Screw milling device and using method thereof
By using a box-type packaging structure and limiting device, the problems of chip splashing and axial runout in screw milling are solved, achieving efficient and precise screw machining and ensuring product quality.
Patent Information
- Application Number
- CN202511937536.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-03-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During screw milling, flying debris makes cleaning difficult, and long screws are prone to axial runout during machining, affecting accuracy and product quality.
The screw milling device adopts a box-type enclosed structure, uses a three-jaw chuck and ejector pin for limiting, and combines a collection and positioning box and an intermediate positioning plate to prevent debris from splashing and stabilize the screw. The axial runout problem is solved by cooling with coolant and dressing with grinding wheel.
Effectively collects debris, avoids splashing, improves the efficiency of cleaning the processing environment, ensures the accuracy and quality of screw milling, prevents axial runout, and improves product consistency.
Smart Images
Figure CN121589336A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of metal cutting equipment, and in particular to a screw milling device and its method of use. Background Technology
[0002] A screw milling machine is a specialized machine tool used for machining screw-type parts. It uses CNC programming to control the movement of the milling cutter along a helical trajectory, while the workpiece rotates between centers, achieving efficient and high-precision thread milling. Its advantages include the ability to machine large-diameter, long-stroke screws, making it suitable for mass production of complex threads in petroleum machinery, marine propellers, injection molding machine screws, etc., offering advantages such as high machining efficiency, good surface quality, and strong adaptability.
[0003] Currently, when milling screws, the chips generated during high-speed cutting are uncontrollably scattered in all directions. After machining, the machine tool is covered with these splattered chips, making subsequent cleaning extremely difficult. Furthermore, when machining long-shaft screws, the cutting force applied by the milling cutter is approximately perpendicular to the screw's fixing direction. This results in significant lateral forces on the screw's center, especially during machining. Due to the long length of the screw, the pressure distribution at its clamping ends is uneven, easily leading to insufficient clamping force. Insufficient clamping force can cause the screw to shift under the cutting force, resulting in axial runout. This axial runout severely affects the milling accuracy of the screw, causing it to fail to meet design requirements, leading to decreased product quality and wasted resources. Summary of the Invention
[0004] This invention proposes a screw milling device and its usage method, which has the advantages of box-type packaging and three-point limiting, in order to solve the problems mentioned in the background art, such as the scattering of waste chips and the axial runout of the screw caused by the cutting tool during milling of long screws.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a screw milling device, comprising: a machine tool, which uses a three-jaw chuck and a center to limit and fasten both ends of a screw; a control unit installed on the side of the machine tool to regulate the rotation of the screw by the three-jaw chuck; a collection and positioning box, which is movably mounted on the machine tool using a transverse component, and has a vertical component on its inner side; the vertical component uses a rotation and drive component to drive a milling cutter to mill the screw; the outer part of the screw is located inside the collection and positioning box, so that the milling debris is concentrated inside the collection and positioning box; and an intermediate positioning plate, which is fixed to the side of the collection and positioning box and is sleeved with the outer part of the screw; the intermediate positioning plate moves with the collection and positioning box and changes the limiting position on the middle part of the screw to prevent axial runout during the milling of a long screw.
[0006] Furthermore, a coolant pipe is fixedly installed at the end of the rotation and drive assembly, which is arranged in the direction of the milling cutter.
[0007] Furthermore, the three-jaw chuck, ejector pin, and collection and positioning box for clamping the screw are all arranged at an angle, so that the coolant flows along the screw and the coolant can wrap around the screw to cool it down; a filter plate is movably installed on the outside of the collection and positioning box, and a gap is left between the inner side of the filter plate and the screw for filtering the coolant.
[0008] Furthermore, a support frame is movably installed on the inner side wall of the collection and positioning box, and a grinding wheel located above the screw is movably installed in the middle of the support frame. A drive unit is fixedly installed at one end of the support frame, and an electromagnetic clutch assembly is fixedly installed at the output end of the drive unit. The output end of the electromagnetic clutch assembly and the grinding wheel shaft are connected by a transmission assembly.
[0009] Furthermore, a detection component is fixedly installed at the end of the support frame near the milling cutter. When the detection component moves away from the screw, it inputs an electrical signal to the control unit, thereby enabling the drive unit to drive the grinding wheel to grind the screw defects.
[0010] Furthermore, a piston base plate is movably fitted inside the bottom of the collection and positioning box, and a traction block is fixedly installed on the surface of the piston base plate. An exhaust groove is opened on the top of the outer side of the traction block, and an exhaust stop seat pushed by a spring is movably installed on the top of the outer side of the traction block and on one side of the exhaust groove. An adjusting gear is fixedly installed at the bottom of the exhaust stop seat, and a transmission gear that meshes with the outer teeth of the adjusting gear is fixedly installed at the output end of the drive unit.
[0011] Furthermore, a detection push spring is fixedly installed at the bottom of the collection and positioning box, located below the piston base plate.
[0012] Furthermore, the bottom of the collection and positioning box is fixedly equipped with a detection switch for detecting the position of the piston base plate and a bell that warns the piston base plate to have descended to the correct position.
[0013] Furthermore, a chip removal assembly is fixedly installed at the bottom of the piston base plate.
[0014] A method of using a screw milling device includes the following steps: S1. When the screw is installed, its end passes through the inside of the collection positioning box and the middle positioning plate. It is first clamped and secured by the three-jaw chuck, and then the other end of the screw is limited by the ejector pin, thus completing the three-point limiting of the two ends and the middle of the screw.
[0015] S2. The three-jaw chuck is rotated by a control unit fixed on the side of the machine tool, which in turn rotates the screw.
[0016] S3. After the screw is locked and tightened, the vertical movement component is used to adjust the milling cutter to move up and down closer to the screw, and the rotation and drive component is used to adjust the deflection of the milling cutter to mill the required thread groove.
[0017] S4. The control unit regulates the rotation of the milling cutter to perform milling operations on the outer side of the screw. At the same time, the control unit uses a three-jaw chuck to regulate the rotation of the screw and causes the collection and positioning box to move directionally along the transverse component, so that the milling cutter can mill along the outer side of the screw and complete the milling of the screw groove on the outer side of the screw.
[0018] S5. When the collecting and positioning box moves along the transverse component, it drives the intermediate positioning plate to move synchronously. The collecting and positioning box drives the intermediate positioning plate to achieve free positioning of the outer part of the screw.
[0019] The present invention has the following beneficial effects: This invention provides a screw milling device and its method of use, in which the milling cutter is completely enclosed in a collection and positioning box. When the milling cutter performs milling operations on the screw, the debris is collected within the internal space of the collection and positioning box due to its enclosure function. This avoids the problem of debris scattering everywhere during traditional milling, improves the working environment, and reduces the pollution and potential hazards of debris to the equipment and the surrounding environment.
[0020] Furthermore, a central positioning plate is installed on the side of the collection and positioning box. The central positioning plate is secured with bolts, ensuring its stability and reliability. The central positioning plate and the screw are connected via a sleeve connection, which facilitates installation and disassembly for easy loading and unloading of the screw.
[0021] During the screw installation and positioning process, a three-jaw chuck and a pin clamp and limit the screw at both ends, providing a stable foundation support. Simultaneously, an intermediate positioning plate further limits the outer portion of the screw. Moreover, the intermediate positioning plate has the characteristic of moving synchronously with the collecting positioning box, ensuring it remains close to the cutting area throughout the milling operation. This allows the intermediate positioning plate to continuously and closely limit the screw based on its movement along its outer edge, effectively preventing axial runout during cutting. Attached Figure Description
[0022] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.
[0023] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the positioning box of the present invention; Figure 3 This is a schematic diagram of the internal planar structure of the positioning box of the present invention; Figure 4 This is a schematic diagram showing the installation position and three-dimensional structure of the support frame of the present invention; Figure 5 This is a schematic diagram showing the position and three-dimensional structure of each component on the piston base plate of the present invention; Figure 6 This is a schematic diagram of the working state of the screw during milling according to the present invention.
[0024] In the diagram: 1. Machine tool; 2. Control unit; 3. Collection and positioning box; 301. Horizontal movement assembly; 302. Intermediate positioning plate; 303. Filter plate; 4. Vertical movement assembly; 401. Rotation and drive assembly; 5. Milling cutter; 6. Coolant pipe; 7. Support frame; 8. Grinding wheel; 9. Detection piece; 10. Transmission assembly; 11. Drive unit; 12. Electromagnetic clutch assembly; 13. Traction block; 130. Exhaust duct; 14. Exhaust stop; 15. Adjustment gear; 16. Piston base plate; 161. Chip removal assembly; 162. Detection push spring; 17. Detection switch; 18. Bell body; 19. Transmission gear. Detailed Implementation
[0025] 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.
[0026] Example 1, please refer to Figure 1 As can be seen, machine tool 1 is positioned at the required location using the four support legs at its bottom corners. A three-jaw chuck and a ejector pin are symmetrically arranged on the inner side of machine tool 1. The three-jaw chuck clamps and secures one end of the screw, while the ejector pin abuts against the other end of the screw, thus limiting the movement of both ends. Then, the control unit 2, fixedly mounted on the side of machine tool 1, controls the rotation of the three-jaw chuck, thereby rotating the screw.
[0027] In practical applications, to prevent the chips generated after screw milling from flying everywhere, combined with Figures 1-3It can be seen that the side of the machine tool 1 has a collection and positioning box 3 movably connected to the transverse moving assembly 301. The transverse moving assembly 301 mainly includes a guide rail, a lead screw, and a servo motor. The servo motor uses the lead screw to drive the collection and positioning box 3 to move laterally along the transverse moving assembly 301, i.e., in the X-axis direction, ensuring that the movement direction of the collection and positioning box 3 is relatively parallel to the lead screw after clamping. The inner wall of the collection and positioning box 3 is provided with a vertical moving assembly 4. The vertical moving assembly 4 has the same function as the transverse moving assembly 301. After being controlled by the control unit 2, the vertical moving assembly 4 can move up and down along the vertical direction, i.e., in the Z-axis direction. A rotation and drive assembly 401 is fixedly mounted on the surface of the vertical moving assembly 4, and a milling cutter 5 is fixedly mounted on the output shaft of the rotation and drive assembly 401. On the one hand, the rotation and drive assembly 401 is provided with a power unit, generally a motor, to drive the milling cutter 5; on the other hand, the rotation and drive assembly 401 can deflect the milling cutter 5. In this way, after the screw is secured by the three-jaw chuck and ejector pin on machine tool 1, the outer part of the screw is located inside the collection and positioning box 3. The milling cutter 5 is adjusted up and down according to the vertical movement component 4 until it approaches the screw to perform the milling operation. The rotation and drive component 401 adjusts the deflection of the milling cutter 5 to ensure that it can mill the required thread groove. Then, the control unit 2 controls the milling cutter 5 to rotate at high speed to perform milling on the outer part of the screw; the control unit 2 uses the three-jaw chuck to control the screw to rotate at low speed, and the collection and positioning box 3 moves directionally along the horizontal movement component 301, enabling the milling cutter 5 to mill along the outer part of the screw, ultimately completing the thread groove milling on the outer part of the screw. During this process, because the milled part of the screw is located inside the collection and positioning box 3, the milling debris is collected inside the collection and positioning box 3, thus avoiding the problem of debris flying everywhere after cutting.
[0028] Based on this, combined Figure 3 As can be seen, the side of the collecting and positioning box 3 has an intermediate positioning plate 302 that is bolted on, and the intermediate positioning plate 302 is fitted to the outer side of the screw. Therefore, it can be seen that when different types of screws need to be processed, only the corresponding model of the intermediate positioning plate 302 needs to be disassembled and replaced.
[0029] During installation, the screw, after passing through the inside of the collecting and positioning box 3 and the intermediate positioning plate 302, is first clamped and secured by a three-jaw chuck, and then the other end of the screw is limited by a center pin. This completes the three-point limiting of the screw at both ends and the middle. Since the intermediate positioning plate 302 is fixed to the collecting and positioning box 3, it moves synchronously along the transverse component 301. The collecting and positioning box 3 drives the intermediate positioning plate 302 to achieve free limiting of the outer part of the screw, thus achieving fixed limiting at both ends and free limiting in the middle. This method ensures that the intermediate positioning plate 302 remains close to the screw's milling position, preventing axial runout of the milled part due to lateral cutting forces.
[0030] Example 2 is a further development based on Example 1. Please refer to [link / reference]. Figure 1 and Figure 3 It can be seen that a coolant pipe 6 is fixedly installed at the end of the rotary and drive assembly 401, oriented towards the milling cutter 5. The coolant pump can spray coolant from the coolant pipe 6 towards the milling cutter 5, thereby cooling the milling cutter 5 and the screw. Therefore, the continuously sprayed coolant simultaneously cools the tool and the screw. Furthermore, to further prevent thermal deformation of the screw due to continuous cutting, combined with... Figure 1 It can be seen that the screw is arranged at an angle relative to the ground, with the angle limited to between 20° and 75°. Therefore, as... Figure 3 and Figure 6 As shown, the three-jaw chuck, ejector pin, and collection and positioning box 3 used to hold the screw are all arranged at an angle. When the coolant pipe 6 continuously discharges the coolant, the coolant will flow out from the lower outer part of the collection and positioning box 3 after the coolant inside the collection and positioning box 3 increases due to the angled arrangement.
[0031] Meanwhile, a filter disc 303 is movably installed on the outside of the collection and positioning box 3, and the filter disc 303 and the intermediate positioning disc 302 are arranged symmetrically, with a gap between the inner side of the filter disc 303 and the screw. During the milling process of the milling cutter 5 on the screw, the coolant pipe 6 continuously sprays coolant to cool the milling cutter 5 and the screw. As the waste chips and coolant fall into the collection and positioning box 3, the waste chips will accumulate at the bottom of the inner side of the collection and positioning box 3 due to gravity, while the coolant will be located on top. Figure 3 and Figure 6As shown, since the intermediate positioning plate 302 is relatively higher than the filter plate 303, the coolant will first flow out along the gap between the screw and the filter plate 303. In this way, the coolant will continuously flow downwards along the screw, forcing the entire outer part of the screw to be immersed in the coolant. Compared to current horizontal screw milling, this cooling method, where the screw is completely immersed in the coolant, effectively cools the screw. Furthermore, because the gap between the filter plate 303 and the screw can filter the coolant, allowing it to flow out normally from the gap, the milling debris is still filtered into the collection and positioning box 3, achieving coolant filtration. Moreover, even if clogging occurs between the filter plate 303 and the screw during filtration, combined with... Figure 2 and Figure 6 As can be seen, in this application, the milling direction of the milling cutter 5 is from the high part to the low part of the screw. This causes the collection and positioning box 3 to move downward along the screw axis. The screw moves to the right relative to the filter disc 303, which is opposite to the direction in which the coolant flows out of the filter disc 303. By utilizing the relative movement between the screw and the filter disc 303, the waste debris blocked on the outside of the filter disc 303 and the screw can be pushed towards the inside of the collection and positioning box 3, thereby avoiding the problem of poor filtration caused by waste debris clogging between the filter disc 303 and the screw.
[0032] Example 3 is a further improvement on Example 2. During production, the outer side of the screw may have some protruding defects (such as burrs). If these are not repaired, the screw will be unable to pass properly through the intermediate positioning plate 302, causing obstruction of the movement of the collection positioning box 3. To solve this problem, combined with... Figures 2-4It can be seen that a support frame 7, which is limited by a guide rail, is movably installed on the inner wall of the collection and positioning box 3, and a grinding wheel 8 is movably installed in the middle of the support frame 7, with the grinding wheel 8 located above the screw. A drive unit 11 is fixedly installed at one end of the support frame 7, and an electromagnetic clutch assembly 12 installed on the inner wall of the support frame 7 is fixedly installed at the output end of the drive unit 11. The main function of the electromagnetic clutch assembly 12 is to realize the output and cut-off of power using electronic control. It can be purchased on the market. The output end of the electromagnetic clutch assembly 12 and the rotating shaft of the grinding wheel 8 are connected by a transmission assembly 10. The transmission assembly 10 is not limited to belt or chain drive. A detection element 9 is fixedly installed at the end of the support frame 7 near the side of the milling cutter 5. Under normal conditions, the detection element 9 is a momentary switch. When the grinding wheel 8 and the detection element 9 are attached to the outside of the screw, the switch is pressed and sends an electrical signal to the control unit 2, so that the drive unit 11 and the electromagnetic clutch assembly 12 stop working. When the screw is fed towards the milling cutter 5, if a protruding defect appears on the outer side of the screw, it will first come into contact with the grinding wheel 8 and move upward. As the grinding wheel 8 drives the support frame 7 and the detection piece 9 to move upward synchronously, the detection piece 9 moves away from the screw, causing it to disconnect and send an electrical signal to the control unit 2. The control unit 2 then starts the drive unit 11 and the electromagnetic clutch assembly 12, thereby enabling the drive unit 11 to drive the grinding wheel 8 to rotate rapidly. The grinding wheel 8 then grinds the protruding defect. During this process, because the three-jaw chuck holding the screw stops rotating synchronously after the detection piece 9 disconnects, there is sufficient time for the grinding wheel 8 to grind the protruding defect while rotating rapidly.
[0033] Furthermore, in order to ensure that the grinding wheel 8 can enhance the grinding strength of the screw during grinding, combined with... Figures 3-5 It can be seen that the bottom of the inner side of the collection and positioning box 3 has a piston base plate 16 that is movably fitted with a sealing ring, and a traction block 13 is fixedly installed on the surface of the piston base plate 16. An exhaust groove 130 is opened on the top of the outer side of the traction block 13. The interior of the collection and positioning box 3 is connected to the outside through the exhaust groove 130 and the inner cavity of the traction block 13. Correspondingly, an exhaust stop 14 is movably installed on the top of the outer side of the traction block 13 and on one side of the exhaust groove 130. It is pushed downward by a spring. The exhaust stop 14 blocks the exhaust groove 130. An adjusting gear rack 15 is fixedly installed at the bottom of the exhaust stop 14, and a transmission gear 19 that meshes with the outer teeth of the adjusting gear rack 15 is fixedly installed at the output end of the drive unit 11. When the drive unit 11 drives the transmission gear 19 to rotate, it forces the transmission gear 19 to push the adjusting gear rack 15 to move upward. The bottom of the collection positioning box 3 is fixedly installed with a detection push spring 162 located below the piston base plate 16, and the bottom of the collection positioning box 3 is fixedly installed with a detection switch 17 for detecting the position of the piston base plate 16 and a bell 18 for warning the piston base plate 16 to descend into position.
[0034] In practical application of this embodiment, under normal conditions, the piston base plate 16 presses against the top of the detection spring 162, and the area above the piston base plate 16 is used for the accumulation of coolant and debris. The drive unit 11 and the electromagnetic clutch assembly 12 are in a stopped state, and the grinding wheel 8 and the detection element 9 are pressed against the outer side of the screw.
[0035] Under normal conditions, as the collecting and positioning box 3 moves to the left along the screw, the milling cutter 5 mills the screw, and the milling chips fall onto the piston base plate 16. The coolant then flows out through the gap between the filter plate 303 and the screw.
[0036] If there is a protrusion defect on the outer side of the screw, after the protrusion passes through the filter disc 303, it will first pass through the grinding wheel 8 and push the grinding wheel 8 to drive the support frame 7 to move upward. After the detection piece 9 disengages from the screw, it will send an electrical signal to the control unit 2, and start the drive unit 11 and the electromagnetic clutch assembly 12 to work. At the same time, the chuck will also stop driving the screw to rotate, the milling work will stop, and only the grinding wheel will start grinding. When the drive unit 11 drives the electromagnetic clutch assembly 12 to rotate, the electromagnetic clutch assembly 12 causes the grinding wheel 8 to grind the protrusion defect through the transmission assembly 10. On the other hand, when the drive unit 11 drives the transmission gear 19 to rotate, the meshing between the transmission gear 19 and the adjusting gear rack 15 will cause the exhaust stop 14 to move upward and release the blockage of the exhaust groove 130. When the adjusting gear rack 15 further pushes the exhaust stop 14 upward, the exhaust stop 14 drives the piston base plate 16 to move upward through the traction block 13. The piston base plate 16 moves upward and separates from the detection push spring 162. Based on this, during the actual deployment process, the filter disc 303, which is movably installed on the side of the collection positioning box 3, tends to move away from the collection positioning box 3 due to the spring force. A position detection component, such as a switch or position sensor, can also be installed on the side of the collection positioning box 3. Once the protrusion defect on the outside of the screw cannot pass through the filter disc 303, the screw will squeeze the filter disc 303 and compress the spring at the same time until the detection component is turned on and inputs a signal to the control system, thereby stopping the continued movement of the collection positioning box 3 and avoiding the problem of the collection positioning box 3 being obstructed due to the protrusion defect.
[0037] Subsequently, as the piston base plate 16 moves upward, excess air at the top of the inner cavity of the collection positioning box 3 is discharged outward from the exhaust groove 130 and the traction block 13. Furthermore, the traction block 13 contains debris and coolant. When the traction block 13 drives the piston base plate 16 upward, the weight of the debris and coolant on the piston base plate 16 is applied to the adjusting gear rack 15 through the traction block 13. When the transmission gear 19 drives the adjusting gear rack 15 upward through gear meshing until the bottom of the adjusting gear rack 15 disengages from the transmission gear 19, the transmission gear 19 relatively increases the downward pressure of the support frame 7, forcing an increase in the contact strength between the grinding wheel 8 and the protruding defect, further increasing the grinding strength of the protrusion. Using this method, it can be ensured that the grinding wheel 8 normally adheres to the outside of the screw and does not affect the screw input and milling. However, if a protruding defect appears on the outside of the screw, the weight applied to the protrusion by the support frame 7 will increase accordingly, ensuring that the grinding wheel 8 has sufficient grinding strength against the protruding defect.
[0038] After the grinding wheel 8 grinds away the protruding defect, the support frame 7 drives the detection piece 9 downward. After the detection piece 9 contacts the screw again, it inputs an electrical signal to the control unit 2, causing the drive unit 11 and the electromagnetic clutch assembly 12 to stop working, and the whole machine restarts. Next, the exhaust baffle 14, pushed by the spring, will block the exhaust groove 130 again, and the piston base plate 16 will move downward under the weight of the coolant and waste. During the downward movement of the piston base plate 16, the pressure inside the collection positioning box 3 will decrease relatively. At this time, the external airflow can only enter through the gap between the filter plate 303 and the screw and the screw groove at the intermediate positioning plate 302. After the airflow enters the collection positioning box 3 through the gap between the filter plate 303 and the screw, it has the tendency to clear the gap between the filter plate 303 and the screw by reverse airflow impact. Moreover, since the airflow cannot quickly replenish the inside of the collection positioning box 3, the pressure inside the collection positioning box 3 is reduced to prevent the piston base plate 16 from falling quickly. Finally, when the piston base plate 16 descends and reaches the detection spring 162, the spring force of the detection spring 162 is used to buffer the downward movement of the piston base plate 16.
[0039] As the waste debris is collected inside the collection and positioning box 3 for an extended period, the amount of debris above the piston base plate 16 increases, leading to a continuous increase in its weight. This, in turn, increases the pressure exerted by the piston base plate 16 on the detection spring 162. When the piston base plate 16 presses against the bell body 18, it also triggers a signal from the detection switch 17, which is then input to the control unit 2. At this time, the control unit 2 only controls the drive unit 11 to rotate, while the electromagnetic clutch assembly 12 remains disengaged. When the drive unit 11 engages with the adjusting gear rack 15 and pushes the traction block 13 to move the piston base plate 16 upward, the piston base plate 16 moves away from the detection switch 17 and the bell body 18. After the piston base plate 16 moves away from the detection switch 17, the detection switch 17 again inputs an electrical signal to the control unit 2, causing the drive unit 11 to stop working. Subsequently, the piston base plate 16 moves downward under gravity and impacts the bell body 18, triggering another signal from the detection switch 17. This cycle continues, ensuring that the piston base plate 16 moves up and down to impact the bell 18, causing the bell 18 to make a sound, thus alerting the operator that too much debris has accumulated above the piston base plate 16 and needs to be cleaned.
[0040] For cleaning the debris above the piston base plate 16, a chip removal assembly 161 is fixedly installed at the bottom of the piston base plate 16. Under normal circumstances, the chip removal assembly 161 is in the closed state. When it is necessary to remove the debris above the piston base plate 16, the chip removal assembly 161 can be opened.
Claims
1. A screw milling device, characterized in that, include: The machine tool (1) uses a three-jaw chuck and a ejector pin to limit and fasten both ends of the screw. The side of the machine tool (1) is equipped with a control unit (2) that controls the rotation of the screw by the three-jaw chuck. The collection and positioning box (3) is movably mounted on the machine tool (1) using the transverse component (301). The inner side is provided with a vertical component (4). The vertical component (4) uses a rotation and drive component (401) to drive the milling cutter (5) to perform milling work on the screw. The outer part of the screw is located inside the collection and positioning box (3), so that the milling debris is concentrated inside the collection and positioning box (3). The intermediate positioning plate (302) is fixed on the side of the collecting positioning box (3), and the intermediate positioning plate (302) is sleeved and connected to the outer side of the screw; the intermediate positioning plate (302) moves with the collecting positioning box (3) and changes the limiting position on the middle part of the screw to prevent axial runout during the milling of the long screw; The end of the rotating and driving assembly (401) is fixedly mounted with a coolant pipe (6) arranged in the direction of the milling cutter (5); The three-jaw chuck, ejector pin, and collection and positioning box (3) for holding the screw are all arranged at an angle so that the coolant flows along the screw and the coolant wraps around the screw to cool it down. A filter disc (303) is movably installed on the outside of the collection and positioning box (3), and a gap is left between the inner side of the filter disc (303) and the screw for filtering the coolant.
2. The screw milling device according to claim 1, characterized in that, The inner wall of the collection positioning box (3) is movably installed with a support frame (7), and a grinding wheel (8) located above the screw is movably installed in the middle of the support frame (7). A drive unit (11) is fixedly installed at one end of the support frame (7), and an electromagnetic clutch assembly (12) is fixedly installed at the output end of the drive unit (11). The output end of the electromagnetic clutch assembly (12) and the shaft of the grinding wheel (8) are connected by a transmission assembly (10).
3. The screw milling device according to claim 2, characterized in that, The support frame (7) has a detection component (9) fixedly installed at the end near the milling cutter (5). When the detection component (9) is away from the screw, it inputs an electrical signal to the control unit (2) so that the drive unit (11) drives the grinding wheel (8) to grind the screw defect.
4. The screw milling device according to claim 2, characterized in that, The bottom of the collection positioning box (3) is movably fitted with a piston base plate (16), and a traction block (13) is fixedly installed on the surface of the piston base plate (16). An exhaust groove (130) is opened on the top of the outer side of the traction block (13). An exhaust stop seat (14) pushed by a spring is movably installed on the top of the outer side of the traction block (13) and on one side of the exhaust groove (130). An adjusting gear row (15) is fixedly installed at the bottom of the exhaust stop seat (14). A transmission gear (19) that meshes with the outer teeth of the adjusting gear row (15) is fixedly installed at the output end of the drive unit (11).
5. The screw milling device according to claim 4, characterized in that, The bottom of the collection positioning box (3) is fixedly installed with a detection push spring (162) located below the piston base plate (16).
6. The screw milling device according to claim 4, characterized in that, The bottom of the collection positioning box (3) is fixedly equipped with a detection switch (17) to detect the position of the piston base plate (16) and a bell (18) to warn the piston base plate (16) to descend into position.
7. The screw milling device according to claim 4, characterized in that, A chip removal assembly (161) is fixedly installed at the bottom of the piston base plate (16).
8. A method of using the screw milling device as described in claim 1, characterized in that, Includes the following steps: S1. When the screw is installed, its end passes through the inside of the collection positioning box (3) and the middle positioning plate (302), and is first clamped and secured by the three-jaw chuck. Then, the other end of the screw is limited by the ejector pin, thus completing the three-point limit of the two ends and the middle of the screw. S2. The screw is rotated by controlling the rotation of the three-jaw chuck through the control unit (2) fixedly installed on the side of the machine tool (1); S3. After the screw is locked and tightened, the milling cutter (5) is adjusted to move up and down to approach the screw by the vertical movement component (4), and the rotation and drive component (401) is adjusted to deflect the milling cutter (5) to mill out the required screw groove. S4. The control unit (2) controls the milling cutter (5) to rotate and perform milling operation on the outer side of the screw. At the same time, the control unit (2) uses a three-jaw chuck to control the rotation of the screw and causes the collection positioning box (3) to move in a direction along the transverse component (301) so that the milling cutter (5) can mill along the outer side of the screw and complete the screw groove milling work on the outer side of the screw. S5. When the collecting positioning box (3) moves along the transverse component (301), it drives the intermediate positioning disk (302) to move synchronously. The collecting positioning box (3) drives the intermediate positioning disk (302) to achieve free positioning of the outer part of the screw.