613results about "Tailstocks/centres" patented technology

The invention relates to the technical field of lathe tail seats, in particular to a supporting tail seat for a lathe, which comprises a sliding seat, a clamping chuck, a supporting seat, a supporting seat and a driving mechanism, wherein the sliding seat is arranged on the lathe in a sliding manner and is close to a workpiece; the tailstock body is arranged on the sliding seat; the tailstock sleeve is arranged on the tailstock body and connected with a tailstock mandrel used for abutting against a workpiece in a matched mode. The sliding mechanism is arranged on the lathe, is connected with the sliding seat and is used for driving the sliding seat to slide; and the supporting mechanism comprises a first supporting frame rotationally arranged on the sliding base, a rotating piece arranged on the first supporting frame and an adjusting assembly arranged on the sliding base and used for driving the first supporting frame to rotate, and the rotating piece is used for supporting the side wall of the workpiece. The method has the effect of reducing the influence on the machining precision of the workpiece.

The invention discloses a CNC machine tool with an anti-jamming servo tailstock, and relates to the technical field of machine tool equipment.The CNC machine tool comprises a workbench, a machine tool body is arranged at the upper end of the workbench, a spindle box is arranged at the upper end of the machine tool body, a chuck is arranged on one side of the spindle box, a fixing plate is arranged in the machine tool body, and a first servo motor is arranged on one side of the machine tool body; the output end of the first servo motor penetrates through the lathe bed and is provided with a lead screw, two supporting guide rods are symmetrically arranged between the fixing plate and the inner surface of one side of the lathe bed, a moving block is arranged on the outer surface of the lead screw, a tailstock sliding saddle is arranged at the upper end of the moving block, and a mounting table is arranged at the upper end of the tailstock sliding saddle. According to the CNC machine tool with the anti-jamming servo tailstock, the rear center can be stably driven to transversely move, impurities on the surfaces of the lead screw and the supporting guide rod can be efficiently cleaned and automatically lubricated during use, the jamming condition is prevented, and meanwhile, the center base body and the rear center can be conveniently disassembled, assembled and replaced.

The invention discloses a planetary roller screw thread roller tooth part and thread combined grinding device and method, a Z-axis moving mechanism is movably mounted at the front part of a lathe bed, the Z-axis moving mechanism comprises a headstock and a tailstock, and a workpiece is mounted between the headstock and the tailstock in a propping manner; an X-axis moving mechanism is movably installed behind the machine body and connected with a Y-axis moving mechanism through a stand column. The Y-axis moving mechanism is movably connected with the A-axis rotating mechanism, and the A-axis rotating mechanism can rotate around the X axis; and grinding heads which are staggered in the upper, lower, left and right directions are sequentially integrated on the A-axis rotating mechanism. According to the device, the tooth part helical angle and the thread lead angle of the tooth part grinding head and the thread grinding head can be changed respectively, so that the device is more reasonable. The tailstock is provided with an automatic jacking device to jack the workpiece, and automatic batch machining of parts is facilitated. And more importantly, the switching of grinding functions is realized through a rotary mechanism, the change of a tooth helical angle and a lead angle during part machining is also realized, and the device is high in integration degree and wide in application range.

The invention relates to the field of machine tools, in particular to a built-in oil cylinder integrated tailstock with double-movement and double-adjustment functions, which comprises a tailstock body and a tailstock body driving mechanism, the tailstock body driving mechanism is used for driving the tailstock body to slide on a machine tool, a center is arranged on the tailstock body in a sliding manner, and the center is arranged opposite to a main shaft of the machine tool. An oil cylinder assembly is arranged in the tailstock body and used for driving the center to slide, and the sliding direction of the center is consistent with the sliding direction of the tailstock body. The problems that an existing machine tool is limited in adjusting range and large in size can be solved.

The invention provides multichannel spinning and turning integrated equipment for a cylindrical part of a carrier rocket and a machining method. The multichannel spinning and turning integrated equipment comprises a lathe bed, a main spindle box, a closing-in spindle box, a spinning roller frame, a tail top, a heating system, a control system and a hydraulic system. The main spindle box, the closing-in spindle box, the spinning roller frame and the tail top are installed on the lathe bed. The main spindle box is connected with the closing-in spindle box and drives the closing-in spindle box to work, a cylindrical part blank is clamped between the closing-in spindle box and the tail top, the spinning roller frames are located on the two sides of the cylindrical part blank, and the heating system is installed on the spinning roller frames; the control system is connected with the main spindle box, the closing-in spindle box, the spinning roller frame, the heating system and the hydraulic system. The hydraulic system is connected with the main spindle box, the closing-in spindle box, the spinning roller frame and the tail top. Through cooperation of the main spindle box, the closing-in spindle box, the spinning roller frame, the tail top and the like, the in-situ machining function combining forced spinning machining, closing-in machining and turning machining of cylindrical parts, conical parts and curved-bus-shaped parts of the carrier rocket is achieved.

The invention relates to a multi-tool-position metal cutting numerical control lathe which comprises a lathe body, a main shaft, an annular piece, a tool clamping mechanism and a feeding mechanism. The main shaft is rotatably mounted on the lathe body; the annular piece and the main shaft are coaxially arranged; the multiple tool clamping mechanisms are arranged in the circumferential direction of the annular part at intervals. Each tool clamping mechanism comprises a sliding base, a clamping base, a clamping plate and a limiting driving assembly. The sliding seat is mounted on the annular piece in a sliding manner along the radial direction of the annular piece; the clamping seat is rotatably mounted on the sliding seat; the multiple clamping plates are installed on the clamping base in a sliding mode, and the multiple clamping plates are arranged in a circular array mode with the axis of the clamping base as the circle center. The limiting driving assembly can drive the clamping plate to move so as to clamp the tool, and the limiting driving assembly can further limit rotation of the clamping base. Therefore, the cutters can be clamped, the angles of the cutters can be adjusted, and then the CNC system controls the feeding mechanism to drive the cutters to cut workpieces at the same time.

The invention relates to the technical field of eccentric shaft machining lathes, in particular to an eccentric shaft machining lathe with an eccentric center structure, which comprises a lathe main body, a fixed frame is fixedly connected to one side of the lathe main body, a movable frame is arranged on the fixed frame in a sliding fit manner, and a rotating seat is rotatably connected to the movable frame; a transmission mechanism is rotationally connected to the rotating seat, a stabilizing ring frame is rotationally connected to the rotating seat, a follow-up rotating ring is rotationally connected to the stabilizing ring frame, an eccentric block center mechanism is fixedly connected to the follow-up rotating ring, and an eccentric shaft is clamped and fixed to a three-jaw chuck on the lathe body; the eccentric block center mechanism is arranged on the follow-up rotating ring, the two angle-adjustable center plates abut against the fan-shaped eccentric block on the eccentric shaft, when the eccentric shaft rotates for machining, the fan-shaped eccentric block on the eccentric shaft is more stably and accurately supported, vibration, unbalance and deformation are reduced, and the machining precision and quality are improved.

The utility model discloses center-height-adjustable car jacking equipment for motor machining, and belongs to the technical field of machining machinery. The equipment comprises a lathe body, a lathe spindle is arranged at one end of the lathe body, a lathe tailstock is arranged at the other end of the lathe body, the lathe spindle is provided with a left center, the lathe tailstock is provided with a right center, the left center and the right center are coaxially arranged, and a motor to be turned is arranged between the left center and the right center in a jacking mode. The lathe body is provided with a lifting seat capable of supporting a motor to be turned, the lifting seat is provided with a lifting assembly for driving the lifting seat to ascend and descend, and the motor to be turned is axially centered between the left tip and the right tip through ascending and descending. The utility model has the advantage that the centering top-mounting of motors to be turned with different sizes is convenient.

The invention relates to the technical field of machine tool clamps, in particular to a high-precision dumbbell-shaped slender connecting rod turning clamp which comprises a fixed assembly, a sliding assembly, a contraction assembly and a top clamping assembly. The fixing assembly is installed at the right end of the machined part. The sliding assembly is slidably installed on the machined part. The contraction assembly is installed in the fixing assembly. The jacking and clamping assembly comprises a jacking and pressing component and a supporting component. The jacking and pressing component is arranged at the left end of the machined part. The supporting component is arranged at the right end of the jacking component; the fixing assembly is arranged to fix one end of a machined part, the sliding assembly moves along with the cutter at the same time, on one hand, the shrinkage assembly is extruded for cutting and cooling, on the other hand, the jacking and clamping assembly is driven to support a cut part, and the problem that a dumbbell-shaped long and thin connecting rod is not supported and fixed is solved. And the slender connecting rod is bent and deformed due to the simultaneous action of cutting force, gravity and centrifugal force during rotation during cutting.

A horizontal turning and milling combined machining center comprises an inclined lathe bed, a first guide rail and a second guide rail are arranged on the inclined face of the inclined lathe bed in the Z-axis direction, and the first guide rail is located above the second guide rail. A turning and milling cutter tower assembly is connected to the first guide rail in a sliding mode, and a tailstock unit is connected to the second guide rail in a sliding mode. A main shaft unit is further fixed to the inclined lathe bed, and the main shaft unit is located at the end of the second guide rail and is opposite to the tailstock unit. An automatic tool changing system is arranged behind the lathe bed; the main shaft unit is a heavy-load main shaft unit which is convenient to upgrade and reconstruct, the tailstock unit is a tailstock unit for accurately controlling the moving position of the numerical control machine tool, and the numerical control machine tool is used for overcoming the defects in the prior art.

This machine tool comprises: a first workpiece main spindle device that is fixed to a bed and that imparts rotation to a workpiece gripped by a first main spindle chuck; a second workpiece main spindle device that is assembled so as to be capable of moving in a direction parallel to the main spindle with respect to the bed and that imparts rotation to the workpiece being gripped by a second main spindle chuck coaxial with the first main spindle chuck; a turret device that is assembled so as to be capable of moving in a direction parallel to the main spindle with respect to the bed, and which is configured such that a turret tool post to which a tool used for machining the workpiece gripped by the first main spindle chuck and the second main spindle chuck is attached moves in a direction parallel to or orthogonal to a main spindle of each of the first workpiece main spindle device and the second workpiece main spindle device; and a tail stock provided with a retraction mechanism for displacing a freely rotatable center rod which is equipped with a center at both ends and which is brought into contact with the center of rotation of the workpiece from a direction facing each of the first main spindle chuck and the second main spindle chuck, to a position away from the center of rotation.

To perform full processing of a workpiece by resolving problems such as high costs and large installation space.SOLUTION: A workpiece W is gripped by a workpiece gripping device 16 such that its axis is oriented in the second axial direction that is orthogonal to the axial direction (first axial direction) of a workpiece spindle 3. By relatively moving a tool spindle 2 and the workpiece gripping device 16, workpiece end processing such as center hole processing of the workpiece W is performed. Subsequently, a workpiece hand 13 is attached to the tool spindle 2. By relatively moving the tool spindle 2 and the workpiece gripping device 16 in a state where the axis of the workpiece W is oriented in the second axial direction, the workpiece W is delivered from the workpiece gripping device 16 to the workpiece hand 13. Next, the tool spindle 2 is swiveled such that the axis of the workpiece W is oriented in the first axial direction, and the workpiece W is conveyed to a position where it can be delivered from the tool spindle 2 to the workpiece spindle 3. Finally, the workpiece W is gripped by the workpiece spindle 3, and processing such as cutting processing is performed.SELECTED DRAWING: Figure 2

The utility model discloses a hydraulic end face driving clamp for a shaft. The hydraulic end face driving clamp comprises a driving pin seat, a support and a base which are sequentially connected in the axial direction. A lower tip is embedded in the axis of the driving pin seat, and a driving pin penetrates through the driving pin seat and is movably arranged; a floating assembly, a lower push rod and a lower pull rod are sequentially arranged below the driving pin in an ejecting mode and axially penetrate through the support and the base. According to the hydraulic end face driving clamp for the shaft, the upper portion and the lower portion of the clamp are positioned through center holes, a lower tip is changed into a fixed tip, the end face is driven through the floating assembly after positioning, the driving pin is made to be in a floating free movement mode and can float along with jumping of the end of a part, and it is guaranteed that the driving pin is evenly stressed.

Clamping device (S) for a workpiece (W), with a) a sleeve (2) for exerting a clamping force on the workpiece (W), which is displaceably guided and supported by a spring element (34), b) a self-locking feed device (3) for the spindle sleeve (2), c) an electric motor (6) for driving the feed device (3), d) an electrical measuring device (42) for continuously recording the actual value of the compression travel (344) of the spring element (34), and e) a control system (7) which e1) determines a first actual value of the clamping force of the sleeve (2) from the current of the motor (6) and stops the motor (6) when a target value of the clamping force is reached, and e2) determines a second actual value of the clamping force of the sleeve (2) from the actual value of the compression travel (344) achieved in this process and switches off the motor (6) if the value matches the target value and / or the first actual value of the clamping force of the sleeve (2).

The invention provides a clamping mechanism and method for driving a shaft gear to rotate for machining. A clamping ring is mounted on a top positioning sleeve of a clamp seat in a clearance fit manner; one side of the clamping ring is fixedly provided with a single-acting oil cylinder in the radial direction, the single-acting oil cylinder penetrates through a U-shaped groove formed in the top positioning sleeve, the other side of the clamping ring is fixedly provided with guide plates in the radial direction, and the guide plates penetrate through guide grooves formed in the top positioning sleeve; spring jacking mechanisms are mounted in pairs in the radial direction of the clamping ring and located on the two sides of the guide plate, and the spring jacking mechanisms are matched with the outer circle of the top positioning sleeve; a positioning disc for axially limiting the clamping ring is fixedly mounted at the top of the clamp seat; the upper tip and the lower tip are used for tightly jacking the two axial ends of the shaft gear. The radial clamping position can be adjusted according to the actual condition of the shaft gear clamping outer circle, the coaxial requirement for the clamped shaft gear outer circle relative to center holes in the two ends does not exist, and over-positioning cannot be generated in shaft gear clamping.

The utility model relates to the technical field of pipe part machining, in particular to a flexible switching tool capable of widening the center supporting range of a machine tool and reducing rotating and shaking of a pipe fitting, and the whole flexible switching tool is of a tubular structure. The outer surface of the flexible supporting end is subjected to sand blasting treatment so as to improve friction force and strengthen matching with the inner pipe wall of a to-be-machined pipe fitting to achieve connecting and supporting of the to-be-machined pipe fitting, and the other end of the tool is provided with a tip acting end which is of a conical structure and matched with a machine tool tip. The tool is provided with the tip acting end and the flexible supporting end, the tip acting end is connected with the machine tool tip, the size range of pipe fittings capable of being supported by the machine tool tip is expanded, the small-size tip can support the pipe fittings with the larger size diameter with the help of the tool, the situation that the machine tool tip with the larger size is purchased and customized is avoided, and the production cost is reduced. And the use cost is reduced. Meanwhile, the flexible supporting end of the tool is provided with flexible supporting teeth, and the supporting teeth play a role in elastically supporting and fixing the to-be-machined pipe fitting.

The utility model discloses a multifunctional machine tool composite tailstock which comprises a machine tool tailstock body, a mounting base, an adjusting mechanism and a limiting mechanism, the adjusting mechanism is used for driving the machine tool tailstock body to move in the vertical direction, and the limiting mechanism is used for downwards extruding and limiting the mounting base. The extrusion block is driven to move horizontally by rotating the adjusting screw rod, so that the upper surface of the extrusion block and the lower surface of the fixing block are extruded, the fixing block moves vertically and upwards, the fixing block drives the mounting seat and the machine tool tailstock main body to move vertically and upwards, and the mounting seat drives the limiting rod to slide on the base. The position of the machine tool tailstock body in the vertical direction is adjusted, then the threaded sleeve is rotated to move on the fixing rod, the bottom end of the threaded sleeve extrudes the upper surface of the connecting block, the connecting block, the mounting base and the machine tool tailstock body are limited, and the stability of the machine tool tailstock body is guaranteed; and the drilling position of the machine tool tailstock main body can be conveniently adjusted.

The present invention relates to the technical field of mechanical manufacturing, and disclosed are a centering fixture, machining tool and machining method for a hollow shaft. The centering fixture comprises a center rod; truncated-conical holes for matching tool centers are formed at two ends of the center rod; a first end of the center rod is provided with a truncated-conical boss for abutting against one end of the hollow shaft; a truncated-conical plug for abutting against the other end of the hollow shaft is movably fitted over a second end of the center rod; the truncated-conical plug and the center rod rotate synchronously; and a power pin for fitting a transmission rod of the tool centers is provided on the truncated-conical boss. The centering fixture for a hollow shaft provided by the present invention uses the friction force and clamping force between tool centers and a center rod of a centering fixture, and also increases a mechanical transmission mode by means of fitting of a power pin provided on the centering fixture and a transmission rod of the tool centers, thereby avoiding the problem of rotation delay of the hollow shaft during machining, and improving the finish machining effect of the hollow shaft.

The present invention relates to the technical field of turning machine tools, and discloses a valve core turning device and a valve core production process, comprising a machine tool, wherein the machine tool is provided with a turning mechanism and a driving mechanism, wherein a driving motor and a tailstock are provided inside the machine tool, a three-jaw chuck is fixedly connected to the output shaft of the driving motor, and a cutting mechanism is provided on the driving motor, wherein the cutting mechanism comprises a cutter, a pushing assembly, and an electric push rod, wherein the cutter is used to cut a workpiece, the pushing assembly is used to drive the cutter to cut the workpiece after turning, and the electric push rod is used to adjust the cutting position of the cutter; the machine tool is also provided with a locking mechanism. The present invention realizes the effect of being able to turn and shape the stop valve core, and after turning is completed, it can also automatically cut the turned workpiece, and can also adjust the cutting position of the cutter, and can also achieve the effect of automatic top fixing.

The invention belongs to the technical field of eccentric shaft machining, and particularly discloses an eccentric shaft multi-procedure one-time clamping machining technology and device which comprises a lathe bed body, a switchable positioning unit, a modular tool magazine, a precision detection module and a control system, and the switchable positioning unit, the modular tool magazine, the precision detection module and the control system are arranged on the lathe bed body. The switchable positioning unit comprises a three-jaw centering assembly, a manual fine adjustment chuck, an automatic compensation positioning mechanism and a tailstock center, the three-jaw centering assembly is in sliding connection with the top position of the lathe bed body, and the manual fine adjustment chuck and the automatic compensation positioning mechanism are both connected with the three-jaw centering assembly through a switching gear set; the modularized tool magazine is located on one side of the lathe bed body. According to the multi-procedure one-time clamping machining technology and device for the eccentric shaft, one-time clamping can meet two precision requirements, the equipment specialization problem is solved, the equipment input cost is reduced, the equipment utilization rate is increased, and meanwhile the machining precision and efficiency are guaranteed.

The invention relates to equipment and a method for machining an internal thread with a large length-diameter ratio by adopting a whirlwind thread milling cutter. The technical problem that machining efficiency and precision are affected due to the fact that the length-diameter ratio of an existing workpiece is large is solved. Comprising a stand column vertically arranged on a lathe bed, a horizontal sliding seat is vertically and movably arranged on one side of the stand column through a sliding seat lifting assembly, a spindle device is horizontally and movably arranged on one side of the horizontal sliding seat through a spindle translation mechanism, and the spindle device is provided with a clamping assembly used for clamping cylindrical workpieces which are vertically distributed; a whirlwind thread milling cutter is arranged above the main shaft device, the whirlwind thread milling cutter is arranged on an electric main shaft assembly, and a main shaft tip assembly is arranged below the main shaft device through a tip lifting assembly. The device has the advantages that the radial distance between a workpiece and the milling cutter is adjusted through movement linkage of the sliding seat lifting assembly, the main shaft translation mechanism and the tip lifting assembly, it is ensured that the milling cutter can accurately cut into the complex position on the inner side of the workpiece, meanwhile, large-length-diameter-ratio internal threads can be machined, and limitation of traditional machining is avoided.

The utility model discloses a disc tailstock of a numerical control machine tool. The disc tailstock comprises a shell, a rotating shaft, a bearing, a rotating disc and a brake mechanism. The shell comprises a shell body, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are assembled on two opposite end sides of the shell body respectively. The rotating shaft is supported in the shell main body through a bearing; one tail end of the rotating shaft extends out of the front end cover and then is fixedly connected with the turntable; an abutting part is convexly arranged on the inner side wall of the shell main body towards the central axis of the rotating shaft, and a limiting flange is convexly arranged on the rotating shaft towards the abutting part; the brake mechanism comprises a brake pad and a brake linkage device used for braking the brake pad towards the abutting portion, the brake pad is arranged on the rotating shaft in a sleeving mode, the inner circle end of the brake pad is fixed to the limiting flange in an abutting mode, a first avoiding gap is formed between the outer circle end of the brake pad and the abutting portion, and the brake linkage device is fixed to the inner side face of the rear end cover. The specific structure and the assembly structure of the brake mechanism are optimized, so that the brake mechanism is reliable in structure and convenient to replace and maintain.

The utility model relates to a multifunctional seat body structure for an adjustable lathe tailstock, which comprises a base, a tailstock body is arranged at the top of the base, an ejector pin is arranged in the tailstock body, and an adjusting mechanism is arranged in the base. The adjusting mechanism comprises a first motor, a driving gear, a driven gear, an adjusting screw rod, a screw sleeve, a sliding block, a first telescopic cylinder and a second telescopic cylinder. According to the multifunctional base body structure for the adjustable lathe tailstock, firstly, the height of the tailstock body is determined according to the placement position of a part, a controller drives a first motor to be started, at the moment, a driving gear is meshed with a driven gear, so that an adjusting screw rod at the top is driven to synchronously rotate, and a thread sleeve can drive the tailstock body to synchronously ascend and descend; and then the controller drives a second motor to start, at the moment, the second motor drives a lead screw to rotate, a limiting block slides outside the lead screw, the ejector pin is driven to move inside the sleeve, and the length of the ejector pin is conveniently adjusted.

The invention discloses a quick-change turning clamping mechanism for a special-shaped piston rod with a lug ring, relates to the technical field of clamping tools, and aims to solve the problems that in the prior art, a rod head of the special-shaped integral piston rod with the lug ring cannot be directly clamped through a three-jaw self-centering chuck and needs to be clamped through a four-jaw chuck, precision is poor, efficiency is low and the like. One side of the base body is connected with three-jaw self-centering chuck equipment, and a clamping assembly is arranged on the other side of the base body and used for clamping the special-shaped piston rod with the lug ring. A replaceable tip is arranged in the middle of the base body, a center hole is formed in the middle of a lug ring of the special-shaped piston rod with the lug ring, and the replaceable tip can be embedded in the center hole so that the central axis of the three-jaw self-centering chuck equipment and the central axis of the special-shaped piston rod with the lug ring can be located on the same straight line. The special-shaped piston rod with the lug ring can be directly clamped by existing standard three-jaw self-centering chuck equipment, the applicability is high, and the production efficiency is improved.

The invention belongs to the technical field of metal material cold machining strengthening, and particularly relates to an omni-directional powerful numerical control rolling machine tool for axle strengthening, which comprises a machine tool body, and a spindle box, a radial feeding mechanism and a tailstock which are sequentially arranged on the machine tool body, opposite rotary tables are arranged above the radial feeding mechanism, and rolling devices are arranged on the rotary tables; the rolling device is internally provided with two rolling heads arranged back to back, and the rolling heads are switched through a rotary table. The invention further discloses an axle strengthening machining method which comprises six steps that three-dimensional space accurate positioning is achieved through the axial and radial numerical control seven-axis linkage interpolation technology, and the rolling device is pushed through the hydraulic driving system to apply high-strength acting force; the rotary table is adopted to drive the rolling heads to quickly switch the rolling heads for different shaft sections, so that the efficiency is improved; the device has the advantages of high automation, large rolling force, high reliability and the like, the roughness of the workpiece surface is remarkably reduced, the surface hardness is improved, the axle surface layer is strengthened, the wear resistance is improved, and the service life is prolonged.

The invention discloses a multi-station turning device for part production, and particularly relates to the technical field of turning machining, the multi-station turning device for part production comprises a numerical control lathe body, an electric tailstock is slidably connected in the numerical control lathe body, a first mounting frame is arranged in the numerical control lathe body, and a second mounting frame is arranged on one side of the first mounting frame; according to the numerical control lathe, multiple connecting columns drive clamping plates to be closed to clamp and fix the two ends of the long-axis part through springs in multiple mounting caps, so that the two ends of the long-axis part can be clamped and fixed at the same time, the stability of the device during placement is kept, a second driving motor can be started through a PLC of the numerical control lathe body, and the machining precision is improved. Furthermore, the two second moving seats are far away from each other in opposite directions under the thread transmission action of the two-way screw rod, and then the use distance between the two mounting frames can be adjusted, so that the mounting frames can adapt to long-axis parts with lengths.

The utility model discloses a supporting tailstock and a five-axis cradle rotary table. The supporting tail seat comprises a mounting plate, a seat body fixed on the mounting plate, a core shaft rotationally connected in the seat body through a bearing, and a turntable fixed at the tail end of the core shaft; the brake device is characterized by further comprising a locking sleeve and a brake ring fixed to the seat body through the locking sleeve, the brake ring is arranged on the outer side of the rotary disc in a sleeving mode and comprises a brake pad arranged close to the outer side of the rotary disc, one end of the locking sleeve abuts against the brake pad through a fourth sealing ring, and the other end of the locking sleeve abuts against the brake pad through a fifth sealing ring. The locking sleeve is provided with a pressure cavity right opposite to the brake pad, and the pressure cavity and the rotary disc are located on the two opposite sides of the brake pad respectively. The locking sleeve and the brake ring are arranged on the outer side face of the rotary disc in a sleeving mode, the pressure cavity is formed in the end face, abutting against the brake pad of the brake ring, of the locking sleeve, the rotary disc is braked by changing the pressure in the pressure cavity and being in linkage with the brake pad, and the brake structure is reliable in work, simple in overall structure, easy to assemble and convenient to maintain in the later period.

The invention discloses a high-rigidity ejector pin tailstock for blade machining, and relates to the technical field of ejector pin tails.The high-rigidity ejector pin tailstock comprises an operation table, an adjusting block is installed at the upper end of the operation table in a sliding mode, and meanwhile an ejector pin is installed on one side of the adjusting block in a sliding mode; according to the high-rigidity ejector pin tailstock for blade machining, when the adjusting plate moves, the adjusting plate is matched with the butt joint block to synchronously drive the arc-shaped plates to move, the multiple sets of arc-shaped plates surround to form a cylindrical shape, and the rubber ring is limited through the groove holes formed in the arc-shaped plates, so that when the arc-shaped plates move, the rubber ring is stretched, and the blade machining precision is improved. And meanwhile, in the stretching process, a gap between every two adjacent arc-shaped plates is filled with a rubber ring, and it is guaranteed that the whole blade is kept stable when the ends of the blade are centered.

The invention discloses a composite tailstock of a machine tool, and relates to the technical field of tailstock of machine tools, the composite tailstock comprises a tailstock body, a screw rod is rotatably connected in the tailstock body, a sleeve in threaded connection with the screw rod is slidably connected in the tailstock body, the composite tailstock further comprises a fastening mechanism, and the fastening mechanism comprises a connecting cylinder rotatably connected in the sleeve; a center is inserted into the connecting cylinder, a limiting assembly is arranged in the sleeve and comprises an extrusion ring connected to the outer portion of the connecting cylinder in a sleeving mode, a reset spring is arranged between the extrusion ring and the inner wall of the sleeve, a clamping block is rotationally connected to the connecting cylinder, a torsional spring is arranged between the clamping block and the connecting cylinder, and the periphery of the center is clamped and fastened through the clamping block and a buffer pad. The center inserted into the connecting cylinder is prevented from inclining when being vibrated, the machining precision of a workpiece is ensured, in addition, the clamping fastening degree of the center can be adjusted through the internal pressure of the oil storage box, and the internal pressure of the oil storage box can be increased along with the acceleration of the rotating speed of the center and the workpiece.