multi-specification, small-batch spring processing. The flexible clamping method of the telescopic airbag 45 replaces the traditional rigid clamping structure. It provides sufficient clamping force to the spring, ensuring no positional shift during milling and chip removal, while avoiding the extrusion deformation caused by rigid clamping on low-rigidity springs. This effectively guarantees the processing accuracy and dimensional consistency of the springs.

[0032] See Figures 5-8The control mechanism 46 includes a cylinder 461, a piston 463, a screw 464, an internal threaded sleeve 465, and a handle 466. The cylinder 461 is coaxially slidably connected to the threaded positioning rod 41. The threaded positioning rod 41 has a sliding groove 462. The positioning block 44 passes through the sliding groove 462 and is connected to the cylinder 461. The positioning block 44 has a hollow structure, and the interior of the cylinder 461 is connected to the telescopic airbag 45 through the positioning block 44. The piston 463 is coaxially slidably connected to the cylinder 461. The screw 464 is coaxially rotatably connected to the piston 463 through a bearing around its axis. The internal threaded sleeve 465 is coaxially fixed to the threaded positioning rod 41, and the internal threaded sleeve 465 is threadedly sleeved on the screw 464. The handle 466 is provided on the screw 464.

[0033] It should be noted that when adjusting the expansion state of the telescopic airbag 45 through the control mechanism 46, rotating the handle 466 causes the screw 464 to rotate around its axis. The screw 464 engages with the internal threaded sleeve 465 coaxially fixed to the threaded positioning rod 41, thereby converting the rotation of the screw 464 into linear movement along the axis of the threaded positioning rod 41. The screw 464 drives the piston 463, which is connected to it through a bearing, to slide along the axis of the cylinder 461. When the piston 463 slides inside the cylinder 461, it changes the volume of the cavity inside the cylinder 461. The gas inside the cylinder 461 is either forced into the telescopic airbag 45 or drawn back from the telescopic airbag 45 as the piston 463 slides. When the gas is forced into the telescopic airbag 45, the telescopic airbag 45 expands and contacts the spring to clamp; when the gas is drawn back from the telescopic airbag 45, the telescopic airbag 45 contracts and separates from the spring to release the clamp.

[0034] By utilizing the threaded engagement of handle 466, screw 464, and internal threaded sleeve 465, precise linear movement of piston 463 can be achieved, thereby enabling precise control of the expansion degree of telescopic airbag 45. This allows the telescopic airbag 45 to provide an appropriate clamping force based on the rigidity and specifications of the spring, ensuring clamping stability while minimizing the impact of compression on the spring, thus improving positioning accuracy and flexibility. The bearing connection between screw 464 and piston 463 prevents the rotation of screw 464 from driving the rotation of piston 463, ensuring smooth sliding of piston 463 within cylinder 461, improving the stability of gas delivery, and consequently ensuring the stability of the expansion state of telescopic airbag 45.

[0035] Example 2: The technical solution of this example differs from that of Example 1 in that: (See below) Figures 1-3 and Figures 4-5The frame 1 is equipped with a chip identification mechanism 5, which is used to identify the chip accumulation state. The chip identification mechanism 5 includes a first mounting bracket 51, a high-frequency ultrasonic detector 52, a second mounting bracket 53, and a narrow-band laser diffuse reflection detector 54. The high-frequency ultrasonic detector 52 is mounted on the positioning sleeve 61 through the first mounting bracket 51, and the high-frequency ultrasonic detector 52 is directly opposite the spring spiral narrow slit position. The narrow-band laser diffuse reflection detector 54 is mounted on the milling power head 2 through the second mounting bracket 53, and the narrow-band laser diffuse reflection detector 54 is directly opposite the spring spiral narrow slit position.

[0036] It should be noted that during the milling process of the spring by the milling power head 2, the chip identification mechanism 5 continuously identifies the chip accumulation state within the spring's spiral slit in real time. The first mounting bracket 51 fixes the high-frequency ultrasonic detector 52 to the positioning sleeve 61, with the high-frequency ultrasonic detector 52 facing the spring's spiral slit. The high-frequency ultrasonic detector 52 emits a high-frequency ultrasonic beam, which scans along the extension direction of the spring's spiral slit. Utilizing the acoustic impedance difference between the fine chips and the spring's metal matrix and air, echo signals are collected to identify the chip accumulation location and amount within the blind zone of the spiral slit. The second mounting bracket 53 fixes the narrow-band laser diffuse reflection detector 54 to the milling power head 2. The narrow-band laser diffuse reflection detector 54 is directly facing the spring spiral narrow slot. The detection position is adjusted synchronously with the movement of the milling power head 2. The narrow-band laser diffuse reflection detector 54 emits a narrow-band line laser. By collecting the laser diffuse reflection echo signal of the inner wall of the spring spiral narrow slot, the chip adhesion state of the spiral narrow slot opening area is identified. The detection data of the high-frequency ultrasonic detector 52 and the narrow-band laser diffuse reflection detector 54 complement each other, realizing blind-zone-free identification of the chip accumulation state of the entire area of ​​the spring spiral narrow slot.

[0037] By setting up a chip identification mechanism 5 and utilizing a multi-source detection method combining a high-frequency ultrasonic detector 52 and a narrow-band laser diffuse reflection detector 54, real-time, blind-zone-free identification of the chip accumulation state across the entire area of ​​the spring spiral slit is achieved. The high-frequency ultrasonic detector 52 can effectively penetrate the closed area of ​​the spiral slit and identify the chip accumulation in the blind zone, while the narrow-band laser diffuse reflection detector 54 can accurately identify the chip adhesion state in the open area. The detection data from both complement each other, significantly improving the accuracy of chip identification. It can accurately obtain the chip accumulation position and amount within the spiral slit, providing precise data support for the chip removal action of the pulse chip removal mechanism 6. Furthermore, the narrow-band laser diffuse reflection detector 54 is installed on the milling power head 2 and can synchronously adjust the detection area according to the milling position, realizing dynamic tracking and identification of the chip accumulation state during the machining process.

[0038] See Figures 3-5 Rack 1 (e.g.) Figure 1The device is equipped with a controller, and the high-frequency ultrasonic detector 52 and the narrow-band laser diffuse reflection detector 54 are all connected to the controller via signal control. It is understood that the controller, the high-frequency ultrasonic detector 52 and the narrow-band laser diffuse reflection detector 54 are all existing technologies. The controller is not shown in the figure and will not be described in detail.

[0039] It should be noted that the high-frequency ultrasonic detector 52 and narrow-band laser diffuse reflection detector 54 of the chip recognition mechanism 5 transmit the collected chip accumulation status detection data to the controller in real time via signal transmission. The controller performs fusion processing and analysis on the received multi-source detection data to accurately determine the chip accumulation level and jamming risk within the spring spiral narrow slot. When the controller determines that the chip accumulation amount has reached the preset value, it immediately sends control signals to the high-frequency pulse solenoid valve 65 and the cutting fluid pressure stabilizing supply mechanism 66 of the pulse chip removal mechanism 6, controlling the on / off frequency and duty cycle of the high-frequency pulse solenoid valve 65 and the cutting fluid output pressure of the cutting fluid pressure stabilizing supply mechanism 66 to achieve adaptive adjustment of the chip removal strategy. When the controller determines that the chips have been completely removed, it sends a control signal to stop the operation of the pulse chip removal mechanism 6, realizing intelligent linkage control of chip recognition and chip removal actions.

[0040] By setting up a controller and establishing signal control connections with the high-frequency ultrasonic detector 52 and the narrow-band laser diffuse reflection detector 54, a fully closed-loop intelligent linkage between chip identification and chip removal is achieved. The controller can perform real-time analysis and processing of multi-source detection data, accurately determine the chip accumulation state, and adaptively adjust the chip removal strategy according to the accumulation state, replacing the traditional fixed-cycle chip flushing mode. This makes the chip removal action more precise and efficient, ensuring thorough chip removal while avoiding unnecessary chip removal actions, reducing cutting fluid consumption, and improving cutting fluid utilization. Simultaneously, the controller's linkage control enables coordinated operation between milling and chip removal. When the risk of chip accumulation is high, milling parameters can be adjusted synchronously to reduce chip generation and jamming at the source, further improving the synergy between machining and chip removal, ensuring the machining quality of springs and the operational stability of the equipment, and achieving intelligent control of spring machining.

[0041] A smart milling method for spring machining, see [reference] Figures 1-11 The above-mentioned intelligent milling machine tool for spring processing is used; specifically, the following steps are included: Step 1, Pulse chip removal: The spring is coaxially positioned directly below the milling head 2 by the positioning mechanism 4; during the process of machining the spring by the tool on the milling head 2, the directional nozzle group 63 sprays cutting fluid into the narrow slit of the spring helix, so that the cutting fluid flows along the spring helix. Step 2, Pressure Stabilization Control: During the operation of the directional nozzle group 63, the low-pressure cutting fluid in the machine tool circulating water tank is pressurized to the set stable pressure, and the pressure fluctuation is eliminated by the cutting fluid pressure stabilization supply mechanism 66, so as to provide a stable high-pressure coolant source for the high-frequency pulse solenoid valve group 65.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent milling machine for spring machining, comprising a milling power head (2) and a worktable (3) arranged on a frame (1), the milling power head (2) being arranged above the worktable (3), characterized in that: The worktable (3) is provided with a positioning mechanism (4) for positioning the spring to be processed; the worktable (3) is provided with a pulse chip removal mechanism (6), the pulse chip removal mechanism (6) includes: Positioning sleeve (61), the positioning sleeve (61) is set on the worktable (3), the spring is positioned in the positioning sleeve (61) by the positioning mechanism (4), and the bottom of the positioning sleeve (61) is provided with an outlet tube (62). A directional nozzle assembly (63) is disposed on the top side of the positioning sleeve (61). The directional nozzle assembly (63) is aligned with the spiral slit of the spring, and the spraying direction of the directional nozzle assembly (63) is aligned with the spiral direction of the spring. One end of the directional nozzle assembly (63) is connected to the machine tool circulating water tank through a liquid guide pipe (64). A high-frequency pulse solenoid valve (65) is installed at the inlet end of the directional nozzle assembly (63). And a cutting fluid pressure stabilizing supply mechanism (66), which is disposed on the fluid guide pipe (64) and is used to control the delivery pressure of the cutting fluid.

2. The intelligent milling machine tool for spring processing according to claim 1, characterized in that: The cutting fluid pressure stabilizing supply mechanism (66) includes a bladder accumulator (661) and an overflow valve (662); the input end of the overflow valve (662) is connected to the machine tool circulating water tank through a liquid guide pipe (64), and the output end of the overflow valve (662) is connected to a high-frequency pulse solenoid valve (65) through a liquid guide pipe (64); the bladder accumulator (661) is installed on the worktable (3), and the liquid guide pipe (64) between the bladder accumulator (661) and the overflow valve (662) and the high-frequency pulse solenoid valve (65) is connected; a high-pressure diaphragm pump is installed on one side of the machine tool circulating water tank, the input end of the high-pressure diaphragm pump is connected to the machine tool circulating water tank, and the output end of the high-pressure diaphragm pump is connected to the overflow valve (662) through a liquid guide pipe (64).

3. The intelligent milling machine tool for spring processing according to claim 1, characterized in that: The positioning sleeve (61) is provided with an auxiliary purging mechanism (67) for guiding the cutting fluid and chips out.

4. The intelligent milling machine tool for spring processing according to claim 3, characterized in that: The auxiliary purging mechanism (67) includes an annular conveying pipe (671) and multiple nozzles (672); the annular conveying pipe (671) is coaxially disposed on the positioning sleeve (61), and the multiple nozzles (672) are installed on the annular conveying pipe (671). The input end of the annular conveying pipe (671) is connected to an external air source; the multiple annular conveying pipes (671) are configured in conjunction with a spring helix so that the airflow in the positioning sleeve (61) moves along the spring helix.

5. The intelligent milling machine tool for spring processing according to claim 1, characterized in that: The positioning mechanism (4) includes multiple threaded positioning rods (41), a sliding sleeve (42), a positioning block (44), a telescopic airbag (45), and a control mechanism (46). The multiple threaded positioning rods (41) are arranged on the worktable (3) and are arranged circumferentially along the positioning sleeve (61). The sliding sleeve (42) is sleeved on the threaded positioning rods (41). Each threaded positioning rod (41) is threaded with a pair of positioning nuts (43), and the sliding sleeve (42) is located between the pair of positioning nuts (43). The positioning block (44) is fixed on the sliding sleeve (42) and is a U-shaped structure adapted to the spring. The telescopic airbag (45) is located in the inner ring of the U-shaped structure and directly contacts the spring. The control mechanism (46) is located on the threaded positioning rods (41) and is used to control the expansion state of the telescopic airbag (45).

6. The intelligent milling machine tool for spring processing according to claim 5, characterized in that: The control mechanism (46) includes a cylinder (461), a piston (463), a screw (464), an internal threaded sleeve (465), and a handle (466); the cylinder (461) is coaxially slidably connected to a threaded positioning rod (41), the threaded positioning rod (41) has a groove (462), the positioning block (44) passes through the groove (462) and is connected to the cylinder (461), the positioning block (44) is a hollow structure, and the cylinder (461) The interior of cylinder (461) is connected to telescopic airbag (45) via positioning block (44); piston (463) is coaxially slidably connected to cylinder (461); screw (464) is coaxially rotatably connected to piston (463) via bearing around its axis; internal thread sleeve (465) is coaxially fixed to threaded positioning rod (41), and internal thread sleeve (465) is threadedly sleeved on screw (464); handle (466) is provided on screw (464).

7. The intelligent milling machine tool for spring processing according to claim 1, characterized in that: The frame (1) is provided with a chip identification mechanism (5), which is used to identify the chip accumulation state.

8. The intelligent milling machine tool for spring processing according to claim 7, characterized in that: The chip identification mechanism (5) includes a first mounting bracket (51), a high-frequency ultrasonic detector (52), a second mounting bracket (53), and a narrow-band laser diffuse reflection detector (54); the high-frequency ultrasonic detector (52) is mounted on the positioning sleeve (61) through the first mounting bracket (51), and the high-frequency ultrasonic detector (52) is directly opposite the spring spiral narrow slit position; the narrow-band laser diffuse reflection detector (54) is mounted on the milling power head (2) through the second mounting bracket (53), and the narrow-band laser diffuse reflection detector (54) is directly opposite the spring spiral narrow slit position.

9. A smart milling machine tool for spring processing according to claim 8, characterized in that: A controller is provided on the frame (1), and the high-frequency ultrasonic detector (52) and the narrow-band laser diffuse reflection detector (54) are connected to the controller via signal control.

10. A smart milling method for spring machining, characterized in that: The intelligent milling machine tool for spring machining as described in any one of claims 1-9 specifically includes the following steps: Step 1, Pulse chip removal: The spring is coaxially positioned directly below the milling power head (2) by the positioning mechanism (4); during the process of machining the spring by the tool on the milling power head (2), the directional nozzle group (63) sprays the cutting fluid into the narrow slit of the spring spiral, so that the cutting fluid flows along the spring spiral line; Step 2, pressure stabilization control: During the operation of the directional nozzle group (63), the low-pressure cutting fluid in the machine tool circulating water tank is pressurized to the set stable pressure, and the pressure fluctuation is eliminated by the cutting fluid pressure stabilization supply mechanism (66), providing a stable high-pressure coolant source for the high-frequency pulse solenoid valve (65) group.

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