CN215392998U

CN215392998U - Rotary cutting tool for linear cutting parts

Info

Publication number: CN215392998U
Application number: CN202121765646.0U
Authority: CN
Inventors: 张毅; 杨波; 肖宇宽; 黎刚; 李店; 陈伟
Original assignee: Chongqing Huayu Electric Instrument Group Co Ltd
Current assignee: Chongqing Huayu Electric Instrument Group Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-01-04
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a rotary cutting tool for a linear cutting part, which comprises a fixed support, a driving motor, a transmission mechanism and a workpiece clamping jaw, wherein the fixed support is provided with a bearing plate, the driving motor is fixedly arranged on one side of the bearing plate, and the transmission mechanism is connected with the driving motor through a clutch mechanism and comprises a worm, a worm wheel and a worm wheel shaft; the worm is fixedly connected with the bearing plate through the worm seat, the worm wheel shaft is rotatably connected with the bearing plate, one end of the worm wheel shaft is fixedly connected with the worm wheel, the other end of the worm wheel shaft penetrates through the bearing plate to be fixedly connected with the workpiece clamping jaw, and the worm is meshed with the worm wheel. The utility model is arranged on a wire cutting machine, a worm wheel shaft is parallel or vertical to an X, Y shaft of the wire cutting machine, and then a processing part is arranged on a chuck; the machining part is finally driven to rotate through the forward rotation, the reverse rotation and the stop of the driving motor, and the rotary cutting of the machining part by the wire cutting machine is realized.

Description

Rotary cutting tool for linear cutting parts

Technical Field

The utility model relates to the technical field of part cutting, in particular to a rotary cutting tool for a linear cutting part.

Background

In the manufacturing process of machining parts, the shapes of some parts are narrow through grooves, corner cleaning at the periphery and the like, and the parts cannot be machined by traditional turning and milling, and then the machining is finished by electric sparks, wire cutting and the like.

The wire cutting machine uses a moving metal wire as a tool electrode, and pulse current is passed between the metal wire and a workpiece to cut the workpiece by the erosion action of pulse discharge.

The existing linear cutting machine (slow wire moving, medium wire moving and the like) is controlled by two shafts (X, Y) which are vertical to each other and performs wire moving discharge cutting processing. However, for machining a fan-shaped narrow through groove on the upper periphery of a circular shaft-shaped part, as shown in fig. 1, the outer frame of the flexible joint part cannot be directly machined by linear cutting.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a rotary cutting tool for a wire-electrode cutting part, which solves the problem that the conventional wire-electrode cutting machine cannot process the periphery of a round shaft-shaped part.

In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the utility model provides a rotatory cutting frock of wire-electrode cutting part, includes fixing support, driving motor, drive mechanism and work piece clamping jaw, its characterized in that: the fixed support is provided with a bearing plate, the driving motor is fixedly arranged on one side of the bearing plate, the transmission mechanism and the driving motor are positioned on the same side of the bearing plate and are connected with the driving motor through a clutch mechanism, and the transmission mechanism comprises a worm, a worm wheel and a worm wheel shaft; two ends of the worm are respectively connected with the bearing plate through a worm seat and can freely rotate around the axial lead of the bearing plate; the worm wheel is fixedly connected with one end of the worm wheel shaft and is meshed with the worm; the other end of the worm wheel shaft penetrates through the bearing plate and is fixedly connected with the workpiece clamping jaw, and the worm wheel shaft is rotatably connected with the bearing plate.

When the rotary cutting tool is used, the rotary cutting tool is arranged on a machine tool of a wire cutting machine, and the axis line of a worm wheel shaft is parallel to or vertical to the X, Y axis (the moving plane of a machine cutting head) of the wire cutting machine, so that the third axis, namely the rotating axis, of the wire cutting machine is formed by rotary cutting work; then a part to be processed (such as a flexible joint) is arranged on the workpiece clamping jaw; the driving motor drives the worm to rotate through the clutch mechanism, the worm wheel is meshed with the worm, so that the worm rotates to drive the worm wheel to rotate, the worm wheel drives the worm wheel shaft to rotate, finally, the workpiece clamping jaw is driven to rotate through the worm wheel shaft, the machined part is driven to rotate, and the wire cutting machine is used for rotatably cutting and machining the machined part.

Furthermore, the clutch mechanism comprises a driving friction disc and a driven friction disc, the driving friction disc is connected with an output shaft of the driving motor, the driven friction disc is connected with one end, close to the driving motor, of the worm, the driving friction disc and the driven friction disc are tightly attached together, the driving friction disc can drive the driven friction disc to rotate, and the worm is driven to rotate. By adopting the scheme, the driving motor drives the driving friction disc to rotate, the driving friction disc and the driven friction disc mutually rub to transmit torque, so that the driven friction disc rotates, and then the worm is driven to rotate; simple structure, convenient assembly and adjustment.

Furthermore, the clutch mechanism also comprises a compression spring and an adjusting nut, the adjusting nut is in threaded fit with the worm, the compression spring is sleeved on the worm and is positioned between the driven friction disk and the adjusting nut, one end of the compression spring is tightly attached to the driven friction disk, and the other end of the compression spring is tightly attached to the adjusting nut; the driven friction disc is connected with the worm in a sliding fit mode and can drive the worm to rotate synchronously. The position of the adjusting nut is changed by rotating the adjusting nut, so that the compression amount of the compression spring is changed, the compression effect between the driven friction disc and the driving friction disc is better, and the transmission torque is adjusted; when the load is large enough, namely the worm does not rotate, the friction force between the driving friction disc and the driven friction disc pushes the driven friction disc to overcome the pressure of the compression spring, so that the driving friction disc and the driven friction disc are separated (slipped), the torque is not transmitted to the worm, and the motor can be effectively prevented from being damaged.

Furthermore, a limiting mechanism is arranged between the worm wheel and the bearing plate, the limiting mechanism comprises a positioning plate, a stop lever and two limiting columns, the positioning plate is fixed on the bearing plate, a circular arc-shaped through groove is formed in the positioning plate, and the circle center of a circle where the circular arc-shaped through groove is located on the axis of the worm wheel shaft; the two limiting columns are positioned in the circular arc-shaped through groove, are in clearance fit with the circular arc-shaped through groove, and are fastened with the positioning plate through locking nuts; the stop lever and worm wheel fixed connection, and the stop lever can form the interference with spacing post along with the worm wheel rotation in-process. The two limiting columns can be fixed at any position in the circular arc-shaped through groove, and when the cutting tool is used, the positions of the two limiting columns are fixed according to the cutting (slotting) length or radian requirement; the stop lever is positioned between the two limiting columns and is tightly attached to one of the limiting columns; then, starting a driving motor, and finishing processing when the stop lever rotates along with the worm wheel to be in contact with one limiting column; at the moment, the worm wheel cannot rotate continuously, so that a large load is formed and fed back to the worm, and the worm cannot rotate; at this time, the frictional force between the driving friction disk and the driven friction disk pushes the driven friction disk against the pressure of the pressing spring to separate (slip) the driving friction disk and the driven friction disk, thereby not transmitting the torque to the worm and limiting the rotation angle of the cut part.

Furthermore, the radius of a circle where the circular arc-shaped through groove is located is larger than that of the worm wheel; thereby ensure that convex logical groove is located the worm wheel outside, make overall structure more reasonable.

Furthermore, a scale marking layer is arranged on the outer side or the inner side of the circular arc through groove along the extending direction of the circular arc through groove; the limiting angle can be adjusted accurately.

Furthermore, one end of the limiting column, which is close to the bearing plate, is provided with a limiting cap, the other end of the limiting column penetrates through the arc-shaped through groove and then is connected with the locking nut in a threaded fit mode, and one end, which is far away from the limiting cap, of the limiting column extends to one side, which is far away from the positioning plate, of the worm wheel. After the position of the limiting column is adjusted, the limiting column is fixed on the positioning plate through the limiting cap and the locking nut, so that the position of the limiting column is adjusted more conveniently and quickly.

Further, the workpiece clamping jaw comprises a fastening nut and a clamping head, and the fastening nut is in threaded connection with the clamping head; the clamping head comprises a connecting column and a plurality of arc-shaped clamping blocks distributed around one circle of the end face of one end of the connecting column, the diameter of a circle where the inner end of each arc-shaped clamping block is located is smaller than that of a circle where the outer end of each arc-shaped clamping block is located, so that the arc-shaped clamping blocks are integrally horn-shaped, and a gap is formed between every two adjacent arc-shaped clamping blocks; the inner hole of the fastening nut is a stepped hole, the small-diameter section of the fastening nut is provided with an internal thread, the small-diameter section of the fastening nut is connected with the connecting column in a threaded fit mode, the large-diameter section of the fastening nut is sleeved with the arc-shaped clamping block, and the diameter of the large-diameter section of the fastening nut is larger than that of a circle where the inner end of the arc-shaped clamping block is located and smaller than that of a circle where the outer end of the arc-shaped clamping block is located. The clamping of the machined part is realized through the chuck, the arc-shaped clamping block is gradually sleeved into the fastening nut in the process of connecting the fastening nut with the chuck through threads, the clamping force of the arc-shaped clamping block on the machined part is gradually increased, and the clamping of the machined part is realized; the clamp is particularly suitable for clamping cylindrical workpieces or cylindrical workpieces; adopt this work piece clamping jaw, can press from both sides tightly the work piece of equidimension not. Simultaneously, according to the different grade type of processing part, removable corresponding chuck can cut the part of different grade type, and the practicality is strong.

Furthermore, a connecting column of the chuck is connected with a worm gear shaft through a connecting screw, two sides of the connecting screw are respectively provided with a rotation stopping pin, and the rotation stopping pins penetrate through the connecting column and are detachably connected with the worm gear shaft; thereby ensuring that the workpiece clamping jaw can synchronously rotate along with the worm wheel shaft.

Furthermore, the inner hole of the large-diameter section of the fastening nut is a tapered hole, and the diameter of the outer end of the tapered hole is smaller than that of the inner end of the tapered hole; the clamping device can effectively clamp a workpiece with a smaller diameter, and further improves the application range.

Compared with the prior art, the utility model has the following advantages:

(1) installing the rotary cutting tool on a machine tool of a wire cutting machine, wherein the axis of a worm wheel shaft is parallel to or vertical to an X, Y axis (a machine cutting head moving plane) of the wire cutting machine, so that the rotary cutting work forms a third axis, namely a rotating axis, of the wire cutting machine; then a part to be processed (such as a flexible joint) is arranged on the workpiece clamping jaw; the driving motor drives the worm to rotate through the clutch mechanism, the worm wheel is meshed with the worm, so that the worm rotates to drive the worm wheel to rotate, the worm wheel drives the worm wheel shaft to rotate, finally, the workpiece clamping jaw is driven to rotate through the worm wheel shaft, the machined part is driven to rotate, and the wire cutting machine is used for rotatably cutting and machining the machined part.

(2) A third shaft is added to the linear cutting machine, so that the processing range of the linear cutting machine is expanded; the tool is accurate in positioning, convenient to replace and simple to manufacture, and can effectively improve efficiency and reduce cost in batch production.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure of the workpiece holding jaw of the present invention.

Fig. 3 is a schematic view of the assembly structure of the worm in the present invention.

Fig. 4 is a schematic structural view of the limiting mechanism of the present invention.

The clamping device comprises a fixed support 1, a driving motor 2, a worm 31, a worm gear 32, a worm wheel 33, a worm seat 4, a workpiece clamping jaw 41, a fastening nut 42, a connecting column 43, a clamping block 51, a driving friction disc 52, a driven friction disc 53, a compression spring 54, an adjusting nut 61, a positioning plate 62, a stop lever 63, a limiting column 64, a through groove 65, a locking nut 65, a backing plate 66, a connecting screw 7 and a rotation stopping pin 8.

Detailed Description

The utility model will be further explained with reference to the drawings and the embodiments.

Example (b): referring to fig. 1-4, a rotary cutting tool for a linear cutting part comprises a fixed support 1, a driving motor 2, a transmission mechanism and a workpiece clamping jaw 4. The fixed support 1 is provided with a bearing plate, and in specific implementation, the fixed support 1 further comprises a bottom plate, and a mounting hole is formed in the bottom plate and used for being connected with a machine tool of the cutting machine. The bearing plate is arranged on the bottom plate, and the whole fixed support 1 is L-shaped or T-shaped. The driving motor 2 is fixedly arranged on one side of the bearing plate, the transmission mechanism and the driving motor 2 are positioned on the same side of the bearing plate and are connected with the driving motor 2 through a clutch mechanism, and the driving motor 2 comprises a worm 31, a worm wheel 32 and a worm wheel 32 shaft; two ends of the worm 31 are respectively connected with the bearing plate through a worm seat 33 and can freely rotate around the axis line of the bearing plate; the worm wheel 32 is fixedly connected with one end of a worm wheel shaft and is meshed with the worm 31; the other end of the worm gear 32 shaft penetrates through the bearing plate and then is fixedly connected with the workpiece clamping jaw 4, and the worm gear 32 shaft is rotatably connected with the bearing plate.

In specific implementation, the clutch mechanism comprises a driving friction disc 51 and a driven friction disc 52, the driving friction disc 51 is connected with an output shaft of the driving motor 2, the driven friction disc 52 is connected with one end, close to the driving motor 2, of the worm 31, the driving friction disc 51 and the driven friction disc 52 are tightly attached together, and the driving friction disc 51 can drive the driven friction disc 52 to rotate and drive the worm 31 to rotate. By adopting the scheme, the driving motor 2 drives the driving friction disc 51 to rotate, the driving friction disc 51 and the driven friction disc 52 rub with each other to transmit torque, so that the driven friction disc 52 rotates, and then the worm 31 is driven to rotate; simple structure, convenient assembly and adjustment. As an embodiment, the clutch mechanism further comprises a compression spring 53 and an adjusting nut 54, the adjusting nut 54 is in threaded fit with the worm 31, the compression spring 53 is sleeved on the worm 31 and located between the driven friction disc 52 and the adjusting nut 54, one end of the compression spring is tightly attached to the driven friction disc 52, and the other end of the compression spring is tightly attached to the adjusting nut 54; the driven friction disc 52 is connected with the worm 31 in a sliding fit manner through a sliding key or a pin shaft, and can drive the worm 31 to rotate synchronously. The position of the adjusting nut 54 is changed by rotating the adjusting nut 54, so that the compression amount of the compression spring 53 is changed, the compression effect between the driven friction disc 52 and the driving friction disc 51 is better, and the transmission torque is adjusted; when the load is large enough, that is, the worm 31 does not rotate, the friction force between the driving friction disc 51 and the driven friction disc 52 pushes the driven friction disc 52 against the pressure of the compression spring 53, so that the driving friction disc 51 and the driven friction disc 52 are separated (slipped), and torque is not transmitted to the worm 31, which can effectively prevent the motor from being damaged.

A limiting mechanism is arranged between the worm wheel 32 and the bearing plate, the limiting mechanism comprises a positioning plate 61, a stop lever 62 and two limiting columns 63, the positioning plate 61 is fixed on the bearing plate, a circular arc through groove 64 is arranged on the positioning plate 61, and the circle center of the circle where the circular arc through groove 64 is located on the axis of the worm wheel 32 shaft. The two limiting columns 63 are positioned in the circular arc through groove 64, are in clearance fit with the circular arc through groove 64, and are fastened with the positioning plate 61 through locking nuts 65; the stop lever 62 is fixedly connected with the worm wheel 32, and the stop lever 62 can interfere with the limiting column 63 in the rotating process along with the worm wheel 32. The radius of the circle where the circular arc through groove 64 is located is larger than that of the worm wheel 32; thereby ensuring that the circular arc through groove 64 is positioned outside the worm wheel 32 and leading the whole structure to be more reasonable. The outer side or the inner side of the circular arc through groove 64 is provided with a scale marking layer along the extending direction; the limiting angle can be adjusted accurately. One end of the limiting column 63, which is close to the bearing plate, is provided with a limiting cap, the other end of the limiting column passes through the circular arc through groove 64 and then is connected with the locking nut 65 in a threaded fit manner, and one end of the limiting column 63, which is far away from the limiting cap, extends to one side of the worm wheel 32, which is far away from the positioning plate 61. After the position of the limiting column 63 is adjusted, the limiting column 63 is fixed on the positioning plate 61 through the limiting cap and the locking nut 65, so that the position of the limiting column 63 can be adjusted more conveniently and quickly. Preferably, a cushion block 66 is further arranged between the positioning plate 61 and the bearing plate, so that a gap is formed between the positioning plate 61 and the bearing plate, and the width of the gap is greater than the thickness of the limiting cap, so that the adjustment and positioning of the limiting column 63 are more convenient.

The two limiting columns 63 can be fixed at any position in the circular arc through groove 64, and when the cutting tool is used, the positions of the two limiting columns 63 are fixed according to the cutting (slotting) length or radian requirement; the stop lever 62 is positioned between the two limiting columns 63 and is tightly attached to one of the limiting columns 63; then, the driving motor 2 is started, and when the stop lever 62 rotates along with the worm wheel 32 to be in contact with one of the limiting columns 63, the processing is completed; at this time, the worm wheel 32 cannot rotate continuously, so that a large load is formed, and the large load is fed back to the worm 31, so that the worm 31 cannot rotate; at this time, the frictional force between the driving friction disk 51 and the driven friction disk 52 pushes the driven friction disk 52 against the pressure of the pressing spring 53 to separate (slip) the driving friction disk 51 and the driven friction disk 52, thereby limiting the rotation angle of the cut part without transmitting the torque to the worm 31.

The workpiece clamping jaw 4 comprises a fastening nut 41 and a clamping head, and the fastening nut 41 is in threaded connection with the clamping head. The chuck comprises a connecting column 42 and a plurality of arc-shaped clamping blocks 43 distributed around one end face of one end of the connecting column 42, the diameter of a circle where the inner end of each arc-shaped clamping block 43 is smaller than that of a circle where the outer end of each arc-shaped clamping block is located, so that the arc-shaped clamping blocks 43 are integrally horn-shaped, and a gap is formed between every two adjacent arc-shaped clamping blocks 43. The inner hole of the fastening nut 41 is a stepped hole, the small-diameter section of the fastening nut 41 is provided with an internal thread, the small-diameter section of the fastening nut 41 is in threaded fit connection with the connecting column 42, the large-diameter section of the fastening nut 41 is sleeved in the arc-shaped clamping block 43, and the diameter of the large-diameter section of the fastening nut 41 is larger than that of a circle where the inner end of the arc-shaped clamping block 43 is located and smaller than that of a circle where the outer end of the arc-shaped clamping block 43 is located. The clamping of the machined part is realized through the chuck, in the process of connecting the fastening nut 41 with the chuck through threads, the arc-shaped clamping block 43 is gradually sleeved into the fastening nut 41, the clamping force of the arc-shaped clamping block 43 on the machined part is gradually increased, and the clamping of the machined part is realized; the clamp is particularly suitable for clamping cylindrical workpieces or cylindrical workpieces; by adopting the workpiece clamping jaw 4, workpieces with different sizes can be clamped. Simultaneously, according to the different grade type of processing part, removable corresponding chuck can cut the part of different grade type, and the practicality is strong. In implementation, the connecting column 42 is a stepped column, and the arc-shaped clamping block 43 is connected with the end face of the large-diameter section of the stepped column; this facilitates the connection of the fastening nut 41 to the collet and better clamping of the workpiece. The inner hole of the large-diameter section of the fastening nut 41 is a tapered hole, and the diameter of the outer end of the tapered hole is smaller than that of the inner end of the tapered hole; the clamping device can effectively clamp a workpiece with a smaller diameter, and further improves the application range.

A connecting column 42 of the chuck is connected with a worm wheel 32 shaft through a connecting screw 7, two sides of the connecting screw 7 are respectively provided with a rotation stopping pin 8, and the rotation stopping pins 8 are detachably connected with the worm wheel 32 shaft after penetrating through the connecting column 42; thereby ensuring that the workpiece holding jaw 4 can rotate synchronously with the worm wheel 32 shaft.

When the scheme is used, the rotary cutting tool is arranged on a machine tool of the wire cutting machine, and the axial lead of the worm gear 32 shaft is parallel or vertical to the X, Y shaft (the moving plane of a machine cutting head) of the wire cutting machine, so that the rotary cutting work forms the third shaft of the wire cutting machine, namely the rotating shaft; then a part to be processed (such as a flexible joint) is arranged on the workpiece clamping jaw 4; the driving motor 2 drives the worm 31 to rotate through the clutch mechanism, and the worm wheel 32 is meshed with the worm 31, so that the worm 31 rotates to drive the worm wheel 32 to rotate, the worm wheel 32 drives the worm wheel 32 to rotate, and finally the workpiece clamping jaw 4 is driven to rotate through the worm wheel 32 to drive a machined part to rotate, and the rotary cutting machining of the machined part by the wire cutting machine is realized.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.

Claims

1. The utility model provides a rotatory cutting frock of wire-electrode cutting part, includes fixing support, driving motor, drive mechanism and work piece clamping jaw, its characterized in that: the fixed support is provided with a bearing plate, the driving motor is fixedly arranged on one side of the bearing plate, the transmission mechanism and the driving motor are positioned on the same side of the bearing plate and are connected with the driving motor through a clutch mechanism, and the transmission mechanism comprises a worm, a worm wheel and a worm wheel shaft; two ends of the worm are respectively connected with the bearing plate through a worm seat and can freely rotate around the axial lead of the bearing plate; the worm wheel is fixedly connected with one end of the worm wheel shaft and is meshed with the worm; the other end of the worm wheel shaft penetrates through the bearing plate and is fixedly connected with the workpiece clamping jaw, and the worm wheel shaft is rotatably connected with the bearing plate.

2. The rotary cutting tool for the wire-electrode cutting parts according to claim 1, characterized in that: the clutch mechanism comprises a driving friction disc and a driven friction disc, the driving friction disc is connected with an output shaft of the driving motor, the driven friction disc is connected with one end, close to the driving motor, of the worm, the driving friction disc and the driven friction disc are tightly attached together, the driven friction disc can be driven to rotate through the driving friction disc, and the worm is driven to rotate.

3. The rotary cutting tool for the wire-electrode cutting parts as claimed in claim 2, wherein: the clutch mechanism also comprises a compression spring and an adjusting nut, the adjusting nut is in threaded fit with the worm, the compression spring is sleeved on the worm and is positioned between the driven friction disk and the adjusting nut, one end of the compression spring is tightly attached to the driven friction disk, and the other end of the compression spring is tightly attached to the adjusting nut; the driven friction disc is connected with the worm in a sliding fit mode and can drive the worm to rotate synchronously.

4. The rotary cutting tool for the wire-electrode cutting parts according to claim 1, characterized in that: a limiting mechanism is arranged between the worm wheel and the bearing plate, the limiting mechanism comprises a positioning plate, a stop lever and two limiting columns, the positioning plate is fixed on the bearing plate, a circular arc through groove is formed in the positioning plate, and the circle center of a circle where the circular arc through groove is located on the axis of the worm wheel shaft; the two limiting columns are positioned in the circular arc-shaped through groove, are in clearance fit with the circular arc-shaped through groove, and are fastened with the positioning plate through locking nuts; the stop lever and worm wheel fixed connection, and the stop lever can form the interference with spacing post along with the worm wheel rotation in-process.

5. The rotary cutting tool for the wire-electrode cutting parts according to claim 4, characterized in that: the radius of the circle where the circular arc-shaped through groove is located is larger than that of the worm wheel.

6. The rotary cutting tool for the wire-electrode cutting parts according to claim 4, characterized in that: and a scale marking layer is arranged on the outer side or the inner side of the circular arc through groove along the extending direction of the circular arc through groove.

7. The rotary cutting tool for the wire-electrode cutting parts according to claim 4, characterized in that: one end of the limiting column, which is close to the bearing plate, is provided with a limiting cap, the other end of the limiting column penetrates through the arc-shaped through groove and then is connected with the locking nut in a threaded fit mode, and one end, which is far away from the limiting cap, of the limiting column extends to one side, which is far away from the positioning plate, of the worm wheel.

8. The rotary cutting tool for the wire-electrode cutting parts according to claim 1, characterized in that: the workpiece clamping jaw comprises a fastening nut and a clamping head, and the fastening nut is in threaded connection with the clamping head; the clamping head comprises a connecting column and a plurality of arc-shaped clamping blocks distributed around one circle of the end face of one end of the connecting column, the diameter of a circle where the inner end of each arc-shaped clamping block is located is smaller than that of a circle where the outer end of each arc-shaped clamping block is located, so that the arc-shaped clamping blocks are integrally horn-shaped, and a gap is formed between every two adjacent arc-shaped clamping blocks; the inner hole of the fastening nut is a stepped hole, the small-diameter section of the fastening nut is provided with an internal thread, the small-diameter section of the fastening nut is connected with the connecting column in a threaded fit mode, the large-diameter section of the fastening nut is sleeved with the arc-shaped clamping block, and the diameter of the large-diameter section of the fastening nut is larger than that of a circle where the inner end of the arc-shaped clamping block is located and smaller than that of a circle where the outer end of the arc-shaped clamping block is located.

9. The rotary cutting tool for the wire-electrode cutting parts according to claim 8, characterized in that: the connecting column of the chuck is connected with the worm gear shaft through a connecting screw, two sides of the connecting screw are respectively provided with a rotation stopping pin, and the rotation stopping pins penetrate through the connecting column and then are detachably connected with the worm gear shaft.

10. The rotary cutting tool for the wire-electrode cutting parts according to claim 8, characterized in that: the large-diameter section inner hole of the fastening nut is a tapered hole, and the diameter of the outer end of the large-diameter section inner hole is smaller than that of the inner end of the large-diameter section inner hole.