Multi-cutter-position metal cutting numerical control lathe

Abstract

The invention relates to a multi-tool-position metal cutting numerical control lathe which comprises a lathe body, a main shaft, an annular piece, a tool clamping mechanism and a feeding mechanism. The main shaft is rotatably mounted on the lathe body; the annular piece and the main shaft are coaxially arranged; the multiple tool clamping mechanisms are arranged in the circumferential direction of the annular part at intervals. Each tool clamping mechanism comprises a sliding base, a clamping base, a clamping plate and a limiting driving assembly. The sliding seat is mounted on the annular piece in a sliding manner along the radial direction of the annular piece; the clamping seat is rotatably mounted on the sliding seat; the multiple clamping plates are installed on the clamping base in a sliding mode, and the multiple clamping plates are arranged in a circular array mode with the axis of the clamping base as the circle center. The limiting driving assembly can drive the clamping plate to move so as to clamp the tool, and the limiting driving assembly can further limit rotation of the clamping base. Therefore, the cutters can be clamped, the angles of the cutters can be adjusted, and then the CNC system controls the feeding mechanism to drive the cutters to cut workpieces at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-station CNC lathes, and particularly relates to a multi-station metal cutting CNC lathe. Background Art

[0002] The spindle of the CNC lathe adopts manual control, mechatronic design, has a beautiful appearance, reasonable structure, wide application and convenient operation. This machine tool can realize automatic control and can perform turning operations such as the inner and outer circles, end faces, grooving, arbitrary conical surfaces, spherical surfaces and conical threads of various parts, and is suitable for mass production. The bed guide rail of the CNC lathe adopts ultra-audio frequency quenching process, has strong wear resistance, high precision, an advanced spindle system structure, stable rotation speed and high cutting performance.

[0003] For example, the patent with the publication number CN107855542A discloses a horizontal multi-station CNC lathe. The main body of the lathe has a rotatable spindle, and there is an adjacent processing chamber on one side. A control panel is provided directly above the spindle, and a display screen is fixedly installed on the front outer surface of the control panel. The bottom outer surface of the lathe main body is fixedly installed with a base. A slide rail is fixedly installed at the inner bottom end of the processing chamber, and a slider is movably installed on the upper outer surface of the slide rail. A tailstock is provided above the slider. The chip collection box of this horizontal multi-station CNC lathe can effectively clamp different types of tools by setting the sizes of the first tool position and the second tool position to be inconsistent, and then better perform finishing processing on the parts to be processed, realizing multi-station processing on them.

[0004] However, by arranging multiple tools on the turret in parallel, it is impossible to realize the simultaneous processing of multiple tools on the workpiece, and when feeding, the feed rates of multiple tools are the same, which greatly restricts the application range of multiple tools. For this reason, usually multiple tools are arranged in the axial direction of the spindle for synchronous processing. For example, the patent with the publication number CN110508832A discloses a multi-tool high-efficiency synchronous dynamic balancing turning machine tool and a processing method, belonging to the technical field of mechanical manufacturing. The tailstock is fixed at the tail of the bed, the electric spindle system is fixed at the head of the bed by screw one, the guide rail is fixed on both sides of the middle of the bed, the numerical control scale grating is fixed on one side of the middle of the bed, the worktable drive module is fixed in the center of the middle of the bed, and the worktable module is fixed on the worktable drive module. The advantages of the present invention are that three tools are installed and fixed at intervals of 120° each. When the three tools are processed simultaneously, the forces exerted by the tools on the workpiece to be processed cancel each other out, self-support and dynamic balance can be achieved, the force deformation of the workpiece to be processed is reduced, the processing accuracy is increased, the workload is reduced, time is saved, the efficiency is improved, and the machine tool has high versatility.

[0005] In some fine machining processes, it is often necessary to adjust the angle of the cutting tool so as to machine the corresponding structure on the workpiece. However, when installing the cutting tool on the above-mentioned numerical control machine tool, the cutting tool is fixed by the opposite clamping method, and the angle of the cutting tool clamped in this clamping direction is fixed, which is not applicable to some fine machining processes. Summary of the Invention

[0006] Aiming at the above problems existing in the prior art, the technical problem to be solved by the present invention is that when installing the cutting tool on the existing numerical control machine tool, the cutting tool is fixed by the opposite clamping method, and the angle of the cutting tool clamped in this clamping direction is fixed, which is not applicable to some fine machining processes.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: A multi-tool-position metal cutting numerical control lathe, comprising: Lathe body; Spindle, the spindle is rotatably installed on the lathe body; Ring part, arranged coaxially with the spindle; Tool clamping mechanism, a plurality of tool clamping mechanisms are arranged at intervals along the circumferential direction of the ring part, and the tool clamping mechanism includes: a sliding seat, a clamping seat, a clamping plate and a limit driving component; the sliding seat is slidably installed on the ring part along the radial direction of the ring part; the clamping seat is rotatably installed on the sliding seat; a plurality of the clamping plates are slidably installed on the clamping seat, and the plurality of clamping plates are circularly arranged around the axis of the clamping seat; the limit driving component can drive the clamping plate to move to clamp the cutting tool, and the limit driving component can also limit the rotation of the clamping seat; and Feeding mechanism, which can drive the sliding seat to feed in the axial direction and radial direction of the spindle.

[0008] Preferably, the limit driving component includes: a rotating shaft, a transmission unit and a connecting unit; the rotating shaft is rotatably inserted into the clamping seat; a plurality of slots are formed on the sliding seat; the plurality of slots are circularly arranged around the axis of the clamping seat, and the slots are located on the stroke of the rotating shaft; and when the rotating shaft is inserted into the slot, the connecting unit restricts the rotation of the rotating shaft; the rotation of the rotating shaft drives the clamping plate to move through the transmission unit.

[0009] Preferably, two rotating shafts and transmission units are provided, the two rotating shafts are coaxially arranged, and the connecting unit connects the two rotating shafts so that the two rotating shafts rotate synchronously and move towards each other.

[0010] Preferably, the connecting unit includes: a swivel ring, a connecting shaft, a connecting plate, a slider and a support piece; the swivel ring is rotatably mounted on the clamping seat, and the swivel ring is coaxially arranged with the rotating shaft; the two connecting plates are arranged crosswise, and the middle parts of the two connecting plates in the crosswise direction are both hinged to the swivel ring through the connecting shaft, and the connecting shaft is arranged along the radial direction of the swivel ring; two sliders are mounted on each rotating shaft through the support piece; the two sliders are arranged in one-to-one correspondence with the two connecting plates, and the sliders slide on the connecting plates along the length direction of the corresponding connecting plates; the sliders on each connecting plate are respectively arranged on both sides of the connecting shaft; a plurality of inclined grooves for plugging and matching with the side edges of the support piece are formed on the clamping seat; the plurality of inclined grooves are arranged in a circular array with the axis of the rotating shaft as the center; the inclined grooves are located on the stroke of the support piece.

[0011] Preferably, the connecting unit further includes an elastic member; the elastic member is arranged parallel to the rotating shaft, and both ends of the elastic member are respectively hinged to the ends of the two connecting plates.

[0012] Preferably, a hexagonal groove is formed on the rotating shaft away from the slot; the hexagonal groove is located on the side of the rotating shaft away from the slot.

[0013] Preferably, the transmission unit includes: a threaded rod, a first bevel gear and a second bevel gear; the first bevel gear and the second bevel gear are both rotatably mounted on the clamping seat, and the first bevel gear and the second bevel gear are meshed; the rotating shaft is arranged along the axial direction of the clamping seat to drive the first bevel gear to rotate; the threaded rod is arranged along the radial direction of the clamping seat, and the threaded rod is perpendicular to the rotating shaft, the threaded rod is threadedly connected to the clamping seat, and one end of the threaded rod is rotatably connected to the clamping plate; the threaded rod is coaxially arranged with the second bevel gear, and the threaded rod is slidably inserted into the second bevel gear in the axial direction.

[0014] Preferably, the annular member includes: a circular ring and side plates; side plates are respectively arranged at both ends of the circular ring; the circular ring is rotatably connected to the two side plates; the sliding seat is slidably mounted on the circular ring; the feeding mechanism drives the side plates to move in the axial direction of the main shaft.

[0015] Preferably, the feeding mechanism includes: an axial feeding mechanism and a radial feeding mechanism; the annular member is mounted on the lathe body through the axial feeding mechanism, the radial feeding mechanism and the tool clamping mechanism are arranged in one-to-one correspondence, and the radial feeding mechanism drives the sliding seat to slide.

[0016] Preferably, it further includes: a chuck and a tailstock; the chuck is mounted on the main shaft, the tailstock is slidably mounted on the lathe body along the length direction of the main shaft, and the tailstock is coaxially arranged with the main shaft.

[0017] Compared with the prior art, the present invention has at least the following advantages: 1. It can adjust the angle of the tool to adapt to different machining processes. In the present invention, the tool is placed between multiple clamping plates, and then the limit driving assembly is controlled to act. The limit driving assembly drives the clamping plates to move, so as to clamp the tool. Then, the clamping seat is rotated to adjust the angle of the tool through the clamping seat; after the angle adjustment of the tool is completed, the limit driving mechanism is used to limit the rotation of the clamping seat, and thus the installation and adjustment of the tool can be completed.

[0018] 2. It can cut the workpiece with multiple tools simultaneously. In the present invention, when machining the workpiece, the CNC system controls the rotation speed of the main shaft, and the main shaft drives the workpiece to rotate; the CNC system controls the feeding mechanism to act, and the feeding mechanism controls the tool clamping mechanism of the corresponding tool, so that the sliding seat slides, thereby realizing the feeding movement of the tool in the X-axis direction and driving multiple tools to cut the workpiece simultaneously; then, the annular part is controlled to move in the length direction of the main shaft, thereby driving multiple tools to reciprocate in the length direction of the main shaft and realizing the feeding action in the Z-axis direction, and further realizing the cutting of the workpiece.

[0019] 3. Through the setting of the limit driving assembly, it can not only drive the clamping plates to move to clamp the tool, but also limit the rotation of the clamping seat. In the present invention, the rotating shaft is rotated, and the rotating shaft drives the clamping plates to move through the transmission unit, so as to realize the clamping and fixing of the clamping plates; then, the angle of the tool is adjusted by rotating the clamping seat. After the adjustment is completed, the rotating shaft is slid to make the rotating shaft insert into the corresponding slot, and the rotating shaft drives the connecting unit to act, and the connecting unit limits the rotation of the rotating shaft, and thus the locking of the position of the clamping plates can be realized.

[0020] 4. Through the setting of the connecting unit, it can drive two rotating shafts to rotate synchronously and move towards each other, and only one of the rotating shafts needs to be controlled, which greatly simplifies the process of tool adjustment and clamping and improves the installation efficiency of multiple tools; and through the setting of the connecting unit, it can also limit the rotation of the rotating shaft and can effectively prevent the clamping plates from loosening. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts do not necessarily draw according to the actual ratio.

[0022] Figure 1 It is a three-dimensional view of a multi-tool-position metal cutting CNC lathe provided in this embodiment.

[0023] Figure 2 It is a three-dimensional view of the annular part and the tool clamping mechanism provided in this embodiment.

[0024] Figure 3 A cross-sectional view of the tool clamping mechanism provided in this embodiment.

[0025] Figure 4 A schematic structural diagram of the connection unit provided in this embodiment.

[0026] Reference numerals: 1, lathe body; 2, main shaft; 3, tailstock; 4, chuck; 5, axial feed mechanism; 6, annular member; 61, circular ring; 62, side plate; 7, tool clamping mechanism; 71, sliding seat; 711, slot; 72, clamping seat; 721, inclined slot; 722, receiving groove; 73, clamping plate; 74, limit driving assembly; 741, rotating shaft; 742, threaded rod; 743, first bevel gear; 744, second bevel gear; 745, hexagonal groove; 75, connection unit; 751, rotating ring; 752, connecting shaft; 753, connecting plate; 754, slider; 755, support piece; 756, elastic member. Detailed implementation manners

[0027] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the drawings and preferred embodiments to detail the specific implementation manners, structures, features, and effects according to the present invention as follows.

[0028] See Figures 1-4 , an embodiment provided by the present invention: a multi-tool-position metal cutting CNC lathe, including: a lathe body 1, a main shaft 2, an annular member 6, a tool clamping mechanism 7, and a feed mechanism; the main shaft 2 is rotatably installed on the lathe body 1; the annular member 6 is coaxially arranged with the main shaft 2; a plurality of tool clamping mechanisms 7 are arranged at intervals along the circumferential direction of the annular member 6, and the tool clamping mechanism 7 includes: a sliding seat 71, a clamping seat 72, a clamping plate 73, and a limit driving assembly 74; the sliding seat 71 is slidably installed on the annular member 6 along the radial direction of the annular member 6; the clamping seat 72 is rotatably installed on the sliding seat 71; a plurality of clamping plates 73 are slidably installed on the clamping seat 72, and the plurality of clamping plates 73 are circularly arranged around the axis of the clamping seat 72; a receiving groove 722 for receiving a plurality of clamping plates 73 is formed at one end of the clamping seat 72 close to the axis of the annular member 6; the limit driving assembly 74 can drive the clamping plate 73 to move to clamp the tool, and the limit driving assembly 74 can also limit the rotation of the clamping seat 72; the feed mechanism can drive the sliding seat 71 to feed in the axial direction and the radial direction of the main shaft 2.

[0029] During specific implementation, place the tool between multiple clamping plates 73, then control the limiting drive assembly 74 to act. The limiting drive assembly 74 drives the clamping plates 73 to move, thereby clamping the tool. Then rotate the clamping seat 72 to adjust the angle of the tool through the clamping seat 72; after the angle of the tool is adjusted, use the limiting drive mechanism to restrict the rotation of the clamping seat 72, and thus the installation and adjustment of the tool can be completed. When machining a workpiece, the CNC system controls the rotational speed of the main shaft 2 to rotate, and the main shaft 2 drives the workpiece to rotate; the CNC system controls the feed mechanism to act, and the feed mechanism controls the tool clamping mechanism 7 of the corresponding tool, causing the sliding seat 71 to slide, thereby realizing the feed movement of the tool in the X-axis direction and driving multiple tools to cut the workpiece simultaneously; then control the annular member 6 to move in the length direction of the main shaft 2, thereby driving multiple tools to reciprocate in the length direction of the main shaft 2, realizing the feed movement in the Z-axis direction, and further realizing the cutting of the workpiece.

[0030] See Figures 1-4 Refer to, in other embodiments, the limiting drive assembly 74 includes: a rotating shaft 741, a transmission unit, and a connecting unit 75; the rotating shaft 741 is rotatably inserted into the clamping seat 72; a plurality of slots 711 are formed on the sliding seat 71; the plurality of slots 711 are circularly arranged around the axis of the clamping seat 72, and the slots 711 are located on the stroke of the rotating shaft 741; and when the rotating shaft 741 is inserted into the slot 711, the connecting unit 75 restricts the rotation of the rotating shaft 741; the rotation of the rotating shaft 741 drives the clamping plate 73 to move through the transmission unit. During specific implementation, rotate the rotating shaft 741, and the rotating shaft 741 drives the clamping plate 73 to move through the transmission unit, thereby realizing the clamping and fixing of the clamping plate 73; then adjust the angle of the tool by rotating the clamping seat 72. After the adjustment is completed, slide and rotate to make the rotating shaft 741 insert into the corresponding slot 711, and the rotating shaft 741 drives the connecting unit 75 to act, and the connecting unit 75 restricts the rotation of the rotating shaft 741, and thus the locking of the position of the clamping plate 73 can be realized.

[0031] See Figures 1-4 Refer to, in other embodiments, two rotating shafts 741 and the transmission unit are provided, the two rotating shafts 741 are coaxially arranged, and the connecting unit 75 connects the two rotating shafts 741 so that the two rotating shafts 741 rotate synchronously and move towards each other. During specific implementation, by providing two transmission units, a thrust can be applied to both ends of a clamping plate 73 through the transmission unit. Compared with a single thrust, the tool can be clamped more stably.

[0032] See Figures 1-4, in other embodiments, the connecting unit 75 includes: a swivel 751, a connecting shaft 752, a connecting plate 753, a slider 754 and a support piece 755; the swivel 751 is rotatably mounted on the clamping seat 72, and the swivel 751 is coaxially arranged with the rotating shaft 741; the two connecting plates 753 are arranged crosswise, and the middle parts where the two connecting plates 753 cross are both hinged to the swivel 751 through the connecting shaft 752, and the connecting shaft 752 is arranged along the radial direction of the swivel 751; two sliders 754 are mounted on each rotating shaft 741 through the support piece 755; the two sliders 754 are arranged in one-to-one correspondence with the two connecting plates 753, and the slider 754 is slidably mounted on the connecting plate 753 along the length direction of the corresponding connecting plate 753; the sliders 754 on each connecting plate 753 are respectively arranged on both sides of the connecting shaft 752; a plurality of inclined slots 721 which are inserted and matched with the side edges of the support piece 755 are formed on the clamping seat 72; the plurality of inclined slots 721 are arranged in a circular array with the axis of the rotating shaft 741 as the center; the inclined slots 721 are located on the stroke of the support piece 755.

[0033] During specific implementation, rotate the rotating shaft 741, the rotating shaft 741 drives the support piece 755 fixedly connected thereto to rotate, the support piece 755 drives the slider 754 fixedly connected thereto to rotate, the slider 754 drives the corresponding connecting plate 753 to rotate, and the connecting plate 753 drives the slider 754, the support piece 755 and the rotating shaft 741 on the other side to rotate around the swivel 751 in sequence, so as to drive the threaded rod 742 to push the clamping plate 73 to clamp the tool; and when it is necessary to adjust the angle of the clamping seat 72, press the rotating shaft 741, the rotating shaft 741 pushes the slider 754 to slide through the support piece 755, the slider 754 drives the connecting plate 753 to rotate, and then drives the rotating shaft 741 on the other side to move inwards, so that the rotating shaft 741 can be pulled out of the slot 711, so that the limiting of the clamping seat 72 can be stopped, and then the angle of the clamping seat 72 can be adjusted; after the adjustment is completed, apply an outward force to the rotating shaft 741, and the rotating shaft 741 can be inserted into the nearest slot 711 again, so as to realize the re-limiting of the clamping seat 72; and after the clamping plate 73 clamps and fixes the tool, slide the rotating shaft 741 so that the support piece 755 moves into the nearest inclined slot 721, so as to limit the rotation of the rotating shaft 741 to prevent the clamping plate 73 from loosening. Therefore, through the setting of the connecting unit 75, the two rotating shafts 741 can be driven to rotate synchronously and move towards each other, and only one of the rotating shafts 741 needs to be controlled, which greatly simplifies the process of tool adjustment and clamping, and the connecting unit 75 can also limit the rotation of the rotating shaft 741, and can effectively prevent the clamping plate 73 from loosening.

[0034] See Figures 1-4, in other embodiments, the connecting unit 75 further includes an elastic member 756; the elastic member 756 is arranged parallel to the rotating shaft 741, and both ends of the elastic member 756 are hinged to the ends of the two connecting plates 753 respectively. Specifically, during implementation, when the rotating shaft 741 is pressed, the included angle between the two connecting plates 753 is changed, so that the two connecting plates 753 apply a pressure to the elastic member 756; when the pressing of the rotating shaft 741 stops, the elastic member 756 can push the two connecting plates 753 to rotate in the opposite direction, and then apply a thrust to the two rotating shafts 741, so that one of the rotating shafts 741 is inserted into the corresponding slot 711. Therefore, when sliding the rotating shaft 741, only the rotating shaft 741 needs to be pressed, which further simplifies the operation steps of sliding the rotating shaft 741. Specifically, the elastic member 756 includes a first housing, a second housing and a spring; both the first housing and the second housing are columnar and have an open end; the open end of the first housing is slidably inserted into the other housing to form a cavity for accommodating the spring; the first housing is hinged to one of the connecting plates 753, and the second housing is hinged to the other connecting plate 753, so that the spring can be effectively limited to prevent the spring from bending. Further, a hexagonal groove 745 is formed on the rotating shaft 741 away from the slot 711; the hexagonal groove 745 is located on the side of the rotating shaft 741 away from the slot 711. Through the arrangement of the hexagonal groove 745, it is possible to more conveniently rotate the rotating shaft 741 with a hexagonal wrench, and when using the hexagonal wrench, the rotating shaft 741 can be directly pressed and rotated without replacing other installation tools, reducing the processes of tool clamping and adjustment.

[0035] See Figures 1-4 , in other embodiments, the transmission unit includes: a threaded rod 742, a first bevel gear 743 and a second bevel gear 744; the first bevel gear 743 and the second bevel gear 744 are both rotatably installed on the clamping seat 72, and the first bevel gear 743 and the second bevel gear 744 are meshed; the rotating shaft 741 is arranged along the axis direction of the clamping seat 72 to drive the first bevel gear 743 to rotate; the threaded rod 742 is arranged along the radial direction of the clamping seat 72, and the threaded rod 742 is perpendicular to the rotating shaft 741, the threaded rod 742 is threadedly connected to the clamping seat 72, and one end of the threaded rod 742 is rotatably connected to the clamping plate 73; the threaded rod 742 is coaxially arranged with the second bevel gear 744, and the threaded rod 742 is slidably inserted into the second bevel gear 744 in the axial direction.

[0036] During specific implementation, a plurality of slots are formed in the length direction of the threaded rod 742, and the plurality of slots are evenly spaced in the circumferential direction of the threaded rod 742. A clamping block that is slidably engaged with the slots is fixed inside the second bevel gear 744. In this way, the second bevel gear 744 can slide relative to the threaded rod 742, and it does not affect the rotation of the threaded rod 742 either; rotate the rotating shaft 741, the rotating shaft 741 drives the first bevel gear 743 to rotate, the first bevel gear 743 drives the second bevel gear 744 to rotate, the second bevel gear 744 drives the threaded rod 742 to rotate, and under the action of the thread, the threaded rod 742 pushes the clamping plate 73 towards the tool to clamp the tool; and through the arrangement of the first bevel gear 743 and the second bevel gear 744, the control direction can be changed, so that the rotating shaft 741 and the tool are on the same side of the clamping seat 72, which is convenient for installing the tool.

[0037] See Figures 1-4 , in other embodiments, the annular member 6 includes: a circular ring 61 and side plates 62; side plates 62 are respectively arranged at both ends of the circular ring 61; the circular ring 61 is rotatably connected to the two side plates 62; the sliding seat 71 is slidably installed on the circular ring 61; the feeding mechanism drives the side plates 62 to move in the axial direction of the main shaft 2. During specific implementation, by rotating the circular ring 61, the tool clamping mechanism 7 on the circular ring 61 can be rotated, so that the tool on the circular ring 61 is close to the operator, and thus it is more convenient to disassemble, assemble and adjust the tool.

[0038] See Figures 1-4 , in other embodiments, the feeding mechanism includes: an axial feeding mechanism 5 and a radial feeding mechanism; the annular member 6 is installed on the lathe body 1 through the axial feeding mechanism 5, the radial feeding mechanisms and the tool clamping mechanisms 7 are arranged in one-to-one correspondence, and the radial feeding mechanism drives the sliding seat 71 to slide. During specific implementation, when the CNC system controls the axial feeding mechanism 5 to act, the tool can be driven to feed axially; when the CNC system controls the radial feeding mechanism to act, the tool can be driven to feed.

[0039] See Figures 1-4 , in yet another embodiment, it further includes: a chuck 4 and a tailstock 3; the chuck 4 is installed on the main shaft 2, the tailstock 3 is slidably installed on the lathe body 1 along the length direction of the main shaft 2, and the tailstock 3 is coaxially arranged with the main shaft 2. During specific implementation, one end of the workpiece is clamped on the main shaft 2 through the chuck 4, then the workpiece passes through the annular member 6, and the other end of the workpiece is abutted by the tailstock 3; in this way, the clamping and fixing of the workpiece can be realized.

[0040] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-position metal cutting CNC lathe, characterized in that: include: Lathe body; A main shaft, the main shaft being rotatably mounted on the lathe body; An annular member, coaxially arranged with the main shaft; A tool clamping mechanism, wherein a plurality of tool clamping mechanisms are arranged at intervals along the circumferential direction of the annular member, and the tool clamping mechanism comprises: a sliding seat, a clamping seat, a clamping plate and a limit drive assembly; The sliding seat is slidably mounted on the annular member along the radial direction of the annular member; the clamping seat is rotatably mounted on the sliding seat; a plurality of clamping plates are slidably mounted on the clamping seat, and the plurality of clamping plates are arranged in a circular array with the axis of the clamping seat as the center; the limit drive assembly can drive the clamping plate to move to clamp the tool, and the limit drive assembly can also limit the rotation of the clamping seat; and The feeding mechanism can drive the sliding seat to feed in the axial direction and radial direction of the main shaft.

2. A multi-position metal cutting CNC lathe according to claim 1, characterized in that: The limit drive assembly includes: a rotating shaft, a transmission unit and a connecting unit; the rotating shaft is rotatably inserted into the clamping seat; a plurality of slots are provided on the sliding seat; the plurality of slots are arranged in a circular array along the axis of the clamping seat, and the slots are located on the travel of the rotating shaft; and when the rotating shaft is inserted into the slots, the connecting unit limits the rotation of the rotating shaft; the rotation of the rotating shaft drives the clamping plate to move through the transmission unit.

3. A multi-position metal cutting CNC lathe according to claim 2, characterized in that: The rotating shafts and transmission units are provided with two, the two rotating shafts are coaxially arranged, and the connecting unit connects the two rotating shafts so that the two rotating shafts rotate synchronously and move in opposite directions.

4. A multi-position metal cutting CNC lathe according to claim 3, characterized in that: The connecting unit includes: a swivel, a connecting shaft, a connecting plate, a slider and a supporting plate; the swivel is rotatably mounted on the clamping seat, and the swivel is coaxially arranged with the rotating shaft; the two connecting plates are arranged crosswise with each other, and the middle parts of the intersection of the two connecting plates are hinged with the swivel through the connecting shaft, and the connecting shaft is arranged along the radial direction of the swivel; two sliders are installed on each of the rotating shafts through the supporting plate; the two sliders are arranged one by one with the two connecting plates, and the sliders are slidably mounted on the connecting plates along the length direction of the corresponding connecting plates; the sliders on each connecting plate are respectively arranged on both sides of the connecting shaft; the clamping seat is provided with a plurality of inclined grooves which are plugged in and matched with the side edges of the supporting plate; the plurality of inclined grooves are arranged in a circular array with the axis of the rotating shaft as the center; the inclined grooves are located on the stroke of the supporting plate.

5. A multi-position metal cutting CNC lathe according to claim 4, characterized in that: The connecting unit further comprises an elastic member; the elastic member and the rotating shaft are arranged parallel to each other, and two ends of the elastic member are respectively hinged to the ends of the two connecting plates.

6. A multi-position metal cutting CNC lathe according to claim 5, characterized in that: A hexagonal groove is provided on the rotating shaft away from the slot; the hexagonal groove is located on a side of the rotating shaft away from the slot.

7. The multi-position metal cutting CNC lathe according to claim 2, characterized in that: The transmission unit includes: a threaded rod, a first bevel gear and a second bevel gear; the first bevel gear and the second bevel gear are both rotatably mounted on the clamping seat, and the first bevel gear and the second bevel gear are meshed; the rotating shaft is arranged along the axial direction of the clamping seat to drive the first bevel gear to rotate; the threaded rod is arranged along the radial direction of the clamping seat, and the threaded rod and the rotating shaft are perpendicular to each other, the threaded rod is threadedly connected to the clamping seat, and one end of the threaded rod is rotatably connected to the clamping plate; the threaded rod is coaxially arranged with the second bevel gear, and the threaded rod is slidably plugged into the second bevel gear in the axial direction.

8. The multi-position metal cutting CNC lathe according to claim 1, characterized in that: The annular member comprises: a circular ring and a side plate; the two ends of the circular ring are respectively provided with a side plate; the circular ring is rotatably connected to the two side plates; the sliding seat is slidably mounted on the circular ring; the feeding mechanism drives the side plate to move in the axial direction of the main shaft.

9. The multi-position metal cutting CNC lathe according to claim 1, characterized in that: The feeding mechanism comprises: an axial feeding mechanism and a radial feeding mechanism; the annular member is mounted on the lathe body via the axial feeding mechanism, the radial feeding mechanism and the tool clamping mechanism are arranged in a one-to-one correspondence, and the radial feeding mechanism drives the sliding seat to slide.

10. The multi-position metal cutting CNC lathe according to claim 1, characterized in that: Also includes: A chuck and a tailstock; the chuck is mounted on the spindle, the tailstock is slidably mounted on the lathe body along the length direction of the spindle, and the tailstock is coaxially arranged with the spindle.

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