阅读说明：本技术 一种实操用防撞刀车床 (Anti-collision cutter lathe for practical operation ) 是由 郑雨梦 于 2021-08-23 设计创作，主要内容包括：本发明涉及机械加工技术领域,公开了一种实操用防撞刀车床,包括机床床身,所述机床床身包括交流电机、防撞刀床头箱、液压三爪卡盘,所述交流电机的上侧设有动力传递系统,所述机床床身内水平设有第二丝杠,所述机床床身内水平设有滑板,所述滑板位于所述第二丝杠的上方,所述第二丝杠上左右滑动设有溜板箱。本装置通过连续屑剪切机构与溜板箱的同步功能,将切削时产生的连续屑通过持续转动的可塑杆将其拉入主螺旋切刃与副螺旋切刃之间,通过副螺旋切刃与主螺旋切刃的啮合将连续屑切断避免了连续屑在液压三爪卡盘的转动下缠绕成团并最终导致液压三爪卡盘与刀具发生碰撞。(The invention relates to the technical field of machining, and discloses an anti-collision knife lathe for practical operation, which comprises a lathe bed, wherein the lathe bed comprises an alternating current motor, an anti-collision knife headstock and a hydraulic three-jaw chuck, a power transmission system is arranged on the upper side of the alternating current motor, a second lead screw is horizontally arranged in the lathe bed, a sliding plate is horizontally arranged in the lathe bed, the sliding plate is positioned above the second lead screw, and a slide carriage box is arranged on the second lead screw in a left-right sliding manner. This device is through the synchronizing function of continuous bits shearing mechanism and carriage apron case, and the continuous bits that produce when will cutting draws it into between main spiral cutting edge and the vice spiral cutting edge through lasting pivoted plastic pole, cuts off continuous bits through the meshing of vice spiral cutting edge and main spiral cutting edge and has avoided continuous bits to twine into a group and finally lead to hydraulic pressure three-jaw chuck and cutter to bump under the rotation of hydraulic pressure three-jaw chuck.)

1. The utility model provides a crashproof sword lathe for real operation, includes lathe bed (47), lathe bed (47) are including AC motor (39), crashproof sword headstock (44), hydraulic pressure three-jaw chuck (20), the upside of AC motor (39) is equipped with power transmission system (15), level is equipped with second lead screw (23) in lathe bed (47), level is equipped with slide (43) in lathe bed (47), slide (43) are located the top of second lead screw (23), second lead screw (23) go up the horizontal slip and are equipped with carriage apron case (18), the upper end of carriage apron case (18) is equipped with trades knife rest (46), its characterized in that: the continuous chip shearing system (12) comprises a continuous chip shearing and feeding mechanism (11) and a continuous chip shearing mechanism (10), and the continuous chip shearing mechanism (10) is installed on the continuous chip shearing and feeding mechanism (11) in a sliding mode from side to side.

2. The utility model relates to a practical crashproof cutter lathe of claim 1, characterized in that: continuous bits are cuted feed mechanism (11) including the level set up in lathe bed (47) and be located first lead screw (22) of the top of hydraulic pressure three-jaw chuck (20), the top parallel of first lead screw (22) is equipped with polished rod (21), the coaxial rotation of right-hand member of second lead screw (23) is equipped with first servo motor (45), second lead screw (23) with be equipped with fourth hold-in range (17) synchronous rotation between first lead screw (22) and connect.

3. The utility model relates to a practical crashproof cutter lathe of claim 1, characterized in that: the continuous chip shearing mechanism (10) comprises a fixed shell (48), a main spiral cutting edge (42) is horizontally arranged in the fixed shell (48) in a rotating mode, an auxiliary spiral cutting edge (41) is horizontally arranged in the fixed shell (48) in a rotating mode, the auxiliary spiral cutting edge (41) is meshed with the main spiral cutting edge (42), the main spiral cutting edge (42) and the right end of a main shaft of the auxiliary spiral cutting edge (41) are respectively and coaxially arranged in a rotating mode and are provided with a driving bevel gear (34) and a driven bevel gear (35), the driving bevel gear (34) is meshed with the driven bevel gear (35), a first lead screw nut (36) is arranged on the upper end face of the fixed shell (48), the first lead screw nut (36) is arranged on the first lead screw (22) in a left-right moving mode, and a transmission shaft is arranged at the outer connection of the left end of the main shaft of the main spiral cutting edge (42) in a rotating mode.

4. A practical crashproof cutter lathe according to claim 3, wherein: the left end coaxial rotation of main spiral cutting edge (42) is equipped with first screw nut (36), the upper end of fixed casing (48) is equipped with winder (56), winder (56) are located including rotating driven bevel gear (37) in fixed casing (48), driven bevel gear (37) with first screw nut (36) meshing, the centre of driven bevel gear (37) is equipped with plastic pole (38) of outside extension.

5. A practical crashproof cutter lathe according to claim 3, wherein: the upper end face of the fixed shell (48) is provided with a polish rod sliding block (49) which extends upwards and is provided with a through hole, and the polish rod sliding block (49) is sleeved on the polish rod (21) in a left-right sliding mode.

6. The utility model relates to a practical crashproof cutter lathe of claim 1, characterized in that: power transmission system (15) include transmission system (13) and integral type clutch (14), transmission system (13) include a plurality of drive belts, integral type clutch (14) set up in between two drive belts of transmission system (13), the right-hand member of integral type clutch (14) with the left end of carriage apron case (18) offsets, alternating current motor (39) with pass through between hydraulic pressure three-jaw chuck (20) transmission system (13) synchronous rotation connects.

7. The utility model discloses an anticollision sword lathe of claim 6, characterized in that: integral type clutch (14) include synchronizing gear (27), the right-hand member of synchronizing gear (27) is equipped with hydraulic telescoping rod (24) that extend right, the right-hand member of hydraulic telescoping rod (24) is equipped with rubber crashproof gasket (25), the right-hand member face of rubber crashproof gasket (25) with the left end face of carriage apron case (18) offsets.

8. The utility model relates to a practical crashproof cutter lathe of claim 1, characterized in that: an oil tank (16) is fixedly arranged on the left end face of the machine tool body (47), a flow pump (40) is communicated with the lower end of the oil tank (16), and a hydraulic pipe (26) communicated with the inner cavity of the hydraulic telescopic rod (24) is arranged at the other end of the flow pump (40).

9. An actual crashworthy cutter lathe according to claim 6 or 7, wherein: the left end of the integrated clutch (14) extends leftwards to be provided with a tensioning spring (28), and the left end of the tensioning spring (28) is sleeved with a double anti-loosening nut (29).

10. The utility model discloses an anticollision sword lathe of claim 6, characterized in that: drive system (13) including the synchro-connected integral type clutch (14) with first hold-in range (30), the synchro-connection of alternating current motor (39) integral type clutch (14) with second hold-in range (31) of hydraulic pressure three-jaw chuck (20), be located in lathe bed (47) the fixed first nut seat (55) that is equipped with in top of hydraulic pressure three-jaw chuck (20), the main shaft of hydraulic pressure three-jaw chuck (20) with be equipped with third hold-in range (32) synchronous revolution between first nut seat (55) and connect, the main shaft of first nut seat (55) internal rotation extends right and is equipped with flexible transmission shaft (33), flexible transmission shaft (33) with main spiral cutting edge (42) coaxial rotation is connected.

Technical Field

The invention relates to the technical field of machining, in particular to an anti-collision cutter lathe for practical operation.

Background

The numerically controlled lathe is one of the widely used numerically controlled machines at present. The numerical control machine tool is mainly used for cutting and processing inner and outer cylindrical surfaces of shaft parts or disc parts, inner and outer conical surfaces with any taper angle, complex rotary inner and outer curved surfaces, cylinders, conical threads and the like, and can perform grooving, drilling, reaming, boring and the like, the numerical control machine tool automatically processes parts to be processed according to a processing program which is programmed in advance, in the use or teaching or metalworker practice of the existing numerical control lathe, the phenomenon that a tool rest is collided with a three-jaw chuck rotating at a high speed due to the wrong input of parameters or programs often occurs, the rotating speed of a main shaft adopted by the numerical control machine tool often reaches 3000r/min, the three-jaw chuck is collided with the tool rest at the high rotating speed, the chuck can be broken, a cutter body and an alloy blade can splash, even a glass on a protective door can be punctured to cause serious safety accidents, in the teaching or metalworker practice, a student often forgets to close the protective door, in addition, continuous cutting chips with good strength and toughness are generated due to the fact that the feeding amount of the tool rest is reduced due to increase of the tool carrying amount, the cutting chips are wound on the spindle and form a cluster under the rotation of the three-jaw chuck, finally the cutting chips collide with the tool changing frame, and meanwhile, the roughness of the surface of a workpiece is seriously damaged, even the size is damaged, so that the lathe for practice teaching, which can solve the problems, is needed.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the problems, the utility model provides a practical crashproof cutter lathe which solves the problems.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the utility model provides a crashproof sword lathe for real operation, includes the lathe bed, the lathe bed includes AC motor, crashproof sword headstock, hydraulic pressure three-jaw chuck, AC motor's upside is equipped with power transmission system, the level is equipped with the second lead screw in the lathe bed, the level is equipped with the slide in the lathe bed, the slide is located the top of second lead screw, the horizontal slip is equipped with the carriage box on the second lead screw, the upper end of carriage box is equipped with trades the knife rest, still includes continuous bits shearing system, continuous bits shearing system includes continuous bits shearing feed mechanism and continuous bits shearing mechanism, continuous bits shearing mechanism horizontal slip dress in on the continuous bits shearing feed mechanism.

In one embodiment, the continuous scrap shearing and feeding mechanism comprises a first lead screw horizontally arranged in the machine tool body and located above the hydraulic three-jaw chuck, a polished rod is arranged above the first lead screw in parallel, a first servo motor is coaxially and rotatably arranged at the right end of the second lead screw, and a fourth synchronous belt is arranged between the second lead screw and the first lead screw for synchronous rotation connection.

In one embodiment, the continuous chip shearing mechanism comprises a fixed shell, a main spiral cutting edge is arranged in the fixed shell in a horizontally rotating mode, an auxiliary spiral cutting edge is arranged in the fixed shell in a horizontally rotating mode, the auxiliary spiral cutting edge is meshed with the main spiral cutting edge, the main spiral cutting edge and the right end of a main shaft of the auxiliary spiral cutting edge are respectively and coaxially arranged in a rotating mode and are provided with a driving bevel gear and a driven bevel gear, the driving bevel gear is meshed with the driven bevel gear, a first screw nut is arranged on the upper end face of the fixed shell, the first screw nut is installed on a first screw rod in a left-right moving mode, and a transmission shaft is arranged at the left end of the main shaft of the main spiral cutting edge in an external connection mode.

In one embodiment, the left end of the main spiral cutting edge is coaxially and rotatably provided with a first lead screw nut, the upper end of the fixed shell is provided with a winder, the winder comprises a driven bevel gear rotatably arranged in the fixed shell, the driven bevel gear is meshed with the first lead screw nut, and a plastic rod extending outwards is arranged in the middle of the driven bevel gear.

In one embodiment, the upper end face of the fixed shell is provided with a polish rod sliding block which extends upwards and is provided with a through hole, and the polish rod sliding block is sleeved on the polish rod in a left-right sliding mode.

In one embodiment, the power transmission system comprises a transmission system and an integrated clutch, the transmission system comprises a plurality of transmission belts, the integrated clutch is arranged between the two transmission belts of the transmission system, the right end of the integrated clutch abuts against the left end of the slide carriage box, and the alternating current motor is connected with the hydraulic three-jaw chuck in a synchronous rotating mode through the transmission system.

In one embodiment, the integrated clutch comprises a synchronizing gear, a hydraulic telescopic rod extending rightwards is arranged at the right end of the synchronizing gear, a rubber anti-collision gasket is arranged at the right end of the hydraulic telescopic rod, and the right end face of the rubber anti-collision gasket is abutted to the left end face of the slide carriage box.

In one embodiment, an oil tank is fixedly arranged on the left end face of the machine tool body, the lower end of the oil tank is communicated with a flow pump, and a hydraulic pipe communicated with the inner cavity of the hydraulic telescopic rod is arranged at the other end of the flow pump.

In one embodiment, a tension spring extends leftwards from the left end of the integrated clutch, and a double anti-loosening nut is sleeved on the left end of the tension spring.

In one embodiment, the transmission system comprises a first synchronous belt for synchronously connecting the integrated clutch with the alternating current motor and a second synchronous belt for synchronously connecting the integrated clutch with the hydraulic three-jaw chuck, a first nut seat is fixedly arranged above the hydraulic three-jaw chuck in the machine tool body, a third synchronous belt is arranged between a main shaft of the hydraulic three-jaw chuck and the first nut seat for synchronous rotation connection, a soft transmission shaft is arranged in the first nut seat in a manner of rotating the main shaft rightwards, and the soft transmission shaft is coaxially and rotatably connected with the main spiral cutting edge.

The invention has the advantages and positive effects that: continuous scraps generated during cutting are pulled into a space between the main spiral cutting edge and the auxiliary spiral cutting edge through the plastic rod which continuously rotates by virtue of the synchronous function of the continuous scrap shearing mechanism and the slide carriage box, and are cut off by virtue of the meshing of the auxiliary spiral cutting edge and the main spiral cutting edge, so that the continuous scraps are prevented from being wound into a cluster under the rotation of the hydraulic three-jaw chuck and finally the hydraulic three-jaw chuck collides with a cutter;

the transmission system is connected through the synchronous gear capable of moving left and right, a hydraulic telescopic rod is arranged at the right end of the synchronous gear, when the slide carriage is out of range due to program errors in the working process, the slide carriage firstly pushes the hydraulic telescopic rod together with the synchronous gear to the right and overcomes the elastic force of a tension spring to enable a second synchronous belt to lose torque, so that the hydraulic three-jaw chuck stops rotating, the slide carriage cannot move towards the direction of the hydraulic three-jaw chuck continuously after the tension spring is compressed to the limit, collision between a cutter or a cutter changing frame and the hydraulic three-jaw chuck is avoided, and meanwhile, the rotation of the hydraulic three-jaw chuck is stopped, so that the hydraulic three-jaw chuck is simple, effective, safe and reliable.

Drawings

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

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged schematic structural view of the power transmission system of FIG. 1;

FIG. 3 is an enlarged schematic view of the second timing belt and the first timing belt of FIG. 2 with the second timing belt and the first timing belt removed;

FIG. 4 is an enlarged schematic view of the continuous chip shearing mechanism of FIG. 1;

fig. 5 is a schematic view of the left structure of fig. 4.

The scores in the figures are as follows: 10. a continuous chip shearing mechanism; 11. a continuous chip shearing and feeding mechanism; 12. a continuous chip shearing system; 13. a transmission system; 14. an integral clutch; 15. a power transmission system; 16. an oil tank; 17. a fourth synchronous belt; 18. a slide carriage box; 20. a hydraulic three-jaw chuck; 21. a polish rod; 22. a first lead screw; 23. a second lead screw; 24. a hydraulic telescopic rod; 25. a rubber anti-collision gasket; 26. a hydraulic tube; 27. a synchronizing gear; 28. tensioning the spring; 29. double nuts for preventing looseness; 30. a first synchronization belt; 31. a second synchronous belt; 32. a third synchronous belt; 33. a flexible drive shaft; 34. a drive bevel gear; 35. a driven helical gear; 36. a first lead screw nut; 37. a driven bevel gear; 38. a malleable rod; 39. an alternating current motor; 40. a flow pump; 41. a secondary helical cutting edge; 42. a primary helical cutting edge; 43. a slide plate; 44. a tool head collision prevention box; 45. a first servo motor; 46. changing a tool rest; 47. a machine tool body; 48. a stationary housing; 49. a polish rod slider; 55. a first nut seat; 56. a winder.

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.

The embodiments of the invention will be described in further detail below with reference to the accompanying drawings:

as shown in fig. 1 to 5, the utility model relates to a crashproof cutter lathe for practical operation, which comprises a lathe bed 47, wherein the lathe bed 47 comprises an alternating current motor 39, a crashproof cutter headstock 44 and a hydraulic three-jaw chuck 20, a power transmission system 15 is arranged on the upper side of the alternating current motor 39, a second lead screw 23 is horizontally arranged in the lathe bed 47, a sliding plate 43 is horizontally arranged in the lathe bed 47, the sliding plate 43 is positioned above the second lead screw 23, a slide carriage 18 is arranged on the second lead screw 23 in a left-right sliding manner, a tool changing carriage 46 is arranged at the upper end of the slide carriage 18, and the utility model further comprises a continuous scrap shearing system 12, wherein the continuous scrap shearing system 12 comprises a continuous scrap shearing and feeding mechanism 11 and a continuous scrap shearing mechanism 10, and the continuous scrap shearing mechanism 10 is arranged on the continuous scrap shearing and feeding mechanism 11 in a left-right sliding manner.

In one embodiment, the continuous chip shearing and feeding mechanism 11 includes a first lead screw 22 horizontally disposed in the machine tool bed 47 and located above the hydraulic three-jaw chuck 20, a polish rod 21 is disposed above the first lead screw 22 in parallel, a first servo motor 45 is coaxially and rotatably disposed at the right end of the second lead screw 23, and a fourth synchronous belt 17 is disposed between the second lead screw 23 and the first lead screw 22 for synchronous rotation connection.

In one embodiment, the continuous chip shearing mechanism 10 includes a fixed housing 48, a main helical cutting edge 42 is horizontally and rotatably disposed in the fixed housing 48, an auxiliary helical cutting edge 41 is horizontally and rotatably disposed in the fixed housing 48, the auxiliary helical cutting edge 41 is engaged with the main helical cutting edge 42, a driving bevel gear 34 and a driven bevel gear 35 are respectively and coaxially and rotatably disposed at the right end of a main shaft of the main helical cutting edge 42 and the auxiliary helical cutting edge 41, the driving bevel gear 34 is engaged with the driven bevel gear 35, a first lead screw nut 36 is disposed on the upper end face of the fixed housing 48, the first lead screw nut 36 is installed on the first lead screw 22 in a left-right moving manner, and a transmission shaft is rotatably connected to the left end of the main shaft of the main helical cutting edge 42.

In one embodiment, the left end of the main spiral cutting blade 42 is coaxially and rotatably provided with a first lead screw nut 36, the upper end of the fixed housing 48 is provided with a winder 56, the winder 56 comprises a driven bevel gear 37 rotatably arranged in the fixed housing 48, the driven bevel gear 37 is meshed with the first lead screw nut 36, and the middle of the driven bevel gear 37 is provided with a plastic rod 38 extending outwards.

In one embodiment, the upper end surface of the fixed shell 48 is provided with a polish rod slider 49 with a through hole extending upwards, and the polish rod slider 49 is sleeved on the polish rod 21 in a left-right sliding manner;

the first lead screw nut 36 is connected with the first lead screw 22, so that the polished rod slide block 49 is connected with the polished rod 21, the orientation of the continuous chip shearing mechanism 10 is completely fixed, and the continuous chip shearing mechanism 10 is prevented from rotating around the first lead screw 22 to cause injury.

In one embodiment, the power transmission system 15 includes a transmission system 13 and an integrated clutch 14, the transmission system 13 includes a plurality of transmission belts, the integrated clutch 14 is disposed between two transmission belts of the transmission system 13, a right end of the integrated clutch 14 abuts against a left end of the carriage 18, and the ac motor 39 and the hydraulic three-jaw chuck 20 are connected in a synchronous rotation manner through the transmission system 13.

In one embodiment, the integrated clutch 14 includes a synchronizing gear 27, a right end of the synchronizing gear 27 is provided with a hydraulic telescopic rod 24 extending rightward, a right end of the hydraulic telescopic rod 24 is provided with a rubber anti-collision gasket 25, and a right end face of the rubber anti-collision gasket 25 abuts against a left end face of the skateboard carriage 18.

In one embodiment, an oil tank 16 is fixedly arranged on the left end face of the machine tool body 47, the lower end of the oil tank 16 is communicated with a flow pump 40, and the other end of the flow pump 40 is provided with a hydraulic pipe 26 communicated with the inner cavity of the hydraulic telescopic rod 24;

in the existing numerical control lathe, a control system has a memory function on a working cutter position, that is, the control system of the lathe still knows that a plurality of cutters are currently positioned at the working cutter position after continuously controlling the cutter changing frame 46 to perform cutter changing action, because the diameters and the lengths of the cutters at each station are not consistent, the flow pump 40 is driven in the process of performing trial cutter setting at each cutter position, when the cutters move to a position which is not more than five centimeters away from the hydraulic three-jaw chuck 20, the hydraulic telescopic rod 24 is extended by driving the flow pump 40 to enable the rubber anti-collision gasket 25 to be abutted against the left end face of the slide carriage 18, the cutter changing frame 46 is controlled by cutter changing of a machine tool, and the flow pump 40 is controlled to act at the same time, so that the hydraulic telescopic rod 24 always blocks the cutters on the slide carriage 18 at a position which is five centimeters away from the hydraulic three-jaw chuck 20, the device can ensure that a four-station cutter normally carries out cutting speciality, simultaneously, the first synchronous belt 30 is dislocated by the blocking of the hydraulic telescopic rod 24 and cannot transmit torque to the hydraulic three-jaw chuck 20, and simultaneously, the slide carriage box 18 is blocked to avoid the slide carriage box 18 from being continuously fed to cause the damage of the hydraulic three-jaw chuck 20.

In one embodiment, a tension spring 28 extends leftwards from the left end of the integrated clutch 14, and a double anti-loose nut 29 is sleeved on the left end of the tension spring 28

In one embodiment, the transmission system 13 includes a first synchronous belt 30 for synchronously connecting the integrated clutch 14 and the ac motor 39, and a second synchronous belt 31 for synchronously connecting the integrated clutch 14 and the hydraulic three-jaw chuck 20, a first nut seat 55 is fixedly disposed in the machine tool bed 47 above the hydraulic three-jaw chuck 20, a third synchronous belt 32 is disposed between the spindle of the hydraulic three-jaw chuck 20 and the first nut seat 55 for synchronous rotation connection, a flexible transmission shaft 33 extends rightward from the spindle rotating in the first nut seat 55, and the flexible transmission shaft 33 is coaxially and rotatably connected with the main screw cutting edge 42.

In the concrete implementation, when the lathe is in feeding operation and the cutting chips of the workpiece are continuous chips, the alternating current motor 39 is started to transmit power to the hydraulic three-jaw chuck 20 through the transmission system 13, the first servo motor 45 is started to feed the slide carriage 18 towards the hydraulic three-jaw chuck 20 by rotating the second lead screw 23, when the tool at the working tool position on the tool changing frame 46 performs cutting operation, the fourth synchronous belt 17 synchronously transmits the torque of the first servo motor 45 to the first lead screw 22 to enable the continuous chip shearing mechanism 10 and the slide carriage 18 to synchronously move in the left-right direction, the driven bevel gear 37 which continuously rotates drives the plastic rod 38 to rotate when the continuous chips occur on the cutting workpiece, the plastic rod 38 pulls the continuous chips upwards to enable the continuous chips to enter between the auxiliary spiral cutting edge 41 and the main spiral cutting edge 42, and the continuous chips are cut under the meshing of the auxiliary spiral cutting edge 41 and the main spiral cutting edge 42, whenever continuous scraps or discontinuous scraps appear, the plastic rod 38 can effectively pull the continuous scraps into the fixed shell 48 for cutting, a large amount of continuous scraps often appear under the condition that the lathe feed amount is not allowed, and the continuous scraps are likely to be wound on the hydraulic three-jaw chuck 20 to cause the pulling collision between the hydraulic three-jaw chuck 20 and the cutter, the method can avoid the phenomenon, when a program input error causes the slide carriage 18 to overrun, a control system has a memory function on a working cutter position in the existing numerical control lathe, that is, the control system of the lathe still knows that several cutters are currently positioned at the working cutter position after continuously controlling the cutter changing frame 46 to carry out cutter changing action, and as the diameters and the lengths of the cutters at all the positions are not consistent, the flow pump 40 is driven in the process of carrying out trial cutter changing at all the cutter positions to enable the cutter to move to a position which is not more than five centimeters away from the hydraulic three-jaw chuck 20, and the flow pump 40 is driven to extend the hydraulic telescopic rod 24 to enable the rubber anti-collision gasket 25 to be abutted against the left end face of the slide carriage box 18, and controls the flow pump 40 to act while controlling the tool changing of the tool changing rest 46 through the tool changing of the machine tool, so that the hydraulic telescopic rod 24 always blocks the tool on the slide carriage box 18 at a position which is five centimeters away from the hydraulic three-jaw chuck 20, the device can ensure that the four-station cutter normally carries out cutting speciality, simultaneously, the first synchronous belt 30 is dislocated by the blocking of the hydraulic telescopic rod 24 and cannot transmit torque to the hydraulic three-jaw chuck 20, while blocking the carriage 18 from damage to the hydraulic three-jaw chuck 20 as the carriage 18 continues to feed, when the slide carriage 18 is moved to the left, the synchronizing gear 27 returns to the operating position under the action of the tension spring 28 to resume the drive of the drive train 13. It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but other embodiments derived from the technical solutions of the present invention by those skilled in the art are also within the scope of the present invention.