1043 results about "Tailstock" patented technology

The invention relates to the technical field of machine tool equipment, in particular to a numerical control grinding machine product quality real-time monitoring optimization method based on the Internet of Things. The method comprises the following steps: acquiring multi-node real-time operation data of the numerical control grinding machine; working state parameters of key components of the grinding machine are counted according to the multi-node real-time operation data; the product machining quality fluctuation trend is determined based on the multi-node real-time operation data and the working state parameters of the key components of the grinding machine; according to the product machining quality fluctuation trend, the cooperative change rule of the grinding machine tailstock jacking force is detected; and determining the geometric accuracy limitation trend of the workpiece according to the cooperative change rule of the jacking force of the tailstock of the grinding machine. According to the method, the control parameter adjustment behavior, the system response state and the quality detection result of the numerical control grinding machine are associated and integrated, and the tracking and effect evaluation of the key control behavior are realized by constructing a historical contrast system of the adjustment behavior and the response data.

The utility model relates to the technical field of cylindrical grinding machines, in particular to a cylindrical grinding machine with a grinding wheel easy to replace, which comprises a machine body, a workbench and a headstock, the workbench is arranged at the upper end of the machine body, the headstock is slidably connected to the upper end of the workbench, a tailstock is slidably connected to the upper end of the workbench, and a grinding wheel grinding mechanism is arranged at the upper end of the workbench. The grinding wheel polishing mechanism comprises a driving mechanism, a differential machine is fixedly connected to the outer side of the driving mechanism, a driving housing is fixedly connected to the outer side of the differential machine, a grinding wheel fixing device is fixedly connected to the outer side of the driving housing, the grinding wheel fixing device comprises a grinding wheel housing, and a driving shaft mechanism is rotationally connected to the inner side of the grinding wheel housing and comprises a main shaft. According to the cylindrical grinding machine, due to the unique structural design of the cylindrical grinding machine, an efficient, safe and easy-to-operate grinding wheel replacement solution is provided for a user, the maintenance and replacement time is greatly shortened, the labor intensity is greatly reduced, and the production efficiency is improved.

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 discloses a forklift frame welding tool which comprises a bottom plate (1), a headstock positioner (2) is fixedly arranged on the bottom plate (1), a front axle support holding mechanism (3) and a front transverse plate positioning and clamping mechanism (6) are installed on the headstock positioner (2), a tailstock positioner (4) is movably installed on the bottom plate (1), and a transition tool holding mechanism (5) is arranged on the tailstock positioner (4). The device further comprises a local transition tool (7), and the local transition tool (7) is installed on a tailstock vertical plate (83) on a forklift frame (8). The device can be compatible with frames of different models, has the advantages of being high in adjusting speed and positioning precision, and can effectively improve the production efficiency.

A lathe center frame coaxial precision measuring device belongs to the technical field of machine tools and comprises a lathe, a chuck, an adjusting sleeve, a detection rod, a center frame, a tail frame and a detection device, the chuck is in transmission connection with a spindle of the lathe, the adjusting sleeve is fixedly connected with the chuck, one end of the detection rod extends into the adjusting sleeve, the detection rod is located between the chuck and the tail frame, and the center frame is installed on the lathe. The center frame is located between the chuck and the tail frame and corresponds to the detection rod, and the detection device is movably installed on the lathe. The utility model has the beneficial effects that when the adjusting sleeve is arranged to calibrate the detection rod and measure the precision of the center frame, the adjusting sleeve and the center frame support the detection rod, the influence of a tail frame in the detection process is eliminated, the coaxial precision of the lathe spindle and the center frame can be measured through visual metering, and the measurement is more accurate.

The invention relates to an integrated machining method for a niobium-tungsten alloy composite surface variable-wall-thickness thin-wall part, and belongs to the field of metal plate forming. Determining the size of a niobium-tungsten alloy plate according to the size of the composite surface; groove milling is conducted on the spinning clamping position of the niobium-tungsten alloy plate; the machined plate is arranged on a spinning tire, and a tail top is used for clamping and fixing; the variable wall thickness forming of the curved generatrix part is realized by adopting strong shearing spinning and common spinning deep drawing spinning; the equal-wall-thickness forming of the cylindrical part is realized by adopting multi-pass deep drawing and spinning; the tiny allowance of the outer wall is removed through precise turning cutting, and it is guaranteed that the wall thickness meets the product use requirement; polishing the inner and outer surfaces to reduce the surface roughness; the niobium-tungsten alloy plate is used for forming, the material utilization rate is increased, split connection weld joints are reduced through a highly-integrated forming method, and the structural reliability is improved.

The full-automatic feeding and discharging numerical control machine tool comprises a machine body, a machine tool body is arranged on the machine body, a tailstock and a main shaft are sequentially arranged on the machine tool body in the length direction, the tailstock and the main shaft are coaxially opposite, and a machine tool inner protective cover and a tool rest table used for installing a tool turret are arranged on the machine tool body. The tool rest table achieves Z-direction movement through a Z-axis linear guide rail, a Z-axis ball screw and a screw end bearing, is driven and controlled by a Z-axis servo driver, achieves X-direction movement through an X-axis linear guide rail, an X-axis ball screw and a screw end bearing, and is driven and controlled by an X-axis servo motor and an X-axis servo driver. The servo motor and the driver drive the tool rest table to move along the X-axis and the Z-axis, the tool turret automatically changes tools, and the main shaft rotates for machining. The tailstock and the main shaft are matched to automatically clamp a workpiece, the oil pressure station provides power, pipeline maintenance components are automatically lubricated, the chip removal mechanism cleans cuttings, full-process automatic machining is achieved, and efficiency and precision are improved.

The invention belongs to the related technical field of part finish machining, and particularly discloses a shaft part machining device which comprises a base, a spindle box is arranged on one side of the upper end face of the base, hydraulic calipers are installed at the end of the spindle box, and a turning frame is arranged on the upper end face of the base and located on one side of the spindle box. A sliding seat is connected to one side of the turning frame through an arranged X-axis driving sliding rail mechanism, a double-axis adjusting seat is arranged at the upper end of the sliding seat, an installing seat is fixedly connected to the upper portion of the double-axis adjusting seat, a tool rest is connected to the upper end face of the installing seat through an arranged installing block, and a tailstock is fixedly installed above one end of the turning frame. A tool block is installed in the tool rest, the outer wall of one side of the tool rest is connected with a rotating joint through an arranged transmission mechanism, and a negative pressure pump is arranged on the outer wall of the tool rest and located at the rotating joint. The problems of resonance and long cuttings in the turning process of the slender shaft are effectively solved, and the machining quality and efficiency of shaft parts are improved.

The invention discloses a horizontal numerical control lathe and relates to the technical field of numerical control machine tools, the horizontal numerical control lathe comprises a machine base, a tool apron fixedly arranged on the machine base and a tailstock slidably arranged on the machine frame, a turning tool is installed on the tool apron, a rotating disc is rotatably arranged on the tailstock, and a motor used for driving the rotating disc to rotate is arranged on the tailstock. A turntable is arranged on the machine base, a workpiece clamping tool is arranged on the turntable, an auxiliary support is further arranged on the machine base in a sliding mode, a feeding mechanism used for driving the tailstock and the auxiliary support to slide is arranged on the machine base, and a positioning cavity used for allowing a workpiece to penetrate through is formed in the auxiliary support. And a plurality of positioning pieces for limiting radial deviation of the workpiece are arranged in the positioning cavity. By means of the turning tool, the stability of the workpiece during machining can be improved, the turning tool can conduct turning machining on the workpiece more accurately, and the machining precision and the machining quality are guaranteed.

The present invention relates to a closed - type blade - ring screwed - in cascade - channel electrochemical machining device and method, belonging to the field of electrochemical machining. The device mainly includes a support disk, a workpiece, an insulating gasket disk, a tailstock, a cathode rod, a cathode head, etc. During machining, the cathode remains fixed, and the workpiece rotates and feeds along an arc - shaped trajectory in the axial direction of the blade, gradually machining the cascade channel into shape. A group - slit structure is arranged on the cathode head to ensure sufficient supply of electrolyte to the machining area. A reverse - flow groove is arranged on the insulating gasket disk, so that when the cascade channel is about to be machined through, the electrolyte will not disperse, but under the action of the reverse - flow groove, it will be flushed back to the machining area, preventing liquid shortage and ensuring machining stability.

The invention relates to the technical field of intelligent manufacturing equipment, in particular to a turning machine tool and a turning method of a hydraulic motor output shaft. The turning machine tool comprises a rack, a drill chuck assembly used for clamping and fixing a workpiece is rotationally installed on the rack, and the drill chuck assembly is driven by a driving device arranged on the rack to rotate; a tailstock is fixed to the machine frame, and an ejector pin which can linearly move, can rotate and is used for abutting against and limiting the end of a workpiece is installed on the tailstock. A tool rest bottom plate capable of linearly moving in the axial direction of a workpiece is arranged on the rack, a rotary cutter head is arranged above the tool rest bottom plate, and a tool turret is arranged above the rotary cutter head; a plurality of turning tools with the machining precision gradually increased are sequentially and fixedly clamped on the tool turret in the circumferential direction at equal angles. The turning method is efficient, precise and high in automation degree. And the bottleneck problems of low efficiency, poor precision stability, dependence on skilled workers and the like of multi-precision shaft parts such as output shafts of hydraulic motors in the traditional turning process are effectively solved.

The invention discloses a double-station four-shaft rotating exchange workbench which comprises a fixing sleeve and a tailstock, a main shaft is rotatably arranged between the fixing sleeve and the tailstock, and the double-station four-shaft rotating exchange workbench further comprises a rotating head fixedly arranged at one end of the main shaft and rotatably connected into the fixing sleeve; the end plate is rotationally connected with the rotating head, and an external motor for driving the rotating head to rotate is mounted on the end plate; the rotating disc is coaxially and fixedly arranged on the main shaft, two rotating seats are symmetrically arranged on the upper circumference of the rotating disc, a support is fixedly arranged at the other end of the main shaft, a working table is rotationally arranged between the rotating seats and the support, and a driving assembly for driving the working table to rotate is arranged on the rotating seats. The external motor is arranged to drive the main shaft to rotate, the driving assembly drives the workbenches to rotate, then the two workbenches can be flexibly switched between the cutting station and the feeding and discharging station, horizontal installation of workpieces is achieved on the feeding and discharging station, and the workbenches can rotate to any angle for machining on the cutting station.

The invention belongs to the technical field of cylindrical grinding machine control, and provides a self-adaptive control method and system for a cylindrical grinding machine jacking tailstock. The method comprises the steps that the cone adjusting track of a jacking tailstock is determined based on the geometric structure of a to-be-ground area of a target workpiece, the posture of the jacking tailstock and the posture of a grinding wheel, and a first jacking force sequence set is determined based on the cone adjusting track, the material attribute of the target workpiece and the machining process constraint condition; grinding thermal deformation information corresponding to all track points of the cone adjusting track is obtained through prediction, jacking force correction is conducted on the first jacking force sequence set based on the grinding thermal deformation information, and a second jacking force sequence set is obtained; and in the automatic cone adjusting process, the tailstock is adjusted and controlled according to the cone adjusting track and the second jacking force data set. According to the invention, non-stop automatic cone adjustment and self-adaptive jacking force control of the tailstock in the grinding process are realized, the machining consistency and the automation level can be effectively improved, the service life of equipment can be effectively prolonged, and the device is particularly suitable for machining parts with complex taper structures and high precision requirements.

The invention relates to the technical field of machining, in particular to a thin-wall shell part flat end face clamp which comprises a positioning assembly, a clamping assembly and a clamping assembly. And the plurality of holding mechanisms are arranged on the positioning part and are used for holding the annular process table on the inner wall of the workpiece. The positioning assembly comprises a base disc used for being installed on a faceplate of a lathe spindle; the core shaft is vertically mounted in the center of one end surface of the base disc; the auxiliary supporting frame is installed on the side face of the mandrel and used for being supported on the inner surface of a workpiece; the first top disc is mounted at the end part of the core shaft, and the base disc and the first top disc are respectively positioned at two ends of the core shaft; the second top disc is used for being matched with a live center of a lathe tailstock, and the second top disc and the first top disc are used for being clamped on the two side faces of the bottom wall of the workpiece. Error compensation assemblies are installed on a radial sliding assembly and an outer side sliding assembly of the enclasping mechanism correspondingly and used for being clamped on the two side faces of the annular process table.

The furnace roller rough machining turning equipment comprises a rack, a spindle box is arranged at one end of the top of the rack, a tailstock is arranged at the other end of the top of the rack, and three-jaw chucks used for fixing a furnace roller are arranged on the opposite sides of the spindle box and the tailstock correspondingly. A turning mechanism is further arranged at the position, located between the spindle box and the tailstock, of the top of the rack, the furnace roller turning machine further comprises a movable base, a mounting plate, a furnace roller supporting mechanism and a furnace roller axial limiting mechanism, the mounting plate is arranged above the movable base, and position adjusting structures are arranged between the mounting plate and the movable base and between the movable base and the rack. The furnace roller supporting mechanism is mounted at the top of the mounting plate and used for supporting and fixing the furnace roller, the furnace roller supporting requirements of various specifications can be met, the supporting device does not need to be frequently replaced, the universality and applicability of equipment are improved, and the equipment cost and the use cost are reduced.

The utility model relates to a full-automatic floating chuck suitable for a locomotive axle and an end face cylindrical grinding machine. The floating chuck adopts a rotary oil cylinder of a hollow structure and is provided with a plurality of piston rods, the piston rods are distributed at equal intervals, a hollow rotating disc is arranged on the front side of the oil cylinder, the front end of each piston rod is flexibly connected with the rotating disc, a plurality of eccentric grooves are formed in the inner circle face of the rotating disc, and balls and thrust springs located on the circumferential rear sides of the balls are arranged in the eccentric grooves. The depth of the groove bottom of the eccentric groove located in the moving range of the balls is gradually reduced from back to front. A grinding machine headstock and a grinding machine tailstock of the grinding machine adopt the floating chuck and are provided with live centers. The floating chuck can effectively avoid hindering feeding and discharging of a mechanical arm, effectively avoid hindering grinding of the end face of a workpiece, effectively avoid hindering jumping of the center of the workpiece and effectively avoid scratching the surface of the workpiece, and is better suitable for machining of the outer circle of the end face of the workpiece such as a locomotive axle.

The invention relates to the technical field of grinding machine tail bases, and discloses an adjusting device for grinding machine tail base abrasion compensation, the adjusting device is installed on a cam grinding machine, the cam grinding machine comprises a headstock, a tail base and an operation table, tips are arranged on the headstock and the tail base, and the adjusting device comprises an adjusting mechanism and a detection mechanism. The adjusting mechanism comprises a mounting base, a mounting plate, a height adjusting assembly and a horizontal adjusting assembly, the mounting base is fixedly mounted on the operating table, the mounting plate is slidably mounted on the mounting base in the height direction of the mounting base, the tailstock is slidably mounted on the mounting base in the width direction of the mounting plate, and the height adjusting assembly is arranged between the mounting plate and the mounting base; the horizontal adjusting assembly is arranged between the mounting plate and the tailstock, and the detection mechanism is used for detecting the coaxiality of the two tips. The device is used for solving the problem that in the prior art, a tailstock tip and a headstock tip are the same in height in the Z-axis direction and are not located on the same straight line in the X-axis direction.

The external thread grinding machine comprises a machine body, a workpiece main shaft, a center frame and a grinding wheel main shaft, a Z-direction sliding plate and an X-direction sliding plate are arranged on the upper end face of the machine body, the workpiece main shaft is installed on the Z-direction sliding plate, and the center frame is installed on the Z-direction sliding plate and used for supporting the outer circle of a workpiece. The grinding wheel spindle is arranged on the X-direction sliding plate, the outer circle of one end of a workpiece can be clamped through the workpiece spindle, then the outer circle of the workpiece is supported by adjusting the center frame, grinding operation of external threads is completed, grinding of a center hole and jacking of a tailstock are not needed, the technological process is optimized, the machining cost is reduced, and the machining efficiency is improved. The invention belongs to the technical field of mechanical design.

The utility model relates to a three-jaw flexible floating chuck and a small workpiece cylindrical grinding machine. An oil cylinder of the three-jaw flexible floating chuck is a multi-rod hollow oil cylinder, piston rods are distributed at equal intervals, sliding rails are connected with the front ends of the piston rods corresponding to the sliding rails and are in axial sliding connection with the profiling templates corresponding to the sliding rails, inclined grooves serving as sliding plate guide grooves are formed in the sliding rails, and L-shaped guide grooves are formed in the inner walls, located on the outer sides of the sliding plate guide grooves, of the profiling templates. The outer side face of each sliding plate is provided with a profiling guide structure extending into the corresponding L-shaped guide groove, the profiling guide structures on the outer side faces of the sliding plates are in guide fit with the corresponding L-shaped guide grooves of the sliding plates respectively, and the clamping seats are located on the radial inner sides of the mounting plates on the corresponding sliding plates respectively and connected with the mounting plates. Live centers and the floating chucks are arranged on a headstock and a tailstock of the small workpiece cylindrical grinding machine, and the live centers penetrate through the hollow parts of the floating chucks. The small-sized workpiece cylindrical grinding operation requirement of the numerical control grinding machine can be better met.

A power assisting device for screw machining comprises a driving seat and a tailstock which are correspondingly arranged on an equipment rack left and right, a rotating chuck is arranged on the right side of the driving seat and clamps a rotating center, a tailstock center is correspondingly arranged on the left side of the tailstock, the rotating center and the tailstock center abut against and position the two ends of a screw respectively, and a supporting mechanism is arranged between the driving seat and the tailstock. The supporting mechanism radially supports the circumferential surface of the lower part of the screw rod; the supporting mechanism comprises a base, supports are correspondingly arranged on the base front and back, a U-shaped groove is formed in the upper portion of each support, a fixing shaft is installed between the two opposite side walls of each U-shaped groove, a roller is arranged in the middle of each fixing shaft in a sleeving mode and freely rolls relative to each fixing shaft, and the circumferential face of each roller abuts against the surface of the polished rod section of the corresponding screw. According to the device, the supporting mechanism is arranged between the driving base and the tail base, the roller on the supporting mechanism makes contact with the surface of the polished rod section of the screw, the overall weight of the screw is supported, the screw and the rotating tip are prevented from rotating relatively during machining, and the product machining quality is guaranteed.

The invention belongs to the technical field of turning devices, and particularly relates to a stainless steel metal turning device which comprises a rack, a four-station tool rest and a tailstock are connected to the rack in a sliding mode, the tailstock is located on one side of the four-station tool rest, a tool is fixedly connected to the four-station tool rest, a plurality of S-shaped grooves are formed in the tool, and the S-shaped grooves are communicated with the four-station tool rest. The four-station tool rest is fixedly connected with a spray head, one side of the spray head is provided with a conveying assembly used for providing cooling liquid for the spray head, the rack is rotationally provided with a chuck, the interior of the rack is fixedly connected with a recycling box, the interior of the recycling box is fixedly connected with a filtering plate, one side of the rack is slidably connected with a first scraping plate, and the first scraping plate is fixedly connected with a second scraping plate. And a second scraping plate is slidably connected into the first scraping plate, so that direct contact between the cutter and a workpiece and between the cutter and cuttings is reduced, and the problems of abrasion, cracks and oxidation of the cutter due to high temperature are avoided.

The utility model discloses a three-cutter-shaft slot planer which comprises a feeding section, a slot planing and flat planing mechanism, a first upper cutter shaft slicing section, a second upper cutter shaft slicing section and a discharging section, and propelling assemblies used for assisting in pressing and conveying plates are installed on a machine frame at intervals. The groove planing and flat planing mechanism comprises a three-cutter-shaft fixing main plate and a three-cutter-shaft wire guide cutter adjusting seat, the middle of the three-cutter-shaft wire guide cutter adjusting seat transversely penetrates through a wire guide cutter shaft assembly, a wire guide cutter is arranged at the front end of the wire guide cutter shaft assembly, and an elastic clamping assembly is arranged above the wire guide cutter; the first upper cutter shaft slicing section and the second upper cutter shaft slicing section press-fit conveyed plates through plate pressing mechanisms, each plate pressing mechanism comprises a plate pressing cross beam front base and a plate pressing cross beam tail base, a plate pressing cross beam capable of being turned and pressed downwards is jointly connected between the plate pressing cross beam front base and the plate pressing cross beam tail base, and elastic pressing parts are assembled on the plate pressing cross beams. According to the scheme, the problem of plate raw materials is solved, and meanwhile the problem of plate clamping caused by poor plates in the rubber core process is solved.

The utility model provides girth welding equipment integrated with an induction preheating and stress relief mechanism, which relates to the technical field of girth welding and comprises a worktable, a sliding rail is arranged at the top of the worktable, and a driving tailstock and a rotary clamping mechanism are arranged on the rail in a matching manner to realize coaxial clamping of workpieces; the side face of the workbench is slidably connected with a movable supporting table, the top of the workbench is provided with a supporting column and an induction preheating device, the supporting column is adjustably connected with a welding device and a stress relief device, and the welding device, the stress relief device and the movable supporting table synchronously move along with the movable supporting table. During working, a workpiece is firstly clamped and welded after induction preheating, stress is finally relieved in real time, and the rotary clamping mechanism drives the workpiece to rotate. The device integrates multiple functions, solves the problem of process dispersion of traditional equipment, prevents cracks through accurate preheating, relieves stress in real time, improves stability, and guarantees welding precision through coaxial clamping.

The invention relates to the technical field of welding equipment, and discloses movable multi-oil-nozzle welding equipment which comprises a lathe bed, a spindle box assembly, a tailstock mechanism, a material supporting base, a stand column, a wire feeder assembly, a vertical sliding rail and a welding gun positioning system. By means of head-tail cooperative clamping and multi-axis linkage design, high-coaxiality clamping of workpieces and accurate positioning of a welding gun are achieved; the V-shaped bracket automatically avoids, the wire feeder supplies wires at a constant speed, the welding gun can be finely adjusted in real time, and continuous and automatic girth welding of the multi-oil-nozzle workpiece is completed. According to the method, the welding efficiency and quality can be remarkably improved, the method adapts to various workpiece shapes, manual intervention is reduced, and high universality and expansibility are achieved.

The invention provides an internal gearing numerical control powerful gear honing machine and a using method thereof. The internal gearing numerical control powerful gear honing machine comprises a horizontal lathe bed, and the lathe bed is provided with a Z-axis sliding table conducting Z-direction feeding movement; the machine body is provided with an X-axis honing head sliding table which performs feeding movement in the X direction, the sliding table carries a swinging A-axis crossed-axis angle adjusting shaft, the A-axis crossed-axis angle adjusting shaft is fixedly connected with a B-axis honing wheel main shaft which is of a hollow structure and is provided with a honing wheel cutter, and internal meshing continuous generating rotation is achieved; the machine body is provided with a W-axis tailstock sliding table which performs feeding motion in the Z direction, the W-axis tailstock sliding table is provided with a tailstock adjusting seat which adjusts the position of a tailstock shell in the X direction, the tailstock shell is eccentrically and adjustably provided with a tailstock through a bolt, and the axis of the tailstock is adjusted to be equal to the axis of a honing wheel in height; the lathe bed is provided with a U-axis automatic tool setting device, and the U-axis automatic tool setting device moves in the X direction to achieve automatic control over the tool setting position. The device is high in integration design, compact in structure and easy to maintain; automatic clamping is achieved, and high-precision positioning and machining are achieved; the transmission is efficient, stable, safe and reliable.

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 a press screw spline milling device and a milling method thereof. The press screw spline milling device comprises a machine body, the headstock and the movable fixed tailstock are arranged on the machine body, and a mounting space for fixing a screw rod is formed between the headstock and the movable fixed tailstock; positioning holes matched with spline tooth shapes of the screw rods are distributed in the circumferential direction of the positioning disc, the screw rods are fixed through chuck fastening screw rod moving claws, and the positioning disc is installed on the headstock; the positioning block is used for locking the rotating position of the positioning disc; the slide carriage box is driven by a polished rod to realize linear reciprocating motion; and the tooth-shaped milling cutter box body is fixed on the slide carriage box. The device has the advantages that the polished rod transmission mechanism is combined with the speed regulating motor to provide stable power for the slide carriage box, the accurate path of the tooth-shaped milling cutter is ensured through the linear reciprocating motion of the polished rod transmission mechanism, the axial feeding amount is finely adjusted in cooperation with the positioning disc feeding box, accurate depth control is achieved, and the machining precision is guaranteed.

The present invention relates to the field of welding technology, and provides a penetration type double shoulder friction stir welding device and method. The welding device includes a headstock, a tailstock, an external fixture, an internal support tooling, an external welding head, and a retractable lower shoulder system. The headstock and the tailstock are arranged on the machine tool bed and are respectively configured on both sides of the workpiece to be welded, and are both used for clamping the workpiece to be welded. The internal support tooling is configured between the headstock and the tailstock and is used to expand the workpiece to be welded from the inside. The external fixture is arranged along the circumference of the workpiece to be welded and is used to clamp the workpiece to be welded. The external welding head and the retractable lower shoulder system jointly perform circumferential seam penetration type double shoulder friction stir welding on the workpiece to be welded. By means of the stirring pin penetrating the workpiece to be welded, the present invention eliminates defects such as incomplete penetration and weak bonding of the circumferential seam, and improves the quality of the circumferential seam.

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.