Positioning mechanism for numerical control double-column vertical turning and milling composite lathe

Abstract

The invention discloses a positioning mechanism for a numerical control double-column vertical turning and milling composite lathe, and relates to the technical field of lathe positioning. The positioning mechanism for the numerical control double-column vertical turning and milling composite lathe comprises a mounting cover arranged at the top of a bottom plate, a fixing disc is fixedly inserted into the top of the mounting cover, multiple sets of positioning assemblies arranged in an array mode are arranged at the top of the fixing disc, and each set of positioning assembly comprises two symmetrically-arranged sliding grooves; and L-shaped sliding blocks are connected into the sliding grooves in a sliding mode, reset mechanisms are arranged between the sliding blocks and the sliding grooves, the side walls of the sliding blocks are connected with clamping jaws through telescopic mechanisms, the clamping jaws slide in the sliding grooves, and the sliding blocks are pushed to move through a pushing mechanism. According to the positioning mechanism for the numerical control double-column vertical turning and milling composite lathe, a plurality of groups of positioning assemblies are conveniently selected in sequence according to use requirements to center and position a workpiece, meanwhile, each clamping jaw is conveniently adjusted and controlled to keep the same clamping force, and the positioning efficiency and quality are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of lathe positioning, in particular to a positioning mechanism for a numerically controlled double-column vertical turning-milling compound lathe. Background Art

[0002] The CNC double-column vertical turning-milling compound lathe is a high-precision and high-efficiency machine tool equipment that integrates multiple processing functions such as turning and milling. During processing, a positioning mechanism is required to clamp and fix the workpiece.

[0003] However, when using the existing positioning mechanism of the CNC double-column vertical turning-milling compound lathe, it is not convenient to adjust the angle of the jaws according to the use requirements, so the jaws need to be disassembled and reinstalled. At the same time, it is not convenient to center the workpiece, and it is not convenient to adjust and control each jaw to maintain the same clamping force, which affects the efficiency and quality of positioning. Summary of the invention

[0004] The object of the present invention is to provide a positioning mechanism for a CNC double-column vertical turning-milling compound lathe to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning mechanism for a CNC double-column vertical turning-milling compound lathe, comprising a mounting cover arranged on the top of a base plate, a fixed disk being fixedly inserted on the top of the mounting cover, and a plurality of array-arranged positioning components are provided on the top of the fixed disk, each group of the positioning components comprising two symmetrically arranged slide grooves, and each slide groove is slidably connected with an L-shaped slider, and a reset mechanism is provided between the slider and the slide groove, the side wall of the slider is connected with a clamping claw through a telescopic mechanism, and the clamping claw slides in the slide groove, the movement of the slider is pushed by a pushing mechanism, and a hydraulic mechanism for pushing the clamping claw to move is provided on the top of the mounting cover.

[0006] Preferably, the telescopic mechanism includes a first rod fixedly connected to the side wall of the slider, and the side wall of the first rod is sleeved with a first sleeve, the other end of the first sleeve is fixed to the side wall of the clamp, and a guide mechanism is provided between the first rod and the first sleeve.

[0007] Preferably, the hydraulic mechanism includes a hollow annular cover fixedly connected to the side wall of the fixed plate, and a hose is arranged between each first sleeve and the annular cover, the top of the mounting cover is fixedly connected to an oil storage tank, and a sliding plate is slidably connected in the oil storage tank, the side wall of the sliding plate is connected to a movable plate through a telescopic assembly, and a movable module is arranged between the movable plate and the oil storage tank, a pressure sensor is fixedly inserted at the top of the oil storage tank, and a connecting pipe is fixedly connected between the oil storage tank and the annular cover.

[0008] Preferably, the telescopic assembly comprises two symmetrically arranged T-shaped guide rods fixedly connected to the side walls of the sliding plate, the movable plate is sleeved on the side walls of the T-shaped guide rods, and the side walls of each T-shaped guide rod are sleeved with a first spring.

[0009] Preferably, the reset mechanism includes a mounting block inserted in the slide slot, and the mounting block is detachably connected to the slide slot by bolts, the side wall of the mounting block is fixedly connected to two symmetrically arranged first guide rods, the side wall of the slider is fixedly connected to two symmetrically arranged second guide rods, and the side walls of the second guide rod and the first guide rod are sleeved with a second spring.

[0010] Preferably, the pushing mechanism includes a strip opening opened at the bottom of the slide groove, and a moving rod is inserted in the strip opening, a moving block is fixedly connected to the upper end of the moving rod, and the moving block is connected to the top of the slider through a lifting mechanism, a limiting mechanism for limiting the moving block is provided in the slide groove, and the bottom of the mounting cover is rotatably connected to a rotating disk through a first rotating shaft, a plurality of array-arranged inclined grooves are opened on the top of the rotating disk, and the rotation of the rotating disk is driven by a driving mechanism.

[0011] Preferably, the driving mechanism includes a gear ring fixedly sleeved on the side wall of the rotating disk, and the bottom of the mounting cover is fixedly connected to an L-shaped plate, the top of the L-shaped plate is fixedly connected to a motor, the output end of the motor is fixedly connected to a second rotating shaft, the side wall of the second rotating shaft is fixedly sleeved with a gear, and the gear is meshingly arranged with the gear ring.

[0012] Preferably, the lifting mechanism includes a second sleeve fixedly connected to the top of the slider, and a second rod is inserted in the second sleeve, the upper end of the second rod is fixed to the bottom of the moving block, and the bottom of the moving block is rotatably connected to a threaded rod, the side wall of the threaded rod is threadedly connected to a threaded tube, and the lower end of the threaded tube is fixed to the top of the slider, and the upper end of the threaded rod is fixedly connected to a rocker.

[0013] Preferably, the limiting mechanism includes a sliding groove opened on the side wall of the sliding groove, and a limiting plate is slidably connected in the sliding groove, the limiting plate is fixed to the side wall of the sliding block, and a limiting groove is opened at the bottom of the limiting plate, the side wall of the moving block is fixedly connected to a connecting frame, and the side wall of the connecting frame is fixedly connected to the limiting block.

[0014] Preferably, the guide mechanism comprises a guide groove provided on the side wall of the first sleeve, a guide pin is inserted into the guide groove, and the guide pin is fixed to the side wall of the first sleeve rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The positioning mechanism of this CNC double-column vertical milling compound lathe is provided with a pushing mechanism and a lifting mechanism, etc. When it is necessary to clamp and fix the workpiece, a group of positioning components are first clamped according to the positioning requirements. When making a selection, the rocker is rotated, and the rotation of the rocker drives the rotation of the threaded rod, thereby driving the moving rod to move downward and insert into the inclined groove through the moving block. At the same time, when the moving block moves downward, the limit block can be driven to move downward and withdraw from the limit groove through the connecting frame. At this time, the slider is no longer limited. Then, the motor is started, and the rotation of the motor drives the rotation of the second rotating shaft and the gear, and drives the rotating disk to rotate through the gear ring. When the rotating disk rotates, the moving rod can slide in the inclined groove and the strip opening, thereby pushing the two sliders of the same group to move closer to each other. At the same time, the second spring is stretched, and the two clamping claws are driven to move closer to each other through the telescopic mechanism. When the clamping claw contacts the side wall of the workpiece, the workpiece can be centered. Then, the moving block and the moving rod are moved upward through the lifting mechanism and the moving rod is withdrawn from the inclined groove. At the same time, when the moving block moves upward, the limit block can be driven by the connecting frame to move upward and insert into the limit groove to realize the limiting effect on the slider. Then, the driving mechanism drives the rotating disk to rotate and reset. Similarly, other positioning components are selected according to the use requirements to center the workpiece. After all positioning is completed, the moving plate is driven by the moving module to move in the direction close to the oil storage tank. At the same time, the sliding plate is driven by the telescopic component to slide into the oil storage tank, so that the hydraulic oil in the oil storage tank can be pushed for extrusion. At the same time, the first spring is compressed, so that the hydraulic oil can enter the annular cover through the connecting pipe, and then enter the first sleeve through the hose. Under the action of the hydraulic pressure, multiple clamps can be synchronously clamped and fixed to the workpiece, and as the first spring is gradually compressed, the pressure of the hydraulic oil gradually increases, so that the extrusion force of the clamp on the workpiece gradually increases. The pressure of the hydraulic oil is observed by the pressure sensor, so that the clamping force of the clamp on the workpiece can be adjusted and controlled, and the clamping force of all clamps can be guaranteed to be the same, thereby ensuring the efficiency and effect of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural schematic diagram of the installation cover in the present invention; Figure 3 for Figure 1 A schematic diagram of the enlarged structure at A in the middle; Figure 4 for Figure 2 A schematic diagram of the enlarged structure at B in the middle; Figure 5 for Figure 3 Schematic diagram of the enlarged structure at C in the middle; Figure 6 for Figure 3 Schematic diagram of the enlarged structure at D in the middle; Figure 7 for Figure 5 Schematic diagram of the enlarged structure at E in the middle; Figure 8 for Figure 5 Schematic diagram of the enlarged structure at F in the middle.

[0017] In the figure: 1, bottom plate; 2, pushing mechanism; 201, strip opening; 202, moving rod; 203, first rotating shaft; 204, rotating disk; 205, inclined slot; 3, hydraulic mechanism; 303, annular cover; 304, oil storage tank; 305, moving module; 306, moving plate; 307, sliding plate; 308, pressure sensor; 309, connecting pipe; 310, hose; 4, telescopic assembly; 401, T-shaped guide rod; 402, first spring; 5, driving mechanism; 501, gear ring; 502, L-shaped plate; 503, second rotating shaft; 504, gear; 505, motor; 6, reset mechanism; 601, mounting block; 602 , bolt; 603, first guide rod; 604, second guide rod; 605, second spring; 7, lifting mechanism; 701, moving block; 702, second sleeve; 703, second set of rods; 704, threaded tube; 705, threaded rod; 706, rocker; 8, limiting mechanism; 801, sliding groove; 802, limiting groove; 803, limiting plate; 804, connecting frame; 805, limiting block; 9, telescopic mechanism; 901, first set of rods; 902, first sleeve; 10, guiding mechanism; 1001, guiding groove; 1002, guiding pin; 11, mounting cover; 12, fixing plate; 13, sliding groove; 14, sliding block; 15, clamping claw. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 8The present invention provides a technical solution: a positioning mechanism for a CNC double-column vertical milling compound lathe, comprising a mounting cover 11 arranged on the top of a base plate 1, a fixed plate 12 is fixedly inserted on the top of the mounting cover 11, and a plurality of array-arranged positioning components are provided on the top of the fixed plate 12, each group of positioning components comprises two symmetrically arranged slide grooves 13, and each slide groove 13 is slidably connected with an L-shaped slider 14, and a reset mechanism 6 is provided between the slider 14 and the slide groove 13, a side wall of the slider 14 is connected with a clamping claw 15 through a telescopic mechanism 9, and the clamping claw 15 slides in the slide groove 13, the movement of the slider 14 is pushed by a pushing mechanism 2, and a hydraulic mechanism 3 for pushing the clamping claw 15 to move is provided on the top of the mounting cover 11, so that a plurality of positioning components can be selected in sequence according to the use requirements to center the workpiece, and at the same time, it is convenient to adjust and control each clamping claw 15 to maintain the same clamping force to ensure the efficiency and quality of positioning.

[0020] See also Figure 5 and Figure 8 The telescopic mechanism 9 includes a first rod 901 fixedly connected to the side wall of the slider 14, and the side wall of the first rod 901 is sleeved with a first sleeve 902, the other end of the first sleeve 902 is fixed to the side wall of the clamp 15, and a guide mechanism 10 is arranged between the first rod 901 and the first sleeve 902, and hydraulic oil is supplied to the first sleeve 902 through the hydraulic mechanism 3, and under the action of the hydraulic pressure, multiple clamps 15 can synchronously clamp and fix the workpiece.

[0021] See also Figure 5 , Figure 6 and Figure 8 The hydraulic mechanism 3 includes a hollow annular cover 303 fixedly connected to the side wall of the fixed plate 12, and a hose 310 is arranged between each first sleeve 902 and the annular cover 303. The top of the mounting cover 11 is fixedly connected to an oil storage tank 304, and a sliding plate 307 is slidably connected in the oil storage tank 304. The side wall of the sliding plate 307 is connected to a movable plate 306 through a telescopic component 4, and a movable module 305 is arranged between the movable plate 306 and the oil storage tank 304. A pressure sensor 308 is fixedly inserted at the top of the oil storage tank 304, and a connecting pipe 309 is fixedly connected between the oil storage tank 304 and the annular cover 303. The movable plate 306 is driven to move toward the direction close to the oil storage tank 304 through the movable module 305. At the same time, the sliding plate 307 is driven to slide into the oil storage tank 304 through the telescopic component 4, so that the hydraulic oil in the oil storage tank 304 can be pushed for extrusion.

[0022] See also Figure 6The telescopic assembly 4 includes two symmetrically arranged T-shaped guide rods 401 fixedly connected to the side wall of the sliding plate 307, the movable plate 306 is sleeved on the side wall of the T-shaped guide rod 401, and the side wall of each T-shaped guide rod 401 is sleeved with a first spring 402. As the hydraulic oil pressure gradually increases, the first spring 402 is gradually compressed.

[0023] See also Figure 7 The reset mechanism 6 includes a mounting block 601 inserted in the slide groove 13, and the mounting block 601 is detachably connected to the slide groove 13 by a bolt 602, and the side wall of the mounting block 601 is fixedly connected with two symmetrically arranged first guide rods 603, and the side wall of the slider 14 is fixedly connected with two symmetrically arranged second guide rods 604, and the side walls of the second guide rod 604 and the first guide rod 603 are sleeved with a second spring 605, which plays a resetting role on the movement of the slider 14.

[0024] See also Figure 3 and Figure 4 The pushing mechanism 2 includes a strip opening 201 opened at the bottom of the slide groove 13, and a moving rod 202 is inserted in the strip opening 201, and a moving block 701 is fixedly connected to the upper end of the moving rod 202, and the moving block 701 is connected to the top of the slider 14 through the lifting mechanism 7, and a limiting mechanism 8 for limiting the moving block 701 is provided in the slide groove 13, and a rotating disk 204 is rotatably connected to the bottom of the mounting cover 11 through a first rotating shaft 203, and a plurality of array-arranged inclined grooves are opened on the top of the rotating disk 204 205, and the rotation of the rotating disk 204 is driven by the driving mechanism 5, and the rotating disk 204 is driven to rotate by the driving mechanism 5. When the rotating disk 204 rotates, the moving rod 202 can slide in the inclined groove 205 and the strip opening 201, thereby pushing the two sliders 14 of the same group to move closer to each other. At the same time, the second spring 605 is stretched and drives the two clamping jaws 15 to move closer to each other through the telescopic mechanism 9. When the clamping jaws 15 contact the side wall of the workpiece, the workpiece can be centered.

[0025] See also Figure 4 The driving mechanism 5 includes a gear ring 501 fixedly sleeved on the side wall of the rotating disk 204, and an L-shaped plate 502 is fixedly connected to the bottom of the mounting cover 11, and a motor 505 is fixedly connected to the top of the L-shaped plate 502. The output end of the motor 505 is fixedly connected to the second rotating shaft 503, and a gear 504 is fixedly sleeved on the side wall of the second rotating shaft 503, and the gear 504 is meshed with the gear ring 501. When the motor 505 is started, the rotation of the motor 505 drives the rotation of the second rotating shaft 503 and the gear 504, and drives the rotating disk 204 to rotate through the gear ring 501.

[0026] See also Figure 5The lifting mechanism 7 includes a second sleeve 702 fixedly connected to the top of the slider 14, and a second rod 703 is inserted in the second sleeve 702, the upper end of the second rod 703 is fixed to the bottom of the moving block 701, and the bottom of the moving block 701 is rotatably connected to a threaded rod 705, the side wall of the threaded rod 705 is threadedly connected to a threaded tube 704, and the lower end of the threaded tube 704 is fixed to the top of the slider 14, the upper end of the threaded rod 705 is fixedly connected to a rocking wheel 706, and the rocking wheel 706 is rotated, and the rotation of the rocking wheel 706 drives the rotation of the threaded rod 705, thereby driving the moving rod 202 to be lifted and lowered through the moving block 701.

[0027] See also Figure 5 and Figure 7 The limiting mechanism 8 includes a sliding groove 801 opened on the side wall of the sliding groove 13, and a limiting plate 803 is slidably connected in the sliding groove 801, the limiting plate 803 is fixed to the side wall of the slider 14, and a limiting groove 802 is opened at the bottom of the limiting plate 803, the side wall of the moving block 701 is fixedly connected with a connecting frame 804, and the side wall of the connecting frame 804 is fixedly connected with a limiting block 805. When the moving block 701 moves upward, the limiting block 805 can be driven by the connecting frame 804 to move upward and be inserted into the limiting groove 802, thereby realizing the limiting effect on the slider 14.

[0028] See also Figure 8 The guide mechanism 10 includes a guide groove 1001 provided on the side wall of the first sleeve 902 , a guide pin 1002 is inserted into the guide groove 1001 , and the guide pin 1002 is fixed to the side wall of the first sleeve rod 901 , so as to guide the movement of the first sleeve 902 .

[0029] Working principle: When in use, when it is necessary to clamp and fix the workpiece, first clamp a group of positioning components according to the positioning requirements. When making a selection, turn the rocker 706. The rotation of the rocker 706 drives the rotation of the threaded rod 705, thereby driving the moving rod 202 to move downward through the moving block 701 and insert it into the inclined groove 205. At the same time, when the moving block 701 moves downward, it can drive the limit block 805 to move downward and withdraw from the limit groove 802 through the connecting frame 804. At this time, the slider 14 is no longer limited. Then , start the motor 505, the rotation of the motor 505 drives the second rotating shaft 503 and the gear 504 to rotate, and drives the rotating disk 204 to rotate through the gear ring 501. When the rotating disk 204 rotates, the moving rod 202 can slide in the inclined groove 205 and the strip opening 201, thereby pushing the two sliders 14 of the same group to move closer to each other. At the same time, the second spring 605 is stretched and drives the two clamping jaws 15 to move closer to each other through the telescopic mechanism 9. When the clamping jaws 15 contact the side wall of the workpiece, the workpiece can be centered. Next, the lifting mechanism 7 is used to move the moving block 701 and the moving rod 202 upward and the moving rod 202 is withdrawn from the inclined slot 205. At the same time, when the moving block 701 moves upward, the limit block 805 can be driven by the connecting frame 804 to move upward and insert into the limit slot 802, so as to limit the slider 14. Next, the driving mechanism 5 is used to drive the rotating disk 204 to rotate and reset. Similarly, other positioning components are selected according to the use requirements to center the workpiece. After all the positioning is completed, the moving plate 306 is driven by the moving module 305 to move towards the oil tank 304. At the same time, the sliding plate 307 is driven by the telescopic component 4 to slide into the oil tank 304, so that the hydraulic oil in the oil tank 304 can be pushed for extrusion. At the same time, the first spring 402 is compressed, so that the hydraulic oil can enter the annular cover 303 through the connecting pipe 309, and then enter the first sleeve 902 through the hose 310. Under the action of the hydraulic pressure, multiple clamps 15 can synchronously clamp and fix the workpiece, and as the first spring 402 is gradually compressed, the pressure of the hydraulic oil gradually increases, so that the squeezing force of the clamp 15 on the workpiece gradually increases. The pressure of the hydraulic oil is observed by the pressure sensor 308, so that the clamping force of the clamp 15 on the workpiece can be adjusted and controlled, and the clamping force of the clamp 15 can be ensured to be the same, thereby ensuring the efficiency and effect of clamping.

[0030] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0031] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A positioning mechanism for a CNC double-column vertical milling compound lathe, comprising a mounting cover (11) arranged on the top of a base plate (1), characterized in that: A fixing plate (12) is fixedly inserted on the top of the mounting cover (11), and a plurality of array-arranged positioning components are provided on the top of the fixing plate (12), each group of the positioning components comprising two symmetrically arranged slide grooves (13), and each slide groove (13) is slidably connected with an L-shaped slider (14), and a reset mechanism (6) is provided between the slider (14) and the slide groove (13), the side wall of the slider (14) is connected with a clamping claw (15) via a telescopic mechanism (9), and the clamping claw (15) slides in the slide groove (13), the movement of the slider (14) is driven by a driving mechanism (2), and a hydraulic mechanism (3) for driving the clamping claw (15) to move is provided on the top of the mounting cover (11).

2. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 1 is characterized in that: The telescopic mechanism (9) comprises a first rod (901) fixedly connected to the side wall of the slider (14), the side wall of the first rod (901) being sleeved with a first sleeve (902), the other end of the first sleeve (902) being fixed to the side wall of the clamping claw (15), and a guide mechanism (10) being provided between the first rod (901) and the first sleeve (902).

3. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 2 is characterized in that: The hydraulic mechanism (3) comprises a hollow annular cover (303) fixedly connected to the side wall of the fixed plate (12), and a hose (310) is provided between each first sleeve (902) and the annular cover (303). The top of the mounting cover (11) is fixedly connected to an oil storage tank (304), and a sliding plate (307) is slidably connected inside the oil storage tank (304). The side wall of the sliding plate (307) is connected to a movable plate (306) via a telescopic assembly (4), and a movable module (305) is provided between the movable plate (306) and the oil storage tank (304). A pressure sensor (308) is fixedly inserted at the top of the oil storage tank (304), and a connecting pipe (309) is fixedly connected between the oil storage tank (304) and the annular cover (303).

4. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 3 is characterized in that: The telescopic assembly (4) comprises two symmetrically arranged T-shaped guide rods (401) fixedly connected to the side wall of the sliding plate (307); the movable plate (306) is sleeved on the side wall of the T-shaped guide rod (401); and the side wall of each T-shaped guide rod (401) is sleeved with a first spring (402).

5. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 1 is characterized in that: The reset mechanism (6) comprises a mounting block (601) inserted into the slide groove (13), and the mounting block (601) is detachably connected to the slide groove (13) via a bolt (602); the side wall of the mounting block (601) is fixedly connected to two symmetrically arranged first guide rods (603); the side wall of the slider (14) is fixedly connected to two symmetrically arranged second guide rods (604); and the side walls of the second guide rods (604) and the first guide rods (603) are sleeved with second springs (605).

6. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 1, characterized in that: The pushing mechanism (2) comprises a strip-shaped opening (201) formed at the bottom of the slide groove (13), and a moving rod (202) is inserted into the strip-shaped opening (201); a moving block (701) is fixedly connected to the upper end of the moving rod (202), and the moving block (701) is connected to the top of the slider (14) via a lifting mechanism (7); a limiting mechanism (8) for limiting the moving block (701) is provided in the slide groove (13); and a rotating disk (204) is rotatably connected to the bottom of the mounting cover (11) via a first rotating shaft (203); a plurality of inclined grooves (205) arranged in an array are formed at the top of the rotating disk (204), and the rotation of the rotating disk (204) is driven by a driving mechanism (5).

7. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 6, characterized in that: The driving mechanism (5) comprises a gear ring (501) fixedly sleeved on the side wall of the rotating disk (204), and an L-shaped plate (502) is fixedly connected to the bottom of the mounting cover (11), a motor (505) is fixedly connected to the top of the L-shaped plate (502), a second rotating shaft (503) is fixedly connected to the output end of the motor (505), a gear (504) is fixedly sleeved on the side wall of the second rotating shaft (503), and the gear (504) is meshed with the gear ring (501).

8. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 6 is characterized in that: The lifting mechanism (7) comprises a second sleeve (702) fixedly connected to the top of the slider (14), and a second sleeve rod (703) is inserted into the second sleeve (702), the upper end of the second sleeve rod (703) is fixed to the bottom of the moving block (701), and the bottom of the moving block (701) is rotatably connected to a threaded rod (705), the side wall of the threaded rod (705) is threadedly connected to a threaded tube (704), and the lower end of the threaded tube (704) is fixed to the top of the slider (14), and the upper end of the threaded rod (705) is fixedly connected to a rocker (706).

9. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 6, characterized in that: The limiting mechanism (8) comprises a sliding groove (801) provided on the side wall of the sliding groove (13), and a limiting plate (803) is slidably connected in the sliding groove (801), the limiting plate (803) is fixed to the side wall of the sliding block (14), and a limiting groove (802) is provided at the bottom of the limiting plate (803), the side wall of the moving block (701) is fixedly connected to a connecting frame (804), and the side wall of the connecting frame (804) is fixedly connected to the limiting block (805).

10. The positioning mechanism for a CNC double-column vertical milling compound lathe according to claim 2, characterized in that: The guide mechanism (10) comprises a guide groove (1001) formed on the side wall of the first sleeve (902), a guide pin (1002) being inserted into the guide groove (1001), and the guide pin (1002) is fixed to the side wall of the first sleeve rod (901).

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