364results about "Tailstocks/centres" patented technology

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 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 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 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 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 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 relates to the technical field of numerical control machine tools, and particularly discloses a diameter-linked rigidity-adjustable hydraulic tailstock structure and a control system.The diameter-linked rigidity-adjustable hydraulic tailstock structure comprises a base and a tip arranged on the base; the diameter acquisition mechanism is fixedly arranged on the end part, facing one end of the workpiece, in the base, and the diameter acquisition mechanism is used for outputting linear driving power related to the diameter parameter of the workpiece according to the diameter of the workpiece; the linkage adjusting piece is in transmission connection with the diameter obtaining mechanism, and the linkage adjusting piece is arranged in an inner cavity of the base in a linear moving mode; the force adjusting mechanism is fixedly installed on the base, connected to the linkage adjusting piece and used for changing the pressure applying force on the tip according to the moving stroke of the linkage adjusting piece. The tailstock device solves the problem that the tailstock device generally lacks the adjusting capacity of real-time linkage with the workpiece size.

The invention discloses a top clamping tool clamp for machining a complete sphere, which comprises an alignment template, a cutter bar device and a tool sleeve, and the tool sleeve is divided into a front-end tool sleeve and a rear-end tool sleeve; the longitudinal spherical shape of the alignment template is asymmetrical in the front-back direction, a wide step is arranged on the surface of the hemisphere on the rear side, and a wide outer cylindrical surface machined through tool setting according to the wide step is matched with the first inner cylindrical surface in the front-end tool sleeve. The invention further discloses a machining method of the complete ball, and on a center lathe, the clamping and jacking tool clamp for machining the complete ball is utilized, and the machining method comprises the steps that the position of the alignment sample plate is determined; clamping the cylindrical blank; rough machining twice; adjusting the positions of a tailstock and a middle sliding plate; installing and adjusting the height position of the blade; two times of finish machining; and the two tip chucks are removed, and a workpiece of a finished product sphere is obtained. The invention belongs to the technical field of mechanical equipment manufacturing, and solves the problems that a clamp in the prior art is unreasonable in structure, and a center lathe is difficult to accurately machine a whole ball.

The invention belongs to the technical field of turning, and particularly relates to a turning device for motor shaft machining, which comprises a lathe body and a slide rail arranged on the lathe body, a splash-proof door is slidably arranged on the lathe body, a three-jaw chuck is rotatably arranged on the lathe body, a tool apron and a moving part are slidably arranged on the slide rail, and the moving part comprises a containing seat. An avoiding groove and a limiting groove are formed in the accommodating seat; according to the turning device for machining the motor shaft, when a solid motor shaft blank is machined, a conical structure composed of the sharp claws can be directly utilized to abut against a center hole of the motor shaft blank to achieve positioning, and when a hollow motor shaft blank is machined, inner supporting and fixing can be achieved only by driving the sharp claws to expand in the radial direction through an adjusting mechanism; the embedded seat of the limiting mechanism can be matched with the limiting groove of the containing seat to lock the position of the mounting column, when workpieces of the same model are machined, the second handle is pulled to enable the sharp claw to be separated from the workpieces after locking of the mounting column is removed, rapid unloading of the workpieces is achieved, and when a new workpiece is clamped again, only the mounting column needs to be reset, and the original positioning precision can be restored.

The application provides a special tool for a flat top center, which can guarantee the positioning accuracy and stability of the top center and ensure the machining accuracy of the blade. The tool comprises a top center shaft, which is installed in a top center seat, the top center seat is installed in a mounting cavity of a machine tool slide cylinder, and the top center seat and the top center shaft are connected by screws, the shape of the mounting cavity of the machine tool slide cylinder is matched with the shape of the top center seat; the top center shaft comprises a shaft body and a top head, the top surface of the top head is a flat surface, and the top surface of the top head is fixedly installed with a tooth surface pressing block; the shaft body comprises three cylindrical sections with decreasing radii from top to bottom, namely a first cylindrical section, a second cylindrical section and a third cylindrical section, the outer part of the joint between the third cylindrical section and the top center seat is successively sleeved with a thrust ball bearing and a needle bearing from top to bottom; the outer part of the joint between the second cylindrical section and the top center seat is successively sleeved with a pair of angular contact ball bearings from top to bottom, the upper end surface of the outer ring of the upper angular contact ball bearing is press-fitted with an end cover, the end cover is sleeved on the outer part of the first cylindrical section, and a first sealing ring is arranged at the joint between the end cover and the first cylindrical section.

The machine tool (10) according to the invention has a work spindle (20), a workpiece table (12) and a workpiece holding device (15), which is attachable to the workpiece table (12), for supporting workpieces (11) that are long and / or have a complex shape, wherein the workpiece holding device (15) has an interchangeable workpiece bearing unit (21) which can be used to hold or support the workpiece (11) at a particular point. The particular feature of the present invention is that the workpiece bearing unit (21) can be interchanged automatically by the work spindle (20).

A workpiece support (18) for supporting a workpiece (14), the workpiece support (18) comprising a workpiece support body (54) and a workpiece support element (20) associated with the workpiece support body (54) for engaging the workpiece (14) and a piezo electric actuator (32) being associated with the workpiece support body (54) for moving the workpiece support element (20) for supporting the workpiece (14). The workpiece support body (54) comprising one or more flexures (44) that enable a movable portion (42) of the workpiece support body (54) to move when acted on by the piezo electric actuator (32) and to move the workpiece support element (20). The workpiece support (18) can comprise two or more workpiece support bodies (54) and a piezo electric actuator (32) being associated with each workpiece support body (54) for moving the respective workpiece support elements (20).

This application discloses a fixing device for a double-ended stud bolt used in machine tools, relating to the technical field of machine tool fixtures. It includes a machine tool body, a chuck rotatably mounted on the machine tool body, an abutment member, and a tailstock slidably mounted on the machine tool body. The chuck is perpendicular to the sliding direction of the tailstock. The abutment member is rotatably mounted on the tailstock, with an abutment hole at one end away from the mounting rod, the center of which is at the same height as the center of the chuck. The chuck clamps one end of the double-ended stud bolt, and then the tailstock slides, causing the abutment member on the tailstock to abut against the other end of the double-ended stud bolt. One end of the double-ended stud bolt is held by the chuck, while the other end directly abuts against the abutment hole. This eliminates the need for pre-drilling and cutting off the drilled portion, simplifying the processing flow and improving production efficiency. Furthermore, it eliminates the need to reserve space for cutting off the drilled portion, saving production costs.

The utility model relates to the technical field of numerical control machine tools, and discloses a numerical control machine tool safety ejector rod mechanism which comprises a support and a supporting rod, the bottom of the support is slidably connected with a support through a guide rail, a sleeve is arranged at the top end of the support, and an electric push rod is fixedly installed on the inner wall of the top end of the support through a backup plate. A telescopic rod of the electric push rod is connected with the top of a sleeve through a connecting plate, a sealing assembly is arranged on one side of the sleeve, and the interior of the sleeve is rotationally connected with a supporting shaft through a bearing. The electric push rod drives the sleeve to drive the tip to horizontally move, the tip can limit one side of a workpiece and can be suitable for workpieces of different sizes, manual operation is not needed, manpower and time are saved, the guide rail can support and guide the sleeve through the support, and the stability of the sleeve can be kept; buffering can be provided between the center and the workpiece through the damping gas spring.

The invention provides a clamping device for thread spinner cooling roller body machining, and relates to the field of cooling roller body machining. The clamping device comprises an adaptive assembly which is used for being adaptive to clamping of a three-jaw chuck of the lathe. The clamping part comprises a moving part, a fixed part, an axial part, a radial part and a locking part, the axial part is used for providing clamping force in the axial direction, the radial part is used for providing clamping force in the radial direction, the fixed part is used for providing power for autorotation, the moving part is used for controlling the radial part and the axial part to move, and the locking part is used for locking the axial part and the radial part. And the locking part is used for locking the moving part and the fixed part into a whole. Through the arrangement of the adaptive assembly and the clamping component, the adaptive assembly provides a position for clamping of the three-jaw chuck of the lathe, so that the three-jaw chuck is prevented from being directly clamped on a workpiece, and the workpiece is prevented from being damaged; and through the arranged tail assembly, a mounting position can be provided for the clamping part, and the stability of the tail of the workpiece is guaranteed.

The invention belongs to the technical field of composite numerical control machine tools, and particularly relates to a ten-axis five-linkage intelligent composite numerical control machine tool which comprises a machine tool base, two workpiece tail bases are slidably connected to the upper portion of the machine tool base and symmetrically arranged in the length direction of the machine tool base, and a cutter sliding table is fixedly installed in the middle of the upper portion of the machine tool base. The cutter sliding table is used for bearing a cutter assembly; a cutter rotary table is rotationally connected to the upper portion of the cutter sliding table and can drive the cutter assembly to rotate, so that the machining track of the cutter coincides with the throat diameter plane of the workpiece. By means of the ten-axis five-linkage arrangement and the cooperation of the symmetrically-arranged workpiece head and tail frames and the middle cutter sliding table, precise machining of complex workpieces can be achieved, the machining precision of the workpieces is guaranteed, and the machining requirements of high-precision parts and complex-surface-roughness parts are met. The problems that small-modulus workpieces in the current market are poor in adaptability, and large-modulus multi-specification machining requirements cannot be met are solved.

The utility model relates to the technical field of machine tool equipment, in particular to a wedge surface locking mechanism which comprises a shell, a driving wedge block, a driven wedge block and an oil cylinder, a sliding way is arranged in the shell, a piston and an elastic piece are arranged in the oil cylinder, one end of the piston is connected with the driving wedge block, and the other end of the piston is connected with the elastic piece used for pressing. The driving wedge block is driven by the piston to transversely move in the sliding way, and the driven wedge block and the driving wedge block are matched to move up and down in the sliding way so as to abut against or loosen a moving part of a machine tool. The locking mechanism is low in manufacturing cost, simple in structure, suitable for moving assemblies on various machine tools, convenient to install and use, and more reliable and safer due to the fact that wedge face locking is adopted.

The present application belongs to the technical field of machine tool equipment, and in particular to a top pin structure of a vertical cradle five-axis turning and milling combined machine tool, comprising a machine tool, wherein the base of the machine tool is arranged in a U shape with the opening direction facing upwards. The structure, by arranging the top pin mechanism, significantly improves the accuracy and motion stability of the top pin pressure adjustment, the rolling contact design of the main and auxiliary balls greatly reduces the friction loss in the force transmission process, and the fine adjustment of the top pin pressure can be realized through the threaded transmission of the threaded rod, meeting the pressing needs of different material rods; the pre-compression structure of the spring provides stable pre-tightening force and realizes fast resetting of the top pin, avoiding jamming; the design of the guide sleeve and the hard alloy contact end limits the radial swing of the top pin, ensures the coaxiality of the top pin and the material rod, reduces the machining eccentricity error, and on the other hand, enhances the wear resistance of the top pin and prolongs the service life; the overall structure makes the top pin bear force evenly, effectively avoids the displacement of the material rod under pressure, and improves the workpiece size accuracy.

The utility model provides a multi-position type mechanical ejector pin device which comprises a base, a fixing frame is fixedly connected to the base, a rotating groove is formed in the end of the fixing frame, a rotating ring is rotationally connected in the rotating groove, a main ejector pin is fixedly connected to the outer end of the rotating ring, a ball is embedded in the end of the main ejector pin, and the ball is fixedly connected to the outer end of the main ejector pin. A restraining frame is fixedly connected to the side face of the fixing frame, a sliding groove is formed in one side of the restraining frame, and a plurality of lock holes are formed in the two sides of the sliding groove. The utility model has the advantages that: when in use, the main ejector pin is propped against the required position of a workpiece; when the workpiece rotates, the ball rotates in the main ejector pin, and the main ejector pin rotates on the fixing frame, so that double rotation protection is realized, and the workpiece can be prevented from being damaged and abraded by the rotating assembly. The auxiliary ejector pin can restrain the workpiece, when the workpiece inclines in the rotating process, the auxiliary ejector pin abuts against the workpiece to prevent the workpiece from continuously inclining, and the fixing effect of the ejector pin device can be improved.

The utility model discloses a floating type tailstock supporting mechanism, a multi-axis turntable and a machine tool, the floating type tailstock supporting mechanism is arranged at the tail part of a C-axis machine body, the floating type tailstock supporting mechanism comprises a tailstock body and a rotary supporting shaft, the rotary supporting shaft is connected with the C-axis machine body, and the C-axis machine body is connected with the C-axis machine body. The rotary supporting shaft is supported on the tailstock body through a self-aligning ball bearing. According to the technical scheme, the C-axis machine body adopts the floating type supporting tailstock supporting mechanism as a tail support, and the floating type supporting tailstock supporting mechanism adopts the self-aligning ball bearing, so that the floating type supporting tailstock supporting mechanism has the self-aligning angle capacity within a certain angle range, the tailstock floating effect is achieved, and the service life of the machine body is prolonged. The device is used for counteracting errors caused by assembling and machining precision of a C-axis machine body and the like, it can be guaranteed that deformation caused by assembling errors and external poor stress is avoided when the rotary table rotates, the influence caused by perpendicularity deviation is counteracted, and the reliability of product performance is guaranteed.

A tailstock assembly (60) for a grinding machine (10) comprises a base (96) and a table (98) which is mounted on the base (96) and is movable relative to the base (96). The table (98) supports a superstructure (114) that provides an interface (116) with a receptacle (120) for a bearing block (102) supporting a center (62, 106, 160, 170, 180, 190, 200, 210, 220, 230) for workpiece mounting. The center (62, 106, 160, 170, 180, 190, 200, 210, 220, 230) has a center axis (108). The interface (116) is offset laterally relative to the center axis (108). A grinding machine (10) has a machine frame (14) and a tailstock assembly (60) arranged on the machine frame (14). A method for changing centers on a grinding machine (10) utilizes such a tailstock assembly (60).

The utility model relates to the technical field of numerical control machine tool equipment, in particular to a lathe tailstock locking device which comprises an eccentric shaft arranged in a tailstock box body in a rotating structure mode, a locking groove is formed in the peripheral wall of the eccentric shaft, the locking groove is matched with a locking rod to lock the eccentric shaft, the locking rod is arranged in a locking hole in the tailstock box body in a sliding mode, and the locking rod is matched with the locking groove. The eccentric shaft can stretch into the lock hole, the eccentric step of the eccentric shaft is sleeved with a locking sleeve, the lower portion of the locking sleeve is provided with a connecting frame in a fixed structure mode, the lower portion of the connecting frame is provided with a pressing plate in a fixed structure mode, the pressing plate and the connecting frame are provided with two connecting points, the two connecting points are symmetrically arranged on the two sides of the locking sleeve, and the pressing plate is located on the lower portion of the tailstock box body. Through the structural design, two-point locking of the pressing plate can be completed through one eccentric shaft, finally, the pressing plate moves upwards to make contact with the lower surface of the tailstock hard rail, a worker can operate with one hand, the locking rod is only matched with one locking groove in a penetrating and inserting mode, the working efficiency is improved, and the operation process is simplified.