A CNC thread milling machine

Abstract

The present invention discloses a CNC thread milling machine, and relates to the technical field of thread milling machines. The CNC thread milling machine comprises a workbench and a three-axis CNC milling machine arranged at one end of the workbench, and also comprises a fixed seat, the fixed seat is arranged on the upper surface of the workbench, and a turntable is rotatably installed at one end of the fixed seat close to the three-axis CNC milling machine, and a driving member for driving the turntable to rotate intermittently is provided on the fixed seat. The CNC thread milling machine, through the cooperation of the pushing pipe, the unloading pipe and the through hole, can enable the first push rod to push the workpiece through the through hole into the inside of the workpiece slot to realize automatic loading of the workpiece, and the second push rod enters the inside of the workpiece slot through the through hole, thereby pushing the workpiece inside the workpiece slot out to realize automatic unloading of the workpiece, and in this process, as the turntable rotates, the unprocessed workpiece will approach the cutter disc, and under the action of the cutter disc, the milling of the workpiece is realized, and the whole process is continuous, thereby improving the working efficiency of the device.

Description

Technical Field

[0001] The invention relates to the technical field of thread milling machines, in particular to a numerically controlled thread milling machine. Background Art

[0002] A thread milling machine is a milling machine that is specially used to process spiral grooves on workpieces. It is widely used in the processing of various hardware tools with threads and can mill various multi-start threads. However, most CNC thread milling machines on the market currently require manual loading and unloading, which not only poses certain safety hazards, but also affects work efficiency.

[0003] The Chinese patent with publication number CN106001792A discloses a portable three-axis CNC thread milling machine. The device forms a self-rotation motion through a synchronous belt transmission mechanism and a revolution motion through a three-axis linkage, so that the cutting process starts with inward feed milling and then converts into a spiral radial feed motion into the workpiece. The thread is milled in a 360-degree spiral feed process, so that the processed thread has higher precision and higher processing efficiency.

[0004] The Chinese patent with publication number CN213794638U discloses a thread milling machine, which can ensure uniform unloading of steel rolls by setting a unloading rotating roller and an inclined plate. By setting a No. 2 electric telescopic rod and a pushing block, the steel roll can be automatically pushed to the clamping device, thereby realizing automatic and efficient loading, effectively saving human resources and improving work efficiency.

[0005] However, most of the automatic loading milling machines on the market currently load materials discontinuously, that is, the milling machine needs to complete the process and unload the materials manually before it can continue to load the workpiece. During this process, the milling machine does not perform milling work, which will affect the production and processing efficiency of the milling machine. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a numerically controlled thread milling machine, which solves the problems raised in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a CNC thread milling machine, comprising a workbench and a three-axis CNC milling machine arranged at one end of the workbench, and also comprising a fixed seat, the fixed seat is arranged on the upper surface of the workbench, and a turntable is rotatably installed at one end of the fixed seat close to the three-axis CNC milling machine, a driving member for driving the turntable to rotate intermittently is provided on the fixed seat, a workpiece groove is radially opened on the side of the turntable facing the three-axis CNC milling machine, and a through hole adapted to the workpiece groove is opened in the turntable; an active cavity, the active cavity is opened at the middle position of the turntable, and a guide block is movably installed inside the active cavity, a pressure rod is movably installed on the inner wall of the active cavity, and one end of the pressure rod extends A material pushing pipe is fixed in a fixed seat, a feeding channel is provided on one side of the pushing pipe, and a first push rod is provided in the pushing pipe for axial sliding, a material discharging pipe is fixed on one side of the pushing pipe, and a second push rod is provided in the pushing pipe for axial sliding, the distance between the pushing pipe and the material discharging pipe is the same as the distance between two adjacent through holes, and the vertical distance between the pushing pipe and the material discharging pipe to the straight line where the axis of the turntable is located is the same as the vertical distance between the through hole and the straight line where the axis of the turntable is located.

[0008] Furthermore, the guide block is a conical structure as a whole, the end of the guide block close to the three-axis CNC milling machine is a small head end, and the other end of the guide block is a large head end, the maximum vertical distance from the outer edge of the large head end to the axis of the turntable is three times the maximum vertical distance from the outer edge of the small head end to the axis of the turntable, and the minimum vertical distance from the outer edge of the large head end to the axis of the turntable is the same as the minimum vertical distance from the outer edge of the small head end to the axis of the turntable; the guide block is located on one side of the arc surface to form a pressure part, the pressure part squeezes the pressure rod to move the pressure rod toward the direction away from the axis of the turntable, and the guide block forms a release part on the side opposite to the arc surface, the release part is used to release the elastic potential energy of the reset spring so that the pressure rod moves toward the axis of the turntable.

[0009] Furthermore, there are four workpiece slots in total, and the cross-section of the workpiece slot is an isosceles triangle structure, and the bottom side of the workpiece slot is close to the axis of the turntable.

[0010] Furthermore, a second servo motor is fixed inside the fixed seat, and a reverse double-threaded rod is installed at the output end of the second servo motor, and a bidirectional thread groove is provided on the outer side of the reverse double-threaded rod; a connecting seat is fixed at one end of the first push rod and the second push rod away from the three-axis CNC milling machine, and a connecting hole is opened on the connecting seat, and a sliding block adapted to the bidirectional thread groove is rotatably installed inside the connecting hole.

[0011] Furthermore, one end of the pressing plate away from the three-axis CNC milling machine is a slope structure, and elastic plates are installed on both sides of the pressing plate, and the elastic plates are against the side walls of the workpiece groove.

[0012] Furthermore, a fixing plate for fixing a pushing pipe and a discharging pipe is symmetrically installed inside the fixing seat, a first cylinder is installed on the fixing plate, and a connecting plate is installed on the telescopic end of the first cylinder; a push rod slidably connected to the fixing plate is fixed at one end of the guide block away from the three-axis CNC milling machine, and the other end of the push rod is fixedly connected to the connecting plate.

[0013] Furthermore, a material discharge groove is provided on the upper surface of the workbench, and a material receiving groove connected to the material discharge groove is provided at the bottom of the workbench; a protective box is fixed to the end of the fixed seat away from the turntable, a box cover is hinged on one side of the protective box, and the protective box and the box cover are connected by snap-fitting on the other side.

[0014] Furthermore, the driving member includes a first servo motor fixed on the outside of the fixed seat and a first driven pulley fixed on the outside of the turntable, a first driving pulley is installed at the output end of the first servo motor, and a first synchronous belt is installed between the first driving pulley and the first driven pulley.

[0015] Furthermore, the three-axis CNC milling machine includes a base fixed to one end of the workbench, a support frame is slidably installed above the base in a vertical direction, and a third cylinder for driving the support frame to move is installed on the base, a bearing slide is slidably installed on the upper surface of the support frame along its axial direction, a spindle box is fixed on the upper surface of the bearing slide, a second cylinder is rotatably installed inside the spindle box, and a cutter disc is fixed at the telescopic end of the second cylinder; a fourth servo motor is fixed to one end of the support frame, a screw rod is installed at the output end of the fourth servo motor, a connecting nut seat is fixed to the bottom of the bearing slide, and the connecting nut seat is threadedly connected to the screw rod.

[0016] Furthermore, a third servo motor is fixed inside the spindle box, a second driving pulley is installed at the output end of the third servo motor, a second driven pulley is fixedly sleeved on the second cylinder, and a second synchronous belt is installed between the second driven pulley and the second driving pulley.

[0017] The present invention has the following beneficial effects:

[0018] (1) The CNC thread milling machine, through the cooperation of the push pipe, the unloading pipe and the through hole, can enable the first push rod to push the workpiece through the through hole into the workpiece slot to realize automatic loading of the workpiece, and the second push rod enters the workpiece slot through the through hole, thereby pushing the workpiece inside the workpiece slot out to realize automatic unloading of the workpiece. In this process, as the turntable rotates, the unprocessed workpiece will approach the cutter disc, and under the action of the cutter disc, the workpiece is milled. The whole process is continuous, thereby improving the working efficiency of the equipment.

[0019] (2) The CNC thread milling machine rotates the workpiece groove and the pressure rod through the turntable, and then causes the guide block and the workpiece groove and the pressure rod to rotate relative to each other. The guide block and the pressure rod abut against each other, so that the pressure rod can be extended and retracted as the turntable rotates, and then the pressure rod drives the pressure plate to move inside the workpiece groove, thereby achieving clamping and loosening of the workpiece inside the workpiece groove, which is beneficial to the milling and unloading of the workpiece.

[0020] (3) The CNC thread milling machine, through the structural characteristics of the guide block, when the guide block slides axially inside the movable cavity, the guide block will push the pressure rod to move. At this time, the pressure rod will move toward or away from the center of the turntable, which is equivalent to compensating the length of the pressure rod in disguise, so that the pressure rod can adapt to the fixation of workpieces of different specifications, thereby improving the applicability of the equipment.

[0021] (4) The CNC thread milling machine, through the setting of the reset spring, is conducive to the pressure rod always maintaining good contact with the guide block, thereby improving the stability of the equipment during operation. Through the setting of the elastic plate, the pressure plate can effectively push the workpiece to move during the sliding process inside the workpiece groove, thereby preventing the workpiece from being missed between the side wall of the workpiece groove and the pressure plate due to its small outer diameter.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 For the present invention Figure 1 The main view;

[0025] Figure 3 This is a schematic diagram of the structure of the protective box when it is opened in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the three-axis CNC milling machine in the present invention;

[0027] Figure 5 This is a schematic diagram of the installation structure of the push pipe in the present invention;

[0028] Figure 6 For the present invention Figure 5 Another perspective of the picture;

[0029] Figure 7 It is a schematic diagram of the installation structure of the reverse double-threaded rod in the present invention;

[0030] Figure 8 It is a structural schematic diagram of the connecting seat in the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the turntable in the present invention;

[0032] Fig.10 For the present invention Fig. 9 The main view;

[0033] Fig.11 For the present invention Fig. 9 Rear view of

[0034] Fig.12 It is a structural schematic diagram of the guide block in the present invention;

[0035] Fig.13 This is a schematic diagram of the guide block installation structure in the present invention;

[0036] Fig.14 For the present invention Fig.13 The main view;

[0037] Fig.15 It is a schematic diagram of the installation structure of the pressure plate in the present invention.

[0038] In the figure, 1, workbench; 2, material receiving trough; 3, material discharge trough; 4, slide; 5, fixed seat; 6, three-axis CNC milling machine; 601, base; 602, third cylinder; 603, support frame; 604, bearing slide; 605, connecting nut seat; 606, fourth servo motor; 607, screw rod; 608, spindle box; 609, third servo motor; 610, second driving pulley; 611, second driven pulley; 612, second synchronous belt; 613, second cylinder; 614, cutter head; 7, turntable; 8, workpiece slot; 9, protective box; 10, box cover; 11, feed channel; 12, first driven pulley; 13, first servo motor; 14, first A driving pulley; 15, a first synchronous belt; 16, a reverse double-threaded rod; 17, a connecting seat; 18, a first cylinder; 19, a push rod; 20, a guide block; 201, a large head end; 202, a small head end; 203, a pressurizing part; 204, a releasing part; 21, a fixing plate; 22, a connecting plate; 23, a pushing pipe; 24, a feeding slot; 25, a discharging pipe; 26, a first push rod; 27, a second push rod; 28, a bidirectional threaded groove; 29, a second servo motor; 30, a connecting hole; 31, a slider; 32, an annular slide groove; 33, a through hole; 34, a movable cavity; 35, a pressure rod; 36, a reset spring; 37, a pressure plate; 38, an elastic plate; 39, a ball. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0041] See also Figure 1 - Fig.15 The embodiment of the present invention provides a technical solution: a CNC thread milling machine, comprising a workbench 1 and a three-axis CNC milling machine 6 arranged at one end of the workbench 1, the three-axis CNC milling machine 6 and the workbench 1 are slidably connected, and also comprising a fixed seat 5, the fixed seat 5 is arranged on the upper surface of the workbench 1, preferably a slide 4 is installed at the bottom of the fixed seat 5, the slide 4 is slidably connected to the workbench 1, and the slide 4 can be driven by an electric telescopic cylinder for feeding the fixed seat 5, in addition, a turntable 7 is rotatably installed at one end of the fixed seat 5 close to the three-axis CNC milling machine 6, and a driving member for driving the turntable 7 to rotate intermittently is provided on the fixed seat 5, and a workpiece groove 8 is radially opened on the side of the turntable 7 facing the three-axis CNC milling machine 6, the workpiece groove 8 is used to hold the workpiece to be processed, and a through hole 33 adapted to the workpiece groove 8 is opened in the turntable 7.

[0042] In addition, the CNC thread milling machine provided in this embodiment also includes a movable cavity 34, which is opened at the middle position of the turntable 7, and a guide block 20 is movably installed in the movable cavity 34, and a pressure rod 35 is movably installed on the inner wall of the movable cavity 34. One end of the pressure rod 35 extends to the inside of the workpiece groove 8 and is installed with a pressure plate 37. The pressure rod 35 is slidably connected to the turntable 7, and the other end of the pressure rod 35 is against the outer wall of the guide block 20 and is provided with a ball 39. The setting of the ball 39 can make the contact between the pressure rod 35 and the outer surface of the guide block 20 more stable, and a return spring 36 is provided on the outer side of the pressure rod 35 between the ball 39 and the inner wall of the movable cavity 34.

[0043] In this solution, the turntable 7 rotates intermittently, further causing the workpiece slot 8 and the pressure rod 35 to rotate, and then causing the guide block 20 and the workpiece slot 8 and the pressure rod 35 to rotate relative to each other. The guide block 20 and the pressure rod 35 abut against each other, so that the pressure rod 35 can extend and retract as the turntable 7 rotates, that is, the pressure rod 35 will drive the pressure plate 37 to move inside the workpiece slot 8, thereby achieving the clamping and release of the workpiece inside the workpiece slot 8.

[0044] In order to realize the loading of the workpiece, the CNC thread milling machine provided in this embodiment also includes a pushing pipe 23, which is fixed in the fixed seat 5. A feeding channel 11 that penetrates the fixed seat 5 is provided on one side of the pushing pipe 23. Preferably, a feeding slot 24 is opened at the upper end of the pushing pipe 23, and the feeding slot 24 is connected with the other end of the feeding channel 11. In addition, it should be noted that the lower end of the inner part of the feeding channel 11 is an inclined structure, so that the workpiece can automatically slide down into the pushing pipe 23 inside the feeding channel 11. A first push rod 26 is axially slidingly provided in the pushing pipe 23. The first push rod 26 moves toward the direction of the turntable 7, which can push the workpiece inside the pushing pipe 23 to move, so as to The workpiece enters the workpiece groove 8 through the through hole 33. A discharge pipe 25 is fixed on one side of the pushing pipe 23. A second push rod 27 is axially slidably arranged in the discharge pipe 25. Preferably, the length of the second push rod 27 is greater than the first push rod 26, so that during the unloading process, the second push rod 27 can extend into the workpiece groove 8, thereby pushing the workpiece out of the workpiece groove 8. In order to improve the stable contact between the pushing pipe 23 and the discharge pipe 25 and the turntable 7, an annular groove 32 is preferably provided on the back side of the turntable 7. The annular groove 32 is slidably connected to the pushing pipe 23 and the discharge pipe 25 to improve the stability of the pushing pipe 23 and the discharge pipe 25 when the turntable 7 rotates.

[0045] It should be noted that in the present embodiment, the distance between the pushing pipe 23 and the unloading pipe 25 is the same as the distance between two adjacent through holes 33, and the vertical distance from the pushing pipe 23 and the unloading pipe 25 to the straight line where the axis of the turntable 7 is located is the same as the vertical distance from the through hole 33 to the straight line where the axis of the turntable 7 is located, so that after the turntable 7 rotates a certain angle, the pushing pipe 23 and the unloading pipe 25 are docked with the two adjacent through holes 33. In addition, in the present embodiment, the angle between the center of the two adjacent through holes 33 and the line connecting the center of the turntable 7 is the same as the intermittent rotation angle of the turntable 7.

[0046] For this solution, after the workpiece slides into the push pipe 23 through the feed channel 11, the first push rod 26 is driven to move, so that the workpiece passes through the through hole 33 and enters the workpiece slot 8. At this time, as the turntable 7 rotates, the pressure rod 35 is squeezed by the guide block 20, and then the pressure plate 37 is pushed to move toward the workpiece. The workpiece is fixed by the cooperation between the pressure plate 37 and the side wall of the workpiece slot 8. At this time, the reset spring 36 is in a compressed state; the turntable 7 continues to rotate to the three-axis CNC milling machine 6, and the outer surface of the workpiece is continued to be milled by the three-axis CNC milling machine 6. After the workpiece is processed After completion, as the turntable 7 rotates, the reset spring 36 relaxes. At this time, the elastic potential energy of the reset spring 36 drives the pressure rod 35 to move away from the workpiece, further separating the pressure plate 37 from the workpiece, thereby releasing the workpiece. At this time, the next workpiece is slid into the pushing pipe 23 through the feed channel 11, driving the second push rod 27 and the first push rod 26 to move synchronously, so that the second push rod 27 enters the workpiece slot 8 through the through hole 33, thereby pushing the workpiece inside the workpiece slot 8 out, and the first push rod 26 allows the workpiece to pass through the through hole 33 into the next workpiece slot 8.

[0047] like Figure 5 , Figure 6 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13 As shown, the guide block 20 provided in this embodiment is a conical structure as a whole, and the end of the guide block 20 close to the three-axis CNC milling machine 6 is a small head end 202, and the other end of the guide block 20 is a large head end 201, and the maximum vertical distance from the outer edge of the large head end 201 to the axis of the turntable 7 is three times the maximum vertical distance from the outer edge of the small head end 202 to the axis of the turntable 7, and the minimum vertical distance from the outer edge of the large head end 201 to the axis of the turntable 7 is the same as the minimum vertical distance from the outer edge of the small head end 202 to the axis of the turntable 7. Due to the conical structure of the guide block 20, when the guide block 20 slides axially inside the movable cavity 34, the guide block 20 will push the pressure rod 35 to move. At this time, the pressure rod 35 will move toward or away from the center of the turntable 7, which is equivalent to compensating for the length of the pressure rod 35 in disguised form, so that the pressure rod 35 can be adapted to fix workpieces of different specifications, thereby improving the scope of application of the equipment.

[0048] In addition, a pressure-applying portion 203 is formed on one side of the guide block 20 located on the arc surface, and the pressure-applying portion 203 squeezes the pressure rod 35, causing the pressure rod 35 to move away from the axis of the turntable 7, so that the pressure rod 35 drives the pressure plate 37 to squeeze the workpiece, thereby achieving fixation of the workpiece during milling. A release portion 204 is formed on the side of the guide block 20 opposite to the arc surface, and the release portion 204 is used to release the elastic potential energy of the reset spring 36, so that the pressure rod 35 moves toward the axis of the turntable 7, thereby causing the pressure rod 35 to drive the pressure plate 37 to separate from the workpiece, so as to facilitate the loading and unloading of the workpiece.

[0049] like Fig. 9 - Fig.14 As shown, there are four workpiece slots 8 provided in this embodiment, and the cross-section of the workpiece slot 8 is an isosceles triangle structure. Through the setting of the isosceles triangle structure, the workpiece can be squeezed by the side wall of the workpiece slot 8 after falling into the workpiece slot 8, and the pressure plate 37 can be used to achieve three-point fixation of the workpiece to improve the stability of the workpiece during milling. In addition, the base of the isosceles triangle structure is close to the axis of the turntable 7, so that after the workpiece is loaded, it falls to the top corner of the isosceles triangle due to its own gravity, thereby meeting the fixation of workpieces of different specifications.

[0050] like Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in order to realize the synchronous driving of the first push rod 26 and the second push rod 27, in this embodiment, a second servo motor 29 is fixed inside the fixed seat 5, and a reverse double-threaded rod 16 is installed at the output end of the second servo motor 29. A bidirectional thread groove 28 is provided on the outer side of the reverse double-threaded rod 16. A connecting seat 17 is fixed at one end of the first push rod 26 and the second push rod 27 away from the three-axis CNC milling machine 6. A connecting hole 30 is opened on the connecting seat 17. A slider 31 adapted to the bidirectional thread groove 28 is rotatably installed inside the connecting hole 30. Preferably, there are at least two sliders 31 to improve the stability of the connection between the slider 31 and the bidirectional thread groove 28.

[0051] In this solution, the reverse double-threaded rod 16 is driven to rotate by the second servo motor 29, which further causes the bidirectional thread groove 28 on the outside of the reverse double-threaded rod 16 to rotate. Through the cooperation between the bidirectional thread groove 28 and the slider 31, the connecting seat 17 makes a linear reciprocating motion on the reverse double-threaded rod 16, thereby driving the first push rod 26 and the second push rod 27 to move.

[0052] like Figure 3 , Fig.13 , Fig.14 and Fig.15 As shown, in order to improve the stability when loading the workpiece, the end of the pressure plate 37 provided in this embodiment away from the three-axis CNC milling machine 6 is a ramp structure. The ramp structure is used to pull the workpiece during input, which can prevent one end of the workpiece from abutting against the pressure plate 37 during loading, resulting in loading failure, and elastic plates 38 are installed on both sides of the pressure plate 37. The elastic plates 38 abut against the side walls of the workpiece groove 8. Through the setting of the elastic plates 38, the pressure plate 37 can effectively push the workpiece to move during the sliding process inside the workpiece groove 8, thereby preventing the workpiece from being missed between the side walls of the workpiece groove 8 and the pressure plate 37 due to its small outer diameter.

[0053] like Figure 3 , Figure 5 , Fig.13 and Fig.14 As shown, in order to realize the axial movement of the guide block 20, a fixing plate 21 for fixing the pushing pipe 23 and the unloading pipe 25 is symmetrically installed inside the fixing seat 5, and a first cylinder 18 is installed on the fixing plate 21. A connecting plate 22 is installed at the telescopic end of the first cylinder 18. A push rod 19 slidably connected to the fixing plate 21 is fixed at one end of the guide block 20 away from the three-axis CNC milling machine 6, and the other end of the push rod 19 is fixedly connected to the connecting plate 22.

[0054] In this solution, the first cylinder 18 drives the connecting plate 22 to move, so that the connecting plate 22 drives the push rod 19 to move, and further the axial movement of the guide block 20 can be achieved.

[0055] like Figure 1 - Figure 4 As shown, in order to facilitate the output of the workpiece and milling debris during the milling process, a discharge groove 3 is opened on the upper surface of the workbench 1, and a receiving groove 2 connected to the discharge groove 3 is provided at the bottom of the workbench 1. Preferably, a filtering screen is arranged on the receiving groove 2 to separate the processed workpiece from the milling debris, so as to facilitate the rapid picking up of the workpiece after processing.

[0056] In order to protect the movement of the reverse double-threaded rod 16, the first push rod 26 and the second push rod 27, a protection box 9 is fixed to the end of the fixed seat 5 away from the turntable 7. A box cover 10 is hinged on one side of the protection box 9, and the other side of the protection box 9 and the box cover 10 are connected by snap-fitting.

[0057] like Figure 3 As shown, in order to realize the driving of the turntable 7, the driving member provided in this embodiment includes a first servo motor 13 fixed to the outside of the fixing seat 5 and a first driven pulley 12 fixedly sleeved on the outside of the turntable 7, a first driving pulley 14 is installed at the output end of the first servo motor 13, and a first synchronous belt 15 is installed between the first driving pulley 14 and the first driven pulley 12.

[0058] In this solution, the first servo motor 13 drives the first driving pulley 14 to rotate, and the first synchronous belt 15 drives the first driven pulley 12 to rotate through the first driving pulley 14, thereby realizing the rotation of the turntable 7.

[0059] It should be noted that, since the turntable 7 rotates intermittently, a ratchet transmission can also be used to drive the turntable 7 .

[0060] like Figure 3 and Figure 4As shown, the three-axis CNC milling machine 6 provided in this embodiment includes a base 601 fixed to one end of the workbench 1, a support frame 603 is slidably installed above the base 601 along the vertical direction, and a third cylinder 602 for driving the support frame 603 to move is installed on the base 601, a bearing slide 604 is slidably installed on the upper surface of the support frame 603 along its axial direction, a spindle box 608 is fixed on the upper surface of the bearing slide 604, a second cylinder 613 is rotatably installed inside the spindle box 608, and a tool disc 614 is fixed at the telescopic end of the second cylinder 613.

[0061] In this solution, the longitudinal movement of the cutter disc 614 is achieved by driving the third cylinder 602, and the cutter disc 614 can be adjusted to any position within a single horizontal plane by extending and retracting the second cylinder 613 and sliding the supporting slide 604 on the upper surface of the support frame 603, thereby realizing three-axis linkage of the cutter disc 614.

[0062] In addition, a fourth servo motor 606 is fixed at one end of the support frame 603, a screw rod 607 is installed at the output end of the fourth servo motor 606, a connecting nut seat 605 is fixed at the bottom of the supporting slide 604, the connecting nut seat 605 is threadedly connected to the screw rod 607, the screw rod 607 is driven to rotate by the fourth servo motor 606, and the threaded connection between the screw rod 607 and the connecting nut seat 605 drives the supporting slide 604 to slide on the upper surface of the support frame 603.

[0063] like Figure 3 As shown, in order to realize the rotation of the cutter disc 614, in this embodiment, a third servo motor 609 is fixed inside the spindle box 608, a second driving pulley 610 is installed at the output end of the third servo motor 609, a second driven pulley 611 is fixedly sleeved on the second cylinder 613, and a second synchronous belt 612 is installed between the second driven pulley 611 and the second driving pulley 610.

[0064] The third servo motor 609 drives the second driving pulley 610 to rotate, and the second driven pulley 611 drives the second cylinder 613 to rotate through the second driving pulley 610, so that the cutter head 614 rotates synchronously with the second cylinder 613, thereby realizing workpiece milling.

[0065] When in use (working), when in use, the first servo motor 13 drives the first active pulley 14 to rotate, and the first synchronous belt 15 drives the first driven pulley 12 to rotate through the first active pulley 14, thereby realizing the rotation of the turntable 7, and the workpiece is put into the feed channel 11. After the workpiece slides through the feed channel 11 to the inside of the pushing pipe 23, the second servo motor 29 is started, and the reverse double-threaded rod 16 is driven to rotate by the second servo motor 29, and the bidirectional thread groove 28 on the outer side of the reverse double-threaded rod 16 is further rotated. Through the cooperation between the bidirectional thread groove 28 and the slider 31, the connecting seat 17 makes a linear reciprocating motion on the reverse double-threaded rod 16, and then drives the first push rod 26 and the second push rod 27 to move, and by driving the first push rod 26 to move toward the turntable 7, the workpiece enters the workpiece groove 8 through the through hole 33.

[0066] At this time, as the turntable 7 rotates, the pressure rod 35 moves to the pressure-applying part 203, and the pressure rod 35 is squeezed by the guide block 20, and then pushes the pressure plate 37 to move toward the workpiece. The workpiece is fixed through the cooperation between the pressure plate 37 and the side wall of the workpiece groove 8. At this time, the reset spring 36 is in a compressed state.

[0067] The turntable 7 continues to rotate to the cutter disc 614, and the outer surface of the workpiece is milled by the cutter disc 614. The milling debris falls from the discharge slot 3 to the inside of the receiving slot 2 due to gravity. After the workpiece is processed, as the turntable 7 rotates, the pressure rod 35 moves to the release portion 204, and the reset spring 36 relaxes. At this time, the elastic potential energy of the reset spring 36 drives the pressure rod 35 to move away from the workpiece, further separating the pressure plate 37 from the workpiece, thereby releasing the workpiece.

[0068] At this time, the next workpiece is slid into the pushing pipe 23 through the feed channel 11, driving the second push rod 27 to move synchronously with the first push rod 26, so that the second push rod 27 enters the workpiece slot 8 through the through hole 33, and further pushes the workpiece inside the workpiece slot 8. Then the processed workpiece falls from the discharge slot 3 to the receiving slot 2, and the first push rod 26 allows the next workpiece to enter the next workpiece slot 8 through the through hole 33. In this process, as the turntable 7 rotates, the unprocessed workpiece will approach the cutter disc 614, and under the action of the cutter disc 614, the workpiece is milled. The whole process is continuous, thereby improving the working efficiency of the equipment.

[0069] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0070] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A CNC thread milling machine, comprising a workbench and a three-axis CNC milling machine arranged at one end of the workbench, characterized in that: Also includes: A fixed seat, the fixed seat is arranged on the upper surface of the workbench, and a turntable is rotatably mounted on one end of the fixed seat close to the three-axis CNC milling machine, a driving member for driving the turntable to intermittently rotate is arranged on the fixed seat, a workpiece groove is radially opened on the side of the turntable facing the three-axis CNC milling machine, and a through hole adapted to the workpiece groove is opened in the turntable; A movable cavity, wherein the movable cavity is opened at the middle position of the turntable, and a guide block is movably installed inside the movable cavity, a pressure rod is movably installed on the inner wall of the movable cavity, one end of the pressure rod extends into the inside of the workpiece groove and is installed with a pressure plate, and the other end of the pressure rod abuts against the outer wall of the guide block and is provided with a ball, and a return spring is provided on the outer side of the pressure rod between the ball and the inner wall of the movable cavity; A pushing pipe, the pushing pipe is fixed in a fixed seat, a feeding channel penetrating the fixed seat is provided on one side of the pushing pipe, and a first push rod is axially slidably provided in the pushing pipe, a discharge pipe is fixed on one side of the pushing pipe, and a second push rod is axially slidably provided in the discharge pipe, the distance between the pushing pipe and the discharge pipe is the same as the distance between two adjacent through holes, and the vertical distance from the pushing pipe and the discharge pipe to the straight line where the axis of the turntable is located is the same as the vertical distance from the through hole to the straight line where the axis of the turntable is located; The guide block is a tapered structure as a whole, the end of the guide block close to the three-axis CNC milling machine is a small head end, and the other end of the guide block is a large head end, the maximum vertical distance from the outer edge of the large head end to the axis of the turntable is three times the maximum vertical distance from the outer edge of the small head end to the axis of the turntable, and the minimum vertical distance from the outer edge of the large head end to the axis of the turntable is the same as the minimum vertical distance from the outer edge of the small head end to the axis of the turntable; The guide block is located on one side of the arc surface to form a pressure-applying part, and the pressure-applying part squeezes the pressure rod to move the pressure rod away from the axis of the turntable. The guide block forms a release part on the side opposite to the arc surface, and the release part is used to release the elastic potential energy of the reset spring to make the pressure rod move toward the axis of the turntable.

2. A CNC thread milling machine according to claim 1, characterized in that: There are four workpiece slots in total, and the cross section of the workpiece slot is an isosceles triangle structure, and the bottom side of the workpiece slot is close to the axis of the turntable.

3. A CNC thread milling machine according to claim 2, characterized in that: A second servo motor is fixed inside the fixing seat, a reverse double-threaded rod is installed at the output end of the second servo motor, and a bidirectional thread groove is arranged on the outer side of the reverse double-threaded rod; A connecting seat is fixed to one end of the first push rod and the second push rod away from the three-axis CNC milling machine. A connecting hole is opened on the connecting seat. A sliding block adapted to the bidirectional thread groove is rotatably installed inside the connecting hole.

4. A CNC thread milling machine according to claim 3, characterized in that: The end of the pressing plate away from the three-axis CNC milling machine is an inclined surface structure, and elastic plates are installed on both sides of the pressing plate, and the elastic plates are against the side walls of the workpiece groove.

5. A CNC thread milling machine according to claim 4, characterized in that: A fixing plate for fixing the pushing pipe and the unloading pipe is symmetrically installed inside the fixing seat, a first cylinder is installed on the fixing plate, and a connecting plate is installed on the telescopic end of the first cylinder; A push rod slidably connected to a fixed plate is fixed to one end of the guide block away from the three-axis CNC milling machine, and the other end of the push rod is fixedly connected to the connecting plate.

6. A CNC thread milling machine according to any one of claims 1 to 5, characterized in that: The upper surface of the workbench is provided with a material discharge groove, and the bottom of the workbench is provided with a material receiving groove connected with the material discharge groove; A protection box is fixed to one end of the fixing seat away from the rotating disk, a box cover is hinged on one side of the protection box, and the protection box is connected to the other side of the box cover by snapping.

7. A CNC thread milling machine according to claim 6, characterized in that: The driving member includes a first servo motor fixed on the outside of a fixing seat and a first driven pulley fixed on the outside of a turntable, a first driving pulley is installed at the output end of the first servo motor, and a first synchronous belt is installed between the first driving pulley and the first driven pulley.

8. A CNC thread milling machine according to claim 7, characterized in that: The three-axis CNC milling machine comprises a base fixed to one end of the workbench, a support frame is slidably mounted above the base in a vertical direction, and a third cylinder for driving the support frame to move is mounted on the base, a bearing slide is slidably mounted on the upper surface of the support frame along its axial direction, a spindle box is fixed on the upper surface of the bearing slide, a second cylinder is rotatably mounted inside the spindle box, and a cutter disc is fixed on the telescopic end of the second cylinder; A fourth servo motor is fixed at one end of the support frame, a lead screw is installed at the output end of the fourth servo motor, a connecting nut seat is fixed at the bottom of the bearing slide plate, and the connecting nut seat is threadedly connected to the lead screw.

9. A CNC thread milling machine according to claim 8, characterized in that: A third servo motor is fixed inside the spindle box, a second driving pulley is installed at the output end of the third servo motor, a second driven pulley is fixedly sleeved on the second cylinder, and a second synchronous belt is installed between the second driven pulley and the second driving pulley.

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