69 results about "Morse taper" patented technology

A device is used to treat periprosthetic fractures, such as a fracture below the stem of a total hip replacement (THR). The device includes a clamp that is fixed to the exposed stem of the THR and a coupling, such as a morse taper, extending distally away from the stem. A post is inserted into the canal of the distal femur below the fracture. The post has a coupling extending proximally away from the distal femur. The couplings on the clamp and post are joined to create a stable connection between the patient's hip and distal femur. Instead of connecting the clamp with the post directly, one or more adapters may be provided to adjust the length and angulation of the treated limb. The device may also connect a THR stem with a Total Knee Arthroplasty (TKA) that includes a stem.

The invention relates to the technical field of steel rolling, and discloses a novel gear box type wear-resistant disc side guide plate before hot rolling and coiling, which comprises a roller bed supporting beam, a hydraulic push rod is assembled on the side wall of the roller bed supporting beam, a guide plate beam is fixedly connected to the output end of the hydraulic push rod, a disc taper shank is assembled in the guide plate beam, and the disc taper shank is fixedly connected to the output end of the hydraulic push rod. A disc lining plate is connected to the outer portion of the disc taper shank in an interference fit mode, the disc taper shank is sleeved with a gear shaft, the interior of the gear shaft is in threaded connection with a screw rod, and the screw rod penetrates through a center hole of the gear shaft and extends into the disc taper shank. According to the novel gearbox type wear-resistant disc side guide plate before hot rolling and coiling, an integrated rotating body is combined through the pre-tightening force of the bolts, so that only one nut is needed for disassembling and assembling the disc; the rotation axis of the disc is ensured to be highly overlapped with the axis of the gear shaft by utilizing the Morse taper, so that the bending moment resistance and the radial impact load bearing capacity of the disc are greatly improved.

The utility model discloses a boring cutter with large boring amount, which comprises a cutter holder and a boring cutter body, and a cutter handle with Morse taper is coaxially and fixedly arranged at the rear end of the boring cutter body; the tool clamps are arranged at the front end of the boring tool body, the number of the tool clamps is at least two, the tool clamps are symmetrically arranged relative to the center of the boring tool body, a slope sliding connection mechanism is arranged between the rear ends of the tool clamps and the front end of the boring tool body in a matched mode, and the slope of the slope sliding connection mechanism is obliquely arranged in the front-back direction. A blade mounting seat is arranged at the front outer side end of the cutter holder, a blade is detachably mounted on the blade mounting seat, and a cutter holder positioning and locking mechanism is further arranged between the cutter holder and the boring cutter body. According to the boring cutter with the large boring amount, the larger boring amount can be achieved in the one-time feeding boring process, meanwhile, the stepped boring function can be achieved, and the boring cutter is particularly suitable for the rough boring procedure with the large machining allowance.

The utility model discloses a double-crown repairing device for the upper part of an implant denture, and belongs to the technical field of denture implantation. The device mainly comprises an abutment, an inner crown sleeve, an outer crown sleeve and a fastening screw, the inner crown sleeve is fixedly sleeved on the abutment through the fastening screw, the outer crown sleeve is detachably sleeved on the inner crown sleeve, and the Morse taper between the inner crown sleeve and the outer crown sleeve is 4-6 degrees, so that the inner crown sleeve and the outer crown sleeve are combined to achieve retention. The device is scientific in design, reasonable in structure, easy to operate and convenient to use, the requirement for a common positioning path is greatly reduced by using the device, and the common positioning path is actually designed in the device, so that clinicians can master the device more easily, controllability of the clinicians is greatly facilitated, sensitivity of technical requirements is reduced, and the device is suitable for popularization and application. And repairing, taking and wearing are easier, and periodontal health is protected.

The utility model discloses a motor rotor shaft turning clamp that can be self-adaptive and tightly hold and flexibly position, relates to the field of machining, and is composed of Morse taper, external thread connecting shaft, spring collet, threaded sleeve and adjusting sleeve and other components for connecting with the main shaft of machine tool. The sliding cavity of the front end of the external thread connecting shaft is provided with a sliding sleeve and a telescopic spring, and the sliding sleeve is fixedly connected with the spring collet. The sleeve sleeve of the front end of the threaded sleeve is sleeved outside the spring collet, and the inner wall of the front end is provided with a conical surface that is matched with the conical head of the spring collet. The adjusting sleeve is connected with the threaded sleeve through threads, and can drive the limiting sleeve to push the spring collet to move. During use, rotating the adjusting sleeve makes the spring collet move backward, and the spring collet is tightened under the action of the conical surface, the rotor shaft is self-adaptively and tightly held, and the telescopic spring realizes flexible positioning and compensates for the axial and angular deviation. The clamp can automatically adapt to the rotor shaft with a diameter tolerance within a certain range, has high self-centering precision, is suitable for high-precision turning machining of conventional rotor shafts, and has simple structure and convenient maintenance.

The utility model provides a shell nosing clamp of a rod end knuckle bearing, which belongs to the technical field of rod end knuckle bearing processing and comprises a horizontally arranged base, an annular circular truncated cone protruding upwards is arranged in the middle of the upper surface of the base, a guide mandrel is vertically arranged in the middle of the circular truncated cone, and the lower end of the guide mandrel is fixed in the circular truncated cone. The upper end of the guide mandrel is vertically provided with a Morse taper shank with an upward taper part, the lower end of the Morse taper shank is arranged at the upper end of the guide mandrel in a sleeving manner and is in sliding connection with the guide mandrel, and the lower surface of the Morse taper shank is provided with a plurality of steel balls. The problems that the inner ring arc groove part of the rod end knuckle bearing is inconsistent in stress, so that the polishing smoothness is low and uneven, and the smoothness of each part cannot be well polished to be the same are solved, and therefore the qualified rate of finished products is increased, the situation of large-amount reworking is avoided, the labor intensity of workers is reduced, and the working efficiency is further improved.

The utility model relates to a hole grinding clamp which is characterized in that the clamp is a Morse taper shank, external threads are arranged on the side face of one end of the clamp, and two threaded holes are symmetrically formed in one end of the clamp; a positioning hole is formed in the center position of the positioning plate, the positioning hole is used for placing a workpiece to be machined, two first through holes are symmetrically formed in the positioning plate, and bolts sequentially penetrate through the first through holes and the threaded holes and fixedly connect the positioning plate with the clamp; the locking nut is provided with a limiting hole corresponding to the machined part, the locking nut is in threaded connection with the external thread at one end of the clamp, and the machined part is limited in the positioning hole. For different special-shaped workpieces, the corresponding positioning plates can be replaced for placing the workpieces to be machined, and then hole grinding machining is carried out.

The utility model discloses a punching device for machining, which relates to the technical field of drilling equipment, comprises a base with a rubber shock pad and an inverted U-shaped framework, and is provided with punching feeding, executing, clamping, cooling and chip removing parts. According to the punching feeding component, a servo motor drives a guide screw to drive a vertical block to achieve accurate feeding; a driving motor in the punching execution part is connected with a rotating rod and a drill bit, and the rotating rod and the drill bit are connected through Morse taper and convenient to replace. The clamping part controls a clamping strip plate through an adjusting screw rod, and different workpieces can be fixed. The cooling component conveys cooling liquid through a centrifugal pump to cool the drill bit through a rotating rod cooling channel, and chippings are cleaned through a chip groove and a recycling box. The device can conduct high-precision punching, is suitable for various workpieces, effectively dissipates heat and removes chips, improves the machining punching quality and efficiency, and is suitable for various mechanical manufacturing fields.

The thread machining cutter handle comprises a Morse taper shank cutter bar, one end of the Morse taper shank cutter bar is connected with the lathe tailstock, the other end of the Morse taper shank cutter bar is provided with an inner round hole coaxial with a Morse taper shank, the inner round hole is used for installing a fixing sleeve, one end of the fixing sleeve is a screw tap end, and the other end of the fixing sleeve is a threading die end. The utility model relates to the technical field of thread machining, the novel thread machining cutter handle is used in cooperation with a lathe tailstock, potential safety hazards caused by rotation of parts when a screw tap or a threading die is manually operated are avoided, and the novel thread machining cutter handle is simple in structure, convenient to use and high in machining efficiency. An operator is separated from a rotating part, so that the personal safety of the operator is guaranteed; the cutter handle is a dual-purpose tool capable of machining external threads and internal threads, machining of various threads can be achieved, one set of tool meets various requirements, and the universality and practicability of the tool are improved.

The utility model discloses an elastic tailstock structure for a worm grinding wheel gear grinding machine, which comprises a sliding plate body and a servo driving mechanism, the sliding plate body is arranged on the gear grinding machine in a sliding manner, the servo driving mechanism is used for pushing the sliding plate body to slide, and the sliding plate body is provided with a Morse taper tip which is used for contacting a gear to abut against the gear; the servo driving mechanism comprises a servo motor and a ball screw connected with the driving end of the servo motor, a nut of the ball screw is matched with an upper gland on the sliding plate body through a crimping assembly, and a first elastic assembly used for transmitting pressure of the servo driving mechanism is arranged between the upper gland and the sliding plate body; a screw rod of the ball screw is arranged in the sliding plate body in a penetrating manner; a second elastic component for balancing the overall gravity of the sliding plate body is arranged at the end part of the screw rod of the ball screw; the first elastic assembly is used for absorbing and storing pressure for pressing workpieces, rotation of the ball screw can be adjusted according to needs for the workpieces with different materials, hardness and machining requirements, so that the pressure of the spring is adjusted, and finally the pressing force is adjusted.

The invention relates to a lathe system improvement method which comprises the following steps: step 1, dismounting a large carriage assembly, mounting a customized supporting seat, a chuck connecting flange and an adapter sleeve, and reinforcing through welding and bolt connection to ensure the structural stability and the machining precision, and step 2, adding a copper sheet gasket below a chuck to reduce vibration; the method comprises the following steps of 1, using an M16 * 850 screw rod to stabilize a cutter bar to avoid displacement in the machining process, 2, using a lathe spindle Morse taper hole to install a boring cutter bar to ensure the consistency of the boring depth and diameter, 3, installing an automatic direction adjusting mechanism on a lathe guide rail to simplify the steel pipe steering process and improve the machining continuity and safety, and 5, designing a periodic self-checking mechanism. And the aperture size is detected in combination with a trial assembly method, so that the quality consistency of each processing batch is ensured. According to the scheme, the machining process is optimized, efficient and precise boring machining of the two ends of the steel pipe is achieved, and labor intensity and production cost are effectively reduced.

An implant is disclosed that has a base member, an articulating member, and a coupling portion that secures the base member to the articulating member. A shoulder implant that has a baseplate, an articulating component, and a fixation component is disclosed. The baseplate includes a first side that has a first Morse taper that is offset from a center line of the baseplate and a second side that has a post that is offset from the center line of the baseplate. The articulating component is attachable to the baseplate. The articulating component includes a second Morse taper that is offset from a center of the articulating component. A threaded through hole extends from a first side of the articulating component to a second side thereof. The through hole can be aligned with the second Morse taper. The fixation component can engage the through hole and is contained within a cavity of the baseplate by a spring and a cap.

The utility model relates to the technical field of medical instruments, in particular to a tibia alignment tool under a navigation system, which comprises an intramedullary positioning rod, one end of the intramedullary positioning rod is connected with a tibia in a pluggable manner, and an intramedullary positioning frame component is mounted on one side of the tibia and positioned on the outer wall of the intramedullary positioning rod. According to the tibia osteotomy guider, the angle limiting hole and the eccentric knob are arranged in the intramedullary positioning frame assembly, the angle position of the intramedullary positioning frame assembly is adjusted only by inserting the eccentric knob into the angle limiting hole for fixing, the locking shaft can be rotated by screwing the handle, and the position of the tibia osteotomy guider is adjusted. The tibia osteotomy guider can be better attached to the outer wall of the tibia for accurate positioning, one end of the button block compresses the spring to move, meanwhile, the other end of the button block is warped, then the button block and the transverse Morse taper hole are disconnected, the transfer rod body can be flexibly replaced and detached, installation is more convenient, and positioning is accurate.

The cutting tool includes a replaceable cutting head, which includes a front cutting portion, a rear assembly portion, and a head through-hole extending through the front cutting portion and the rear assembly portion. The assembly portion includes a male coupling member, which includes a conical head contact surface. The cutting tool includes a female coupling member, which includes a conical front holder contact surface and a female threaded portion. The cutting tool includes a fastening member having a male threaded portion. When the cutting tool is in the locked position, the male coupling member is removably held within the female coupling member by the fastening member located within the head through-hole, and the fastening member's male threaded portion and the holder's female threaded portion screw into each other. The head contact surface contacts the front holder contact surface, thereby creating a Morse tapered connection between the male coupling member and the female coupling member.

The utility model relates to the technical field of shielding cylinder machining, in particular to a shielding cylinder extrusion forming tool which comprises a forming cutter body assembly and a forming outer sleeve assembly, the forming cutter body assembly comprises an extrusion cutter body, a Morse taper shank is installed on the left side of the extrusion cutter body, and a fixing plug pin is installed on the left side of the surface of the extrusion cutter body in a penetrating mode. A rotating shaft pin is fixedly mounted on the left side of the surface of the extrusion cutter body, an extrusion wrench movably sleeves the surface of the rotating shaft pin, an extrusion fork frame sleeves the center of the surface of the extrusion wrench and located in an inner cavity of the extrusion cutter body, and an extrusion pressing rod is slidably mounted in the center of the right side of the extrusion fork frame. The forming cutter body assembly and the forming outer sleeve assembly are used in a matched mode, the shielding cylinder forming device has the advantage of extrusion machining, the shielding cylinder can be contained through the outer sleeve, the bearing is expanded outwards through displacement of the extrusion cutter body, the shielding cylinder is well extruded and machined under driving of an external machine tool spindle, and the machining roundness and the machining precision of the shielding cylinder are guaranteed.

The utility model discloses a repairing cutter of an ultrasonic welding sealing machine, relates to the technical field of machining, and mainly aims to provide a tool which is matched with a machine tool to repair reticulate patterns of a welding head mold of the ultrasonic welding sealing machine. According to the main technical scheme, the repairing cutter of the ultrasonic welding sealing machine comprises a connecting body and a spacing pad, the connecting body comprises a cone and a cylinder, the large head end of the cone is coaxially connected to one end of the cylinder, and the other end of the cylinder is sequentially connected to the centers of the multiple circular saw blades. Each spacing pad is arranged between every two adjacent circular saw blades; wherein the small head end of the cone is correspondingly inserted into a Morse taper hole of a machine tool.

The utility model discloses a personalized root type implant. Comprising an implant body, a central screw hole is formed in the upper end of the implant body, a Morse taper hole is formed in the upper portion of the central screw hole, and an inner hexagonal base hole is formed in the upper end of the Morse taper hole; the implant made of Ti-Ta alloy is close to a bone tissue of a human body, so that the stress shielding effect is effectively reduced; meanwhile, due to the introduction of tantalum, the corrosion resistance and bone combining capacity of the material are improved; a 3D printing technology is adopted to realize that the implant is completely matched with a tooth extraction socket in shape, and bone holes and convex blocks of a bionic bone trabecula porous structure are constructed on the surface of the interior part of a bone, so that the implant is convenient to mount in a tooth socket; the central screw hole and the Morse taper hole are designed at the upper end of the implant, so that the false tooth is conveniently mounted and connected, and the inner hexagonal base hole is formed at the upper end of the implant, so that the connection stability of the false tooth is conveniently improved, and the false tooth is prevented from rotating and falling off.

The utility model relates to a finish machining combined cutter for a valve guide pipe and a valve seat of a cylinder head, which is characterized by comprising a guide pipe reamer, a cutter base body and a cutter handle, the guide pipe reamer comprises a blade part and a base body connecting part, the blade part comprises a blade head and a blade rod which are connected into a whole, the blade rod is fixedly connected with the base body connecting part, and the cutter handle is fixedly connected with the blade head. The cutter base body is provided with a blade rod connecting hole and a reamer connecting inner hole which are coaxially arranged, the conduit reamer is matched and connected with the cutter base body, meanwhile, the base body connecting part is matched and in threaded connection with the reamer connecting inner hole, the blade rod is in Morse taper fit with the blade rod connecting hole, and the tail part of the cutter base body is detachably connected with the cutter handle. Radial deflection of the guide pipe reamer does not need to be adjusted, tool changing time is short, and efficiency is high.

The application discloses a special clamp for thin-wall part machining, which comprises a clamp body, a locking nut and a spring tube. The clamp body is provided with a bulging part with Morse taper at one end and an outer threaded section in the middle. The spring tube is sleeved on the outer periphery of the bulging part, and is provided with an annular groove at one end and an elastic groove in the tube wall at the other end. The locking nut is threadedly connected to the clamp body, and is provided with a stop pin on the side wall. The end of the stop pin is extended and inserted into the annular groove of the spring tube, so that the locking nut and the spring tube are relatively fixed in the axial direction but can relatively rotate in the circumferential direction. A rotation-preventing cooperation structure is further arranged between the clamp body and the spring tube. The application realizes the rotation decoupling design of the locking nut and the spring tube, converts the rotary motion of the nut into the pure axial movement of the spring tube, eliminates the following rotation torque in the clamping process, realizes the uniform stress by cooperation with the taper bulging, effectively solves the problems of the deformation and scratch of the thin-wall part during clamping, and has the active unloading function.

An improved modular rotational device includes a first and second threaded coupler for affixation along the stem of an endoprosthetic device, for example, a humeral prosthesis or a femoral prosthesis. The rotational device axis of rotation is coaxial with the stem, and its axis of rotation is located in close proximity to the intramedullary stem of the prosthesis or in close proximity to the distal articulation of the prosthesis. A housing has a proximal and distal end with an axial bore therethrough for receiving an elongated stem of the device. A lobe ring may be utilized to limit the axis of rotation of the device. Additional endoprosthetic devices may be attached to male or female threaded couplers, or to Morse tapers. A plurality of suture attachments facilitates attachment of soft tissue thereto.

The portable drilling machine comprises a base, fixing frames are installed at the upper end of the base, a shell is installed between the fixing frames, a Morse taper sleeve is installed in the middle of the bottom end of the shell, a drill bit is connected to the bottom end of the Morse taper sleeve, and a fixing disc is arranged at the top end of the shell. The drilling machine has the beneficial effects that the hand wheel and the adjuster are arranged to drive the sliding rod to ascend and descend in the fixing rod, overall ascending and descending of the shell and the hydraulic motor are achieved, ascending and descending operation can be achieved without additionally connecting other parts, and therefore the using convenience of the drilling machine is improved; and a matched external connecting base can be conveniently installed and connected, fixing can be conducted in a magnetic attraction mode and a bolt connection mode, and therefore the using effect when the drilling machine is erected is improved.

The utility model relates to a mechanism for processing a seam allowance of a servo motor, and relates to the technical field of mechanical tools. The locking sleeve is fixedly arranged in the servo motor rotor; the positioning assembly is used for positioning the servo motor stator and the locking sleeve, the positioning assembly comprises a core shaft and a Morse taper shank, the core shaft is arranged in the servo motor stator in a penetrating mode, and the Morse taper shank is fixedly installed at one end of the core shaft; and the extrusion assembly is used for carrying out deformation treatment on the locking sleeve so as to achieve the effect of tensioning the servo motor stator, and the extrusion assembly is arranged at the other end of the mandrel. According to the utility model, the principle of self-tensioning compensation and elastic deformation is adopted, the target of processing the motor seam allowance by taking the stator punching sheet as a reference is realized, the high concentricity of the motor stator seam allowance, the main shaft and the motor stator is ensured under the matching of the positioning assembly and the extrusion assembly, the concentricity of the motor stator and the matching end cover is improved, and the motor performance is improved.

The invention relates to the technical field of dental implant, in particular to a zygomatic implant assembly which comprises an implant body, a nail holder, a zero-degree abutment, an abutment healing cap, an angle abutment, a temporary inner crown and a covering cap. The end face of the neck of the implant body is arranged to be the inclined end face, a two-stage connecting column limiting structure of the conical surface connecting column and the hexagonal connecting column is arranged on the inclined end face, Morse taper fit between assemblies is achieved through the conical surface connecting column, axial clamping and fixing are formed, and rotating and fixing between the assemblies are achieved through the hexagonal connecting column; when the planting body is matched with each component, even if the planting body is not fixed through screws, temporary connection can be established through tight attachment of conical surfaces, and planting implementation operation is simplified; meanwhile, the assembling and positioning precision of all the assemblies can be improved through taper fit, all the assemblies are not prone to deviation, the cooperative adaptability of all the assemblies is improved, meanwhile, the overall structural stability of the zygomatic implant is improved, and the service life of the zygomatic implant is prolonged.

The utility model relates to the technical field of medical instruments, in particular to a quick-change interface tool under a navigation system, which comprises an operating handle, one end of the operating handle is provided with a quick-connection insertion rod, the outer wall of the operating handle is provided with a navigation interface, the outer wall of the navigation interface is respectively provided with a longitudinal Morse taper hole and a transverse Morse taper hole, and the longitudinal Morse taper hole and the transverse Morse taper hole are communicated with the quick-connection insertion rod. According to the quick-change surgical tool, the quick-change surgical tool with functional modules such as mounting, knocking and grinding can be flexibly inserted and pulled through the quick-connection inserting rod, one end of the button block is inserted into the transverse Morse taper hole to be fixed, and when dismounting is needed, only the button block needs to be pressed, so that the spring is compressed at one end of the button block to displace, and the quick-change surgical tool is dismounted. Meanwhile, the other end of the button block is warped up, then the button block and the transverse Morse taper hole are disconnected, the switching rod body can be flexibly replaced and detached, only the button block needs to be loosened, the compressed spring stretches out, the spring pushes the button block to reset and clamp, installation is more convenient, and locking is firm.

The machining device of the step drill for the composite materials comprises a step drill positioning installation seat and a step drill clamping mechanism, the step drill positioning installation seat comprises a Morse taper shank, a left side plate, a right side plate and a bottom plate, a U-shaped groove is formed in the top of the bottom plate, a positioning round pin is arranged in the U-shaped groove, and the positioning round pin is connected with the left side plate and the right side plate. A center positioning hole is formed in a drill handle of the step drill, the positioning round pin is matched with the center positioning hole, the step drill clamping mechanism comprises a left sliding plate and a right sliding plate, the left sliding plate and the right sliding plate are arranged in the U-shaped groove and are in sliding fit with the U-shaped groove, a left groove is formed in the left sliding plate, a right groove is formed in the right sliding plate, the left groove and the right groove are vertically and oppositely arranged, and the left sliding plate and the right sliding plate are arranged in a sliding mode. At least one left locking bolt is installed on the left side plate, the end of the left locking bolt abuts against the left sliding plate, at least one right locking bolt is installed on the right side plate, and the end of the right locking bolt abuts against the right sliding plate. The stepped drill machining device can machine stepped drills of various sizes, and production cost is reduced.

A knee replacement system, comprises: a tibial liner; a tibial tray with an upper surface and a lower surface, the lower surface comprising an external frustrum surface, wherein the upper surface of the tibial tray comprises a locking mechanism for engaging with the tibial liner; a coupling device, including a proximal morse taper located at an upper end that defines an internal frustrum space that engages with the external frustrum surface of the lower surface of the tibial tray, a morse taper wall that defines an external frustrum surface, and a distal end with a recess adapted to receive a fastener; a metaphyseal cone including an internal wall that defines an internal frustrum cavity for engaging with the external frustrum surface of the coupling device; and a tibial stem including a threaded end fastened to the distal end of the coupling device.

The application discloses a special fixture for turning of a heterogeneous rotary body thin-wall part and a precision machining method, relates to the technical field of special fixtures for turning of rotary bodies, and comprises a conical two-stage telescopic servo hydraulic system, an inner supporting module and an outer clamping module. The conical two-stage telescopic servo hydraulic system is of Morse taper structure, is connected with a machine tool through a left end pull rod, is internally provided with a first-stage chamber and a second-stage chamber, and is provided with an inner cylinder and a piston rod which are respectively installed in sliding fashions along an axial direction. The inner supporting module comprises an inner wall supporting mechanism and a selectable rib plate supporting mechanism. The special fixture for turning of the heterogeneous rotary body thin-wall part is compact in structure, can adopt outer clamping, inner supporting and rib plate limiting to realize multifunctional positioning and clamping of the thin-wall part, is convenient to mount and dismount, is stable in clamping, and is high in clamping efficiency. The precision machining method improves the machining precision and surface quality of the thin-wall part, effectively controls clamping and machining deformation, reduces product rejection rate, improves machining efficiency, and reduces machining cost.

The utility model relates to a compound tool, in particular to an efficient compound tool for cutting machining of a sleeve lathe. Comprising a cutter body, a turning hole is formed in the end face of one side of the cutter body, and a Morse taper shank is arranged on the end face of the other side. An outer circle turning chip groove and an outer circle turning PCD blade located in the outer circle turning chip groove are formed in the end face, close to one side of the trepanning hole, of the cutter body; a transmission pin shaft is rotationally installed on the cutter body in the axial direction, the two ends of the transmission pin shaft penetrate through the end faces of the two sides of the cutter body respectively, a cut-off cutter body is arranged on the end face of the side, close to the sleeving hole, of the transmission pin shaft, a driving connecting rod is arranged on the end face of the side, close to the Morse taper shank, of the transmission pin shaft, and the driving connecting rod is connected with a hydraulic connecting rod of a machine tool. A positioning piece is arranged between the cut-off tool body and the tool body, and a cut-off edge is arranged on one side of the cut-off tool body close to the center shaft of the trepanning hole. Workpieces can be machined without tool changing operation in the machining process, the machining time can be effectively shortened, and the machining efficiency is improved.

The invention discloses a permanent magnet motor rotor magnetic steel positioning and assembling device and method, and the device comprises a servo rotary table which is disposed at the center of a pedestal, and the table surface is provided with a Morse taper hole which is used for cooperating with the shaft end of a rotor, and achieves the high-precision coaxial positioning. The rotor locking ring is matched with a wedge-shaped pressing block driven by an air cylinder and used for pressing and fixing the magnetic steel in the radial direction. The linear module drives the clamping pincers to move along the linear lead screw, the magnetic steel is pushed into a rotor groove, and a permanent magnet adsorption strip is arranged in the clamping pincers to prevent the magnetic steel from deviating; the laser sensor forms a reference ring in a rotor groove through a reflector, and is used for limiting the circumferential and radial positions of the magnetic steel. A pressure sensor is arranged between the clamping pliers and the linear module so as to monitor the insertion force of the magnetic steel; through combination of optical reference, force control pushing and pneumatic locking, rapid and high-precision assembling of magnetic steel is achieved, and the magnetic steel assembling device has the advantages of being compact in structure, reliable in positioning and convenient to remodel.