CN114603373A - Large-aperture turning device for numerical control lathe - Google Patents

Abstract

The invention relates to a large-aperture turning device for a numerical control lathe, which comprises a cutter bar, a cutter, a positioning mechanism and an adjusting mechanism, wherein the abutting mechanism comprises an abutting block, a first spring and a bolt, the positioning mechanism comprises a positioning assembly and a clamping assembly, the large-aperture turning device for the numerical control lathe realizes multilateral processing of an inner ring of a main body through the cooperation of the cutter bar and the cutter, so that the working efficiency is improved, the abutting assembly is used for realizing primary clamping of the cutter, the adjusting mechanism is used for realizing secondary limiting of the cutter, the cutter is prevented from moving during turning, the turning precision is improved, the driving unit is used for realizing the movement of the cutter, and the moving distance of the cutter is controlled through the cooperation of a first screw rod and scales, so that people can turn the main body conveniently, the working efficiency is improved, and the product quality is improved.

Description

Large-aperture turning device for numerical control lathe

Technical Field

The invention particularly relates to a large-aperture turning device for a numerical control lathe.

Background

A plurality of products or components with larger volume often have a plurality of large-diameter deep through holes to be processed, the diameter of the large-diameter deep hole is phi 50-270mm, the hole depth is more than 5 times of the diameter, and the efficient processing of the large-diameter deep holes is always a technical problem in the domestic machine tool industry.

The conventional machining method is characterized in that the conventional machining method is used for turning and forming through a single side for multiple times, the machining time is long, a cutter is seriously damaged, the working efficiency is reduced, and the conventional machining method is difficult to adapt to machining of large-batch large-diameter deep-hole workpieces.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the large-aperture turning device for the numerical control lathe is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a large-aperture turning device for a numerical control lathe comprises a cutter bar, a cutter, a positioning mechanism and an adjusting mechanism, wherein the cutter bar is horizontally arranged, a rectangular groove is formed in the cutter bar, the cutter is arranged in the rectangular groove, the adjusting mechanism is arranged on the cutter bar, an abutting mechanism is arranged at one end, far away from the positioning mechanism, of the cutter bar, the cutter is connected with the cutter bar through an abutting assembly, the abutting mechanism comprises an abutting block, a first spring and a bolt, an abutting groove is formed in one side, far away from the adjusting mechanism, of the rectangular groove, the abutting block is arranged in the abutting groove, the first spring is arranged at the bottom end inside the abutting groove, one end of the first spring is connected with the abutting block, the other end of the first spring is connected with the bottom end inside the abutting groove, one end, far away from the first spring, of the abutting block is connected with the cutter, a first threaded hole is formed in one end, close to the abutting block, of the cutter bar, the first threaded hole and the cutter bar are coaxially arranged, a through hole is formed in the abutting block and is coaxially arranged with the first threaded hole, the bolt penetrates through the first threaded hole and is in threaded connection with the first threaded hole, and the bolt penetrates through the through hole and abuts against the cutter;

the positioning mechanism comprises a positioning component and a clamping component, the positioning component is arranged between the cutter and the cutter bar, the positioning assembly comprises a first bearing seat, a first screw rod, a position moving ring, a support rod, a clamping plate and a driving unit, one end of the cutter bar, which is far away from the leaning block, is provided with a strip-shaped limiting groove, the first screw rod is horizontally arranged in the limiting groove, the two first bearing seats are respectively arranged at the two ends of the first screw rod, the first screw rod is connected with the inner wall of the limit groove through a first bearing seat, the walking ring is sleeved on the first screw rod, the walking ring is in transmission connection with the first screw rod, the clamping plate is arranged on one side of the cutter, the supporting rod is arranged between the clamping plate and the walking ring, the support rod is obliquely arranged, one end of the support rod is hinged with the clamping plate, and the other end of the support rod is hinged with the outer ring of the walking ring;

the driving unit is arranged on one side, far away from the support rod, of the cutter bar and comprises a rotating plate, a rotating rod, a second bearing block, a first bevel gear and a second bevel gear, the first bevel gear is arranged at one end, far away from the cutter, of the first screw rod, the second bevel gear is arranged below the first gear, the second bevel gear is meshed with the first bevel gear, the rotating plate is arranged below the cutter bar, the second bearing block is arranged on the cutter bar, the rotating rod is arranged between the rotating plate and the second bevel gear, one end of the rotating rod is connected with the rotating plate, the other end of the rotating rod extends into the limiting groove and is connected with the second bevel gear, and the rotating rod penetrates through the second bearing block;

the clamping assembly is arranged on the clamping plate, and the cutter is connected with the clamping plate through the clamping assembly.

Preferably, in order to realize the movement of the fixed plate and thus the clamping of the cutter, the clamping assembly comprises a fixed plate, a moving block, a second lead screw, a third bearing seat and a positioning unit, the fixed plate is horizontally arranged on the clamping plate, a strip-shaped moving groove is arranged at one end of the clamping plate close to the fixed plate, the cross section of the moving groove is in a T shape, the moving block is arranged in the moving groove, the moving plate is arranged below the moving block, the moving plate is slidably connected with the moving groove through the moving block, the moving plate is arranged opposite to the fixed plate, the third bearing seat is arranged at one side of the fixed plate close to the moving plate, the second lead screw is arranged between the third bearing seat and the moving plate, a second threaded hole matched with the second lead screw is arranged on the moving plate, and one end of the second lead screw is connected with the fixed plate through the third bearing seat, the other end of the second screw rod penetrates through a second threaded hole, the second screw rod is in threaded connection with the second threaded hole, one end of the cutter is abutted to the fixed plate, and the other end of the cutter is abutted to the movable plate.

Preferably, in order to realize the clamping effect on the cutter, the positioning unit comprises a positioning plate, a positioning rod, a pushing plate, a leaning rod, a second spring and a connecting plate, the positioning plate is arranged on one side, away from the fixed plate, of the movable plate, the connecting plate and the pushing plate are both arranged between the positioning plate and the movable plate, the connecting plate is arranged between the pushing plate and the positioning plate, the positioning rod is arranged between the pushing plate and the positioning plate, one end of the positioning rod is connected with the positioning plate, the other end of the positioning rod penetrates through the connecting plate to be connected with the pushing plate, the positioning rod is connected with the connecting plate in a sliding manner, the leaning rod is arranged between the movable plate and the pushing plate, the leaning rod is provided with a plurality of leaning rods, each leaning rod is arranged as it is, one end of the leaning rod is connected with the pushing plate, the other end of the leaning rod penetrates through the movable plate to lean against the cutter, the second spring is arranged between the pushing plate and the connecting plate, the second spring is sleeved on the positioning rod, one end of the second spring is connected with the connecting plate, and the other end of the second spring is connected with the pushing plate.

Preferably, in order to realize the positioning of the connecting plate and facilitate the rotation of the second lead screw, a connecting unit is arranged at one end of the second lead screw, which is far away from the third bearing seat, the connecting plate is connected with the second lead screw through the connecting unit, a cylindrical groove is arranged at one end of the second lead screw, which is far away from the third bearing seat, the connecting unit is positioned in the groove, the connecting unit comprises a connecting rod, a bead screw and a limiting ring, the connecting rod is arranged between the second lead screw and the connecting plate, one end of the connecting rod is connected with the connecting plate, the other end of the connecting rod extends into the groove, the connecting rod is in sliding connection with the groove, a clamping groove is arranged on the inner wall of the groove, the bead screw is arranged on the connecting rod, the bead screw is positioned in the clamping groove, an annular positioning groove is arranged on the inner wall of the groove, and the limiting ring is sleeved on the connecting rod, the limiting ring is located in the positioning groove, and the connecting rod is connected with the positioning groove in a sliding mode through the limiting ring.

Preferably, in order to facilitate the control of the moving distance of the walking ring, so as to calculate the moving distance of the cutter, the cutter bar is provided with scales.

The large-aperture turning device for the numerical control lathe has the advantages that the multi-edge processing of the inner ring of the main body is realized through the matching of the cutter bar and the cutter, the working efficiency is improved, the first-stage clamping of the cutter is realized through the abutting component, the second-stage limiting of the cutter is realized through the adjusting mechanism, the cutter is prevented from moving during turning, the turning precision is improved, the movement of the cutter can also be realized through the driving unit, and the moving distance of the cutter is controlled through the matching of the screw rod and the scales, so that people can turn the main body conveniently, the working efficiency is improved, and the product quality is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a large-aperture turning device for a numerically controlled lathe according to the present invention;

FIG. 2 is a schematic view of a connecting structure of a tool bar and an abutting mechanism of the large-aperture turning device for the numerically controlled lathe, provided by the invention;

FIG. 3 is a schematic view of a connection structure of a tool bar, a position moving ring, a first screw rod, a first bearing seat and a driving unit of the large-aperture turning device for the numerically controlled lathe according to the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of the connection structure of the clamping plate and the clamping component of the large-aperture turning device for the numerically controlled lathe according to the present invention;

FIG. 6 is an enlarged view of the portion B of FIG. 5;

in the figure: 1. the tool comprises a tool bar, 2, a cutter, 3, a support block, 4, a first spring, 5, a bolt, 6, a first bearing seat, 7, a first screw rod, 8, a position moving ring, 9, a support rod, 10, a clamping plate, 11, a rotating plate, 12, a rotating rod, 13, a second bearing seat, 14, a first bevel gear, 15, a second bevel gear, 16, a fixing plate, 17, a moving plate, 18, a moving block, 19, a second screw rod, 20, a third bearing seat, 21, a positioning plate, 22, a positioning rod, 23, a pushing plate, 24, a support rod, 25, a second spring, 26, a connecting plate, 27, a connecting rod, 28, a ball screw and 29, and a limiting ring.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-2, a large aperture turning device for a numerically controlled lathe includes a tool bar 1, a tool 2, a positioning mechanism and an adjusting mechanism, wherein the tool bar 1 is horizontally disposed, a rectangular groove is disposed on the tool bar 1, the tool 2 is disposed in the rectangular groove, the adjusting mechanism is disposed on the tool bar 1, the abutting mechanism is disposed at one end of the tool bar 1 away from the positioning mechanism, the tool 2 is connected with the tool bar 1 through an abutting component, the abutting mechanism includes an abutting block 3, a first spring 4 and a bolt 5, an abutting groove is disposed at one side of the rectangular groove away from the adjusting mechanism, the abutting block 3 is disposed in the abutting groove, the first spring 4 is disposed at a bottom end inside the abutting groove, one end of the first spring 4 is connected with the abutting block 3, the other end of the first spring 4 is connected with the bottom end inside the abutting groove, one end of the abutting block 3 away from the first spring 4 is connected with the tool 2, the cutter arbor 1 is close to the one end of leaning on piece 3 and is equipped with first screw hole, first screw hole and the coaxial setting of cutter arbor 1, be equipped with the through-hole on the leaning on piece 3, the through-hole sets up with first screw hole is coaxial, bolt 5 passes first screw hole, bolt 5 and first screw hole threaded connection, bolt 5 passes the through-hole and supports with cutter 2 and lean on.

Here when needing the main part to add man-hour, at first install cutter arbor 1 on the machine far away from the one end of bolt 5, then move cutter 2 to the rectangular channel in, here realize preliminary spacing to cutter 2 through the cooperation of propping against piece 3 and first spring 4 restoring force, prevent the removal of cutter 2, thereby be convenient for follow-up centre gripping to cutter 2, first spring 4 here is in compression state all the time, then can carry out the centre gripping to cutter 2 through bolt 5 at this moment, thereby increase the area of contact between cutter 2 and the cutter arbor 1, promote the centre gripping effect.

As shown in fig. 3-4, the positioning mechanism includes a positioning assembly and a clamping assembly, the positioning assembly is disposed between the tool 2 and the tool bar 1, the positioning assembly includes two first bearing seats 6, two first lead screws 7, a position-moving ring 8, a supporting rod 9, a clamping plate 10 and a driving unit, a strip-shaped limiting groove is disposed at one end of the tool bar 1 away from the abutting block 3, the first lead screws 7 are horizontally disposed in the limiting groove, the two first bearing seats 6 are respectively disposed at two ends of the first lead screws 7, the first lead screws 7 are connected with an inner wall of the limiting groove through the first bearing seats 6, the position-moving ring 8 is sleeved on the first lead screws 7, the position-moving ring 8 is in transmission connection with the first lead screws 7, the clamping plate 10 is disposed at one side of the tool 2, the supporting rod 9 is disposed between the clamping plate 10 and the position-moving ring 8, the supporting rod 9 is disposed in an inclined manner, one end of the supporting rod 9 is hinged with the clamping plate 10, and the other end of the supporting rod 9 is hinged with the outer ring of the walking ring 8;

the driving unit is arranged on one side of the cutter bar 1 far away from the support rod 9, the driving unit comprises a rotating plate 11, a rotating rod 12, a second bearing seat 13, a first bevel gear 14 and a second bevel gear 15, the first bevel gear 14 is arranged on one end of the first screw rod 7 far away from the cutter 2, the second bevel gear 15 is arranged below the first gear, the second bevel gear 15 is meshed with the first bevel gear 14, the rotating plate 11 is arranged below the cutter bar 1, the second bearing seat 13 is arranged on the cutter bar 1, the rotating rod 12 is arranged between the rotating plate 11 and the second bevel gear 15, one end of the rotating rod 12 is connected with the rotating plate 11, the other end of the rotating rod 12 extends into a limiting groove to be connected with the second bevel gear 15, and the rotating rod 12 penetrates through the second bearing seat 13;

the clamping assembly is arranged on the clamping plate 10, and the cutter 2 is connected with the clamping plate 10 through the clamping assembly.

When the cutter 2 moves to a preset position, the cutter 2 is limited through the clamping assembly, the fixing effect of the cutter 2 is improved, and the rigidity of the cutter 2 is increased, wherein two cutting edges are respectively arranged at two ends of the cutter 2, the inner hole of the main body is simultaneously machined through two ends of the cutter 2, wherein one end, close to the clamping assembly, of the cutter 2 firstly realizes the end face turning of the inner ring of the main body, then the other end, far away from the clamping assembly, of the cutter 2 secondly realizes the turning of the main body, for example, the initial inner hole diameter of the main body is 60, the inner hole needs to be machined to 260, 200 allowance needs to be machined, one end, close to the clamping assembly, of the cutter 2 firstly abuts against the end face of the inner ring of the main body, the inner hole of the main body is expanded to 100, then the other end of the cutter 2 abuts against the end face of the inner ring of the main body again, and the inner hole of the main body is expanded to 140, the two sides of the main body are machined simultaneously, so that the working efficiency is improved, the tool 2 is suitable for a white steel tool, and the rotating speed of the main body and the feeding rate of the tool 2 are controlled according to the main bodies made of different materials.

Here, by rotating the rotating plate 11, the rotating plate 11 drives the rotating rod to rotate, the rotating rod 12 drives the second bevel gear 15 to rotate, the second bevel gear 15 drives the first bevel gear 14 to rotate, namely, the first screw rod 7 is rotated, so that the walking ring 8 is moved, the walking ring 8 drives the supporting rod 9 to move, the supporting rod 9 drives the clamping assembly to move the cutter 2, the bolt 5 is in a loose state, at this time, the accurate movement of the cutter 2 can be realized, so that the control of the turning amount is realized conveniently, and the working efficiency is improved.

As shown in fig. 5, preferably, in order to realize the movement of the fixed plate 16 and thus the clamping of the tool 2, the clamping assembly includes a fixed plate 16, a moving plate 17, a moving block 18, a second lead screw 19, a third bearing seat 20 and a positioning unit, the fixed plate 16 is horizontally disposed on the clamping plate 10, one end of the clamping plate 10 close to the fixed plate 16 is provided with a strip-shaped moving groove, the cross section of the moving groove is T-shaped, the moving block 18 is disposed in the moving groove, the moving plate 17 is disposed below the moving block 18, the moving plate 17 is slidably connected with the moving groove through the moving block 18, the moving plate 17 is disposed opposite to the fixed plate 16, the third bearing seat 20 is disposed on one side of the fixed plate 16 close to the moving plate 17, the second lead screw 19 is disposed between the moving plate 20 and the moving plate 17, the moving plate 17 is provided with a second threaded hole matching with the second lead screw 19, one end of the second lead screw 19 is connected with the fixed plate 16 through the third bearing seat 20, the other end of the second lead screw 19 passes through the second threaded hole, the second lead screw 19 is in threaded connection with the second threaded hole, one end of the cutter 2 is abutted against the fixed plate 16, and the other end of the cutter 2 is abutted against the movable plate 17.

Preferably, in order to achieve the clamping effect on the tool 2, the positioning unit includes a positioning plate 21, a positioning rod 22, a pushing plate 23, a propping rod 24, a second spring 25 and a connecting plate 26, the positioning plate 21 is disposed on one side of the moving plate 17 away from the fixing plate 16, the connecting plate 26 and the pushing plate 23 are both disposed between the positioning plate 21 and the moving plate 17, the connecting plate 26 is disposed between the pushing plate 23 and the positioning plate 21, the positioning rod 22 is disposed between the pushing plate 23 and the positioning plate 21, one end of the positioning rod 22 is connected to the positioning plate 21, the other end of the positioning rod 22 passes through the connecting plate 26 to be connected to the pushing plate 23, the positioning rod 22 is slidably connected to the connecting plate 26, the propping rod 24 is disposed between the moving plate 17 and the pushing plate 23, the propping rods 24 are provided in plurality, each propping rod 24 is disposed as it is, one end of the propping rod 24 is connected to the pushing plate 23, the other end of the abutting rod 24 penetrates through the moving plate 17 to abut against the cutter 2, the second spring 25 is arranged between the pushing plate 23 and the connecting plate 26, the second spring 25 is sleeved on the positioning rod 22, one end of the second spring 25 is connected with the connecting plate 26, and the other end of the second spring 25 is connected with the pushing plate 23.

When the tool 2 needs to be clamped, only the second screw rod 19 needs to be rotated, the second screw rod 19 drives the moving plate 17 to move towards the direction of the fixed plate 16, clamping of the tool 2 is achieved through cooperation of the fixed plate 16 and the moving plate 17, the pushing plate 23 moves the abutting rod 24 through the second spring 25, the abutting rod 24 always abuts against the tool 2, and therefore the clamping effect of the tool 2 is improved.

As shown in fig. 6, preferably, in order to realize the positioning of the connecting plate 26 and facilitate the rotation of the second lead screw 19, a connecting unit is disposed at one end of the second lead screw 19 away from the third bearing seat 20, the connecting plate 26 is connected to the second lead screw 19 through the connecting unit, a cylindrical groove is disposed at one end of the second lead screw 19 away from the third bearing seat 20, the connecting unit is located in the groove, the connecting unit includes a connecting rod 27, a bead screw 28 and a limiting ring 29, the connecting rod 27 is disposed between the second lead screw 19 and the connecting plate 26, one end of the connecting rod 27 is connected to the connecting plate 26, the other end of the connecting rod 27 extends into the groove, the connecting rod 27 is slidably connected to the groove, a clamping groove is disposed on an inner wall of the groove, the bead screw 28 is disposed on the connecting rod 27, the bead screw 28 is disposed in the clamping groove, be equipped with annular constant head tank on the inner wall of recess, stop collar 29 cover is established on connecting rod 27, stop collar 29 is located the constant head tank, connecting rod 27 passes through stop collar 29 and constant head tank sliding connection.

Here, through the cooperation of the wave ball screw 28 and the limiting ring 29, the limitation of the connecting plate 26 is realized, the movement of the connecting plate 26 is prevented, meanwhile, the limitation of the second screw rod 19 is also realized, the rotation of the second screw rod 19 is prevented, here, for the convenience when the second screw rod 19 rotates, the positioning plate 21 can be pulled to drive the positioning rod 22 to move, the positioning rod 22 drives the pushing plate 23 to move, the pushing plate 23 drives the abutting rod 24 to move, so that the abutting rod 24 moves out of the moving plate 17, at this time, the rotation of the connecting plate 26 can be realized, because one end of the connecting plate 26 is limited by the wave ball screw 28 and the second screw rod 19, the connecting rod 27 in the second screw rod 19 can freely rotate, at this time, the connecting plate 26 rotates, the connecting plate 26 drives the connecting rod 27 to rotate, the connecting rod 27 drives the wave ball screw 28 to rotate, thereby realizing the rotation of the second screw rod 19, namely, the moving plate 17 is moved, when the moving plate 17 moves to the preset position, the positioning plate 21 is loosened, the return of the abutting rod 24 can be realized by the restoring force of the second spring 25, the limitation of the cutter 2 is realized by the abutting rod 24, and the angle of the connecting plate 26 can be adjusted by the bead screw 28, so that the abutting rod 24 is better abutted to the cutter 2.

Preferably, in order to control the moving distance of the carriage ring 8 and to calculate the moving distance of the tool 2, the tool bar 1 is provided with scales.

Compared with the prior art, this large aperture turning device that numerical control lathe used passes through cutter arbor 1 and cutter 2's cooperation, realize the multilateral processing to the main part inner circle, improve work efficiency, here realize the one-level centre gripping to cutter 2 through leaning on the subassembly, it is spacing to the second grade of cutter 2 to realize through adjustment mechanism, remove during the turning of cutter 2 prevents, improve the turning precision, and here can also realize the removal to cutter 2 through drive unit, cooperation through first lead screw 7 and scale, the distance that comes control cutter 2 to remove, thereby be convenient for people to the turning of main part, and the work efficiency is improved, and the product quality is improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (5)

1. A large-aperture turning device for a numerical control lathe comprises a cutter bar (1), a cutter (2), a positioning mechanism and an adjusting mechanism, wherein the cutter bar (1) is horizontally arranged, a rectangular groove is formed in the cutter bar (1), the cutter (2) is arranged in the rectangular groove, the adjusting mechanism is arranged on the cutter bar (1), a propping mechanism is arranged at one end, far away from the positioning mechanism, of the cutter bar (1), the cutter (2) is connected with the cutter bar (1) through a propping assembly, the large-aperture turning device is characterized in that the propping mechanism comprises a propping block (3), a first spring (4) and a bolt (5), a propping groove is formed in one side, far away from the adjusting mechanism, of the rectangular groove, the propping block (3) is arranged in the propping groove, the first spring (4) is arranged at the bottom end, far away from the inside of the propping groove, one end of the first spring (4) is connected with the propping block (3), the other end of the first spring (4) is connected with the bottom end inside the abutting groove, one end, far away from the first spring (4), of the abutting block (3) is connected with the cutter (2), one end, close to the abutting block (3), of the cutter bar (1) is provided with a first threaded hole, the first threaded hole is coaxially arranged with the cutter bar (1), a through hole is formed in the abutting block (3), the through hole is coaxially arranged with the first threaded hole, the bolt (5) penetrates through the first threaded hole, the bolt (5) is in threaded connection with the first threaded hole, and the bolt (5) penetrates through the through hole to abut against the cutter (2);

the positioning mechanism comprises a positioning component and a clamping component, the positioning component is arranged between a cutter (2) and a cutter bar (1), the positioning component comprises a first bearing seat (6), a first lead screw (7), a walking ring (8), a support rod (9), a clamping plate (10) and a driving unit, one end of the cutter bar (1) far away from the leaning block (3) is provided with a strip-shaped limiting groove, the first lead screw (7) is horizontally arranged in the limiting groove, the number of the first bearing seats (6) is two, the two first bearing seats (6) are respectively arranged at two ends of the first lead screw (7), the first lead screw (7) is connected with the inner wall of the limiting groove through the first shaft (6), the walking ring (8) is sleeved on the first lead screw (7), the walking ring (8) is in transmission connection with the first lead screw (7), the clamping plate (10) is arranged at one side of the cutter (2), the supporting rod (9) is arranged between the clamping plate (10) and the walking ring (8), the supporting rod (9) is obliquely arranged, one end of the supporting rod (9) is hinged with the clamping plate (10), and the other end of the supporting rod (9) is hinged with the outer ring of the walking ring (8);

the driving unit is arranged on one side, far away from the support rod (9), of the cutter bar (1), and comprises a rotating plate (11), a rotating rod (12), a second bearing seat (13), a first bevel gear (14) and a second bevel gear (15), wherein the first bevel gear (14) is arranged at one end, far away from the cutter (2), of a first screw rod (7), the second bevel gear (15) is arranged below the first gear, the second bevel gear (15) is meshed with the first bevel gear (14), the rotating plate (11) is arranged below the cutter bar (1), the second bearing seat (13) is arranged on the cutter bar (1), the rotating rod (12) is arranged between the rotating plate (11) and the second bevel gear (15), one end of the rotating rod (12) is connected with the rotating plate (11), and the other end of the rotating rod (12) extends into a limit groove to be connected with the second bevel gear (15), the rotating rod (12) penetrates through the second bearing seat (13);

the clamping assembly is arranged on the clamping plate (10), and the cutter (2) is connected with the clamping plate (10) through the clamping assembly.

2. The large-aperture turning device for the numerical control lathe according to claim 1, wherein the clamping assembly comprises a fixed plate (16), a moving plate (17), a moving block (18), a second screw rod (19), a third bearing seat (20) and a positioning unit, the fixed plate (16) is horizontally arranged on the clamping plate (10), one end, close to the fixed plate (16), of the clamping plate (10) is provided with a strip-shaped moving groove, the cross section of the moving groove is T-shaped, the moving block (18) is arranged in the moving groove, the moving plate (17) is arranged below the moving block (18), the moving plate (17) is slidably connected with the moving groove through the moving block (18), the moving plate (17) is arranged opposite to the fixed plate (16), the third bearing seat (20) is arranged on one side, close to the moving plate (17), of the second screw rod (19) is arranged between the third bearing seat (20) and the moving plate (17), be equipped with on movable plate (17) with second lead screw (19) assorted second screw hole, the one end of second lead screw (19) is passed through third bearing frame (20) and is connected with fixed plate (16), the second screw hole is passed to the other end of second lead screw (19), second lead screw (19) and second screw hole threaded connection, the one end and fixed plate (16) of cutter (2) support and lean on, the other end and movable plate (17) of cutter (2) support and lean on.

3. The large-aperture turning device for the numerical control lathe according to claim 2, wherein the positioning unit comprises a positioning plate (21), a positioning rod (22), a pushing plate (23), a leaning rod (24), a second spring (25) and a connecting plate (26), the positioning plate (21) is arranged on one side of the movable plate (17) far away from the fixed plate (16), the connecting plate (26) and the pushing plate (23) are both arranged between the positioning plate (21) and the movable plate (17), the connecting plate (26) is arranged between the pushing plate (23) and the positioning plate (21), the positioning rod (22) is arranged between the pushing plate (23) and the positioning plate (21), one end of the positioning rod (22) is connected with the positioning plate (21), the other end of the positioning rod (22) penetrates through the connecting plate (26) to be connected with the pushing plate (23), and the positioning rod (22) is connected with the connecting plate (26) in a sliding manner, support and lean on pole (24) to set up between movable plate (17) and slurcam (23), support and lean on pole (24) to have a plurality of, each supports and leans on pole (24) just so to set up, the one end that leans on pole (24) is connected with slurcam (23), the other end that leans on pole (24) passes movable plate (17) and supports with cutter (2) and lean on, second spring (25) set up between slurcam (23) and connecting plate (26), second spring (25) cover is established on locating lever (22), the one end and the connecting plate (26) of second spring (25) are connected, the other end and the slurcam (23) of second spring (25) are connected.

4. The large-aperture turning device for the numerical control lathe according to claim 3, wherein a connecting unit is arranged at one end of the second screw rod (19) far away from the third bearing seat (20), the connecting plate (26) is connected with the second screw rod (19) through the connecting unit, a cylindrical groove is arranged at one end of the second screw rod (19) far away from the third bearing seat (20), the connecting unit is located in the groove, the connecting unit comprises a connecting rod (27), a bead screw (28) and a limiting ring (29), the connecting rod (27) is arranged between the second screw rod (19) and the connecting plate (26), one end of the connecting rod (27) is connected with the connecting plate (26), the other end of the connecting rod (27) extends into the groove, the connecting rod (27) is in sliding connection with the groove, a clamping groove is arranged on the inner wall of the groove, and the bead screw (28) is arranged on the connecting rod (27), ripples pearl screw (28) are located the draw-in groove, be equipped with annular constant head tank on the inner wall of recess, spacing ring (29) cover is established on connecting rod (27), spacing ring (29) are located the constant head tank, connecting rod (27) are through spacing ring (29) and constant head tank sliding connection.

5. A large-aperture turning device for a numerical control lathe according to claim 3, wherein the tool bar (1) is provided with scales.

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