417 results about "Tailstock" patented technology

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 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 application discloses a kind of air-tight seal buckle cutting machining device and processing method thereof, it is related to cutting machining technical field, including lathe main body and first box board, the tailstock one end is fixedly connected with first tool rest, the one end of first tool rest is fixedly connected with second tool rest, the inside of lathe main body is fixedly connected with first box board and second box board, the one end of first box board and first tool rest is evenly provided with cleaning mechanism, by the cleaning mechanism being set, when air-tight seal buckle cutting, under the cooperation of first elastic frame, second elastic frame and guide frame, make cutting process complete in closed space, effectively prevent splashing, avoid its embedding clearance of slide rail, tool rest and other components;Meanwhile, the cutting debris directly falls into collection box via chip removal pipe, without manual blowing cleaning, significantly reduce the labor intensity of staff and cleaning difficulty, while improving overall processing efficiency.

The invention discloses a winching tail rope energy storage electric type electric automatic winding device, and relates to the technical field of automatic winding devices. The automatic winding device for the winching tail rope comprises a rotating rod, a bearing and a wire coil which are arranged on an electric tailstock, and the rotating rod is fixedly inserted into an inner ring of the bearing so that the wire coil can rotate along with the rotating rod; the automatic winding device for the winching tail rope further comprises a detection mechanism. When the electric winch releases the steel wire rope, the electric tailstock rotates passively, at the moment, the motor reducer module in the system serves as a generator, kinetic energy of the electric tailstock is converted into electric energy, and the converted electric energy can be stored in a matched energy storage element. When the winching mill pulls the steel wire rope, the stored electric energy drives the electric tailstock to rotate and wind the steel wire rope, so that the energy utilization efficiency is improved. According to the winching tail rope energy storage electric type electric automatic winding device, electric energy consumption or storage is achieved according to two different working conditions that a winching drags or releases a steel wire rope, the winding efficiency and effect are guaranteed, and the energy recovery effect can be improved.

The utility model relates to the technical field of machining clamps, and provides a double-sided hydraulic clamp for valve cover machining, which comprises a clamp bottom plate, four shafts, a tailstock, a first clamping mechanism and a second clamping mechanism, four shafts and a tailstock are respectively arranged on the clamp bottom plate; a bridge plate is arranged between the fourth shaft and the tailstock; the output end of the fourth shaft is connected with the bridge plate; the first clamping mechanism is installed on one face of the bridge plate, and the second clamping mechanism is installed on the other face of the bridge plate. The first clamping mechanism comprises a single-point-face positioning block, a double-point-face positioning block, a double-point positioning seat, a single-point positioning seat, a positioning block, a large-size push cylinder, a lengthened push column, a second pressing plate, three first pressing plates and two small-size push cylinders, all of which are arranged on the bridge plate. According to the vertical machining center, all working procedures of a valve cover product are combined into one working procedure to be completed through one set of clamp, and all machining contents of the valve cover product are completed on one vertical machining center.

The high-precision automatic machining and grinding equipment for the special-shaped shaft of the automobile transmission system comprises a rack, a rigid reference center, a floating center and two radial amplitude limiting mechanisms are arranged at the lower end of the rack, and annular shells are arranged at the tops of the two radial amplitude limiting mechanisms correspondingly; a plurality of rolling columns capable of achieving trace radial receding are rotationally connected to the inner periphery of the annular shell, a profiling grinding mechanism is arranged at the upper end of the rack, and the profiling grinding mechanism comprises a support connected into the rack in a left-right moving mode, a mounting frame connected to the support in an up-down moving mode, a contact wheel arranged at the upper end of the mounting frame and a grinding wheel arranged at the lower end of the mounting frame. The multi-section special-shaped section machining device can adapt to continuous or discontinuous multi-section special-shaped section machining on a shaft body, and is high in machining efficiency and machining precision.

This invention provides a method and apparatus for calibrating calipers with dial indicators. The method includes: Step S1, adjusting the tailstock of the length measuring instrument to a position exceeding the range of the dial indicator caliper, and installing the dial indicator caliper onto the worktable; Step S2, adjusting the tailstock of the length measuring instrument to a predetermined position, with the two measuring ends of the dial indicator caliper contacting the measuring caps on the tailstock and headstock respectively; Step S3, adjusting the state of the worktable until the reading of the dial indicator caliper is at an inflection point; Step S4, reading the reading of the dial indicator caliper, and comparing the distance from the tailstock position with the reading of the dial indicator caliper to calculate the difference. If the difference is within the allowable error range, it meets the requirements; Step S5, after completing the calibration at one calibration distance, changing the position of the tailstock to another calibration distance, and repeating Step S4 to perform the calibration at the other calibration distance. This invention solves the problem of the complex and cumbersome calibration process of dial indicator calipers in the prior art.

The utility model relates to a clamp spring which comprises a first clamping portion (11) and a second clamping portion (12) which are integrated, a first included angle is formed between the first clamping portion (11) and the second clamping portion (12) in a first plane, the first clamping portion (11) comprises a first back-bending section (112), the second clamping portion (12) comprises a second back-bending section (121), and a compressed size capable of penetrating through a middle hole. And the second back bending section (121) has a structure matched with the pin (2). The structure of the clamp spring is changed, so that the overall size is reduced, the maximum size after installation does not exceed the range of the tailstock, the distance between the clamp spring and a plastic cover is increased, and the interference risk between the clamp spring and the plastic cover is avoided.

The invention belongs to the technical field of machine tools, and particularly relates to a five-axis cradle rotary table and a machine tool, the five-axis cradle rotary table comprises an A-axis mechanism, a C-axis mechanism, a tailstock pipeline distributor and a C-axis pipeline distributor, the tailstock pipeline distributor comprises a first fixing part and a first rotating part, the first fixing part is installed on a tailstock, and the first rotating part is installed in a tailstock rotating shaft; the C-axis pipeline distributor comprises a second fixing part and a second rotating part, the second fixing part is installed on the C-axis machine body, and the second rotating part is installed in the C-axis rotating shaft. The first rotating channel communicates with the cooling channel through a first pipeline and communicates with the second fixed channel through a second pipeline. According to the five-axis cradle rotary table and the machine tool, the tailstock pipeline distributor and the C-axis pipeline distributor are arranged, so that the first pipeline and the second pipeline are not forced to twist due to the fact that the C-axis machine body rotates around the A axis any more, pipelines in the C-axis machine body are not twisted or leaked due to the fact that the C-axis rotary disc rotates around the C axis any more, the use safety of the rotary table is improved, and the service life of the rotary table is prolonged.

The utility model discloses a horizontal welding positioner, and relates to the technical field of welding positioners. The transmission case is positioned at the upper part of one side of the base in the length direction; a main shaft which is supported to rotate is arranged in the transmission case; the chuck is connected with the main shaft and is provided with a plurality of clamping jaws for clamping a first workpiece; the tailstock unit is located on the upper portion of the other side of the base in the length direction and opposite to the chuck, the tailstock unit is slidably connected with the base in the length direction of the base, and the tailstock unit is provided with a tip used for tightly jacking a second workpiece; the welding gun is used for welding a to-be-welded gap between the first workpiece and the second workpiece; and the adjusting unit is used for supporting the welding gun, and the adjusting unit is slidably connected with the base in the length direction of the base. The horizontal welding positioner disclosed by the utility model has high welding quality and working efficiency.

A gantry type bearing laser processing device comprises four parts of mounting base, synchronous belt sliding mechanism, gantry and tailstock. The gantry has three degrees of freedom, and a 90-degree right-angle laser head is mounted thereon. The laser head moves up and down and left and right in a vertical plane by using a lead screw sliding mechanism. The gantry moves in the front-back direction by using the synchronous belt sliding mechanism on the mounting base. The rotating tailstock has two degrees of freedom, and drives the three-jaw chuck to rotate as a whole by using the synchronous belt transmission. Meanwhile, the tailstock can rotate the three-jaw chuck from the horizontal clamping state to the vertical clamping state. The device has five degrees of freedom, and can realize laser processing of bearing radial inner and outer wall curved groove, micro-hole and other micro-texture morphology, and laser processing of bearing flat end face. The gantry structure of the device can adapt to the size change of the inner and outer diameters of the bearing and end face processing. The whole processing device can easily realize automatic laser processing of the bearing.

The invention discloses an optical mirror roller roundness detection device which is installed on a cylindrical grinding machine, and the cylindrical grinding machine comprises a grinding machine headstock, a control panel, a driving electric cylinder, a tailstock used for clamping a roller, a roller left-right movement driving motor and a grinding wheel feeding driving motor. The roundness detection device comprises a measurement execution mechanism, a detection analysis unit and a motion control unit. The measuring action is automatically completed by swinging the manipulator, and the detection analysis unit and the motion control unit are combined, so that the full-process automation from detection, analysis to compensation grinding is realized, the labor intensity and skill dependence of operators are remarkably reduced, and the processing period is shortened.

The agricultural sprinkler nozzle shell machining device comprises a lathe body and further comprises a feeding assembly, the feeding assembly comprises a first sliding frame and a second sliding frame which are stacked up and down, the first sliding frame is installed above the second sliding frame in a sliding mode, and the second sliding frame is installed on the lathe body in a sliding mode; the first sliding frame and the second sliding frame are each provided with a driving device, and the two driving devices drive the first sliding frame and the second sliding frame to move in the direction perpendicular to each other. The first sliding frame and the second sliding frame are vertically stacked at the tail end of the lathe body, the tailstock, the supporting mechanism, the downward pressing mechanism, the driving wheel and the like are installed on the first sliding frame, and meanwhile long blanks are placed among the supporting mechanism, the driving wheel and the downward pressing mechanism; the positions of the tailstock and the long blank relative to the spindle box can be adjusted through movement of the first sliding frame and the second sliding frame, so that the chuck clamps the end of the long blank, and then the blank is slit through a cutter.

The application discloses a guide plate tooling clamp, which comprises a bottom plate and rotating discs fixed to the front and rear ends of the bottom plate, and the two rotating discs are respectively configured to be connected with a four-axis rotary table and a tailstock; a clamping mechanism and a supporting mechanism are arranged on the bottom plate, the supporting mechanism is configured to support a guide plate, and the clamping mechanism is movably arranged on the bottom plate, so that the spacing between the clamping mechanism and the supporting mechanism in the horizontal direction and / or the vertical direction can be adjusted and changed, thereby enabling the clamping mechanism to clamp guide plates of different sizes to the supporting mechanism. The guide plate tooling clamp provided by the application can clamp or loosen the guide plate on the supporting mechanism by adjusting the gap between the clamping mechanism and the supporting mechanism through the movable clamping mechanism, which not only makes the installation and dismounting operation of the guide plate more convenient, but also enables the tooling clamp to be applicable to guide plates of different sizes.

The application discloses a double-station four-axis rotary exchange workbench, which comprises a fixed sleeve and a tail seat, a main shaft is rotationally arranged between the fixed sleeve and the tail seat, and further comprises a rotary head which is fixedly arranged at one end of the main shaft and rotationally connected in the fixed sleeve, an end plate which is rotationally connected with the rotary head and is provided with an external motor for driving the rotary head to rotate, a rotating disc which is coaxially fixedly arranged on the main shaft and is provided with two rotary seats which are circumferentially and symmetrically arranged, a support which is fixedly arranged at the other end of the main shaft, and a workbench which is rotationally arranged between the rotary seat and the support and is provided with a driving assembly for driving the workbench to rotate. The external motor is arranged to drive the main shaft to rotate, and the driving assembly is arranged to drive the workbench to rotate, so that the two workbenches can be flexibly switched between a cutting station and a feeding and discharging station, and not only can the workpiece be horizontally installed in the feeding and discharging station, but also the workbench can be rotated to any angle in the cutting station for machining.

The utility model provides a tool for welding a tailstock-free frame of a forklift, which comprises a bottom plate, a half seat positioning assembly, a front plate positioning assembly and a tail plate positioning assembly, the half seat positioning assembly, the front plate positioning assembly and the tail plate positioning assembly are respectively connected to the bottom plate, and the front plate positioning assembly is connected with the tail plate positioning assembly. The half seat positioning assembly is used for positioning a front axle of a frame, the front plate positioning assembly is used for positioning a front plate of the frame, and the tail plate positioning assembly is used for performing center positioning on the frame. According to the tool for welding the tailstock-free frame of the forklift, center positioning is carried out on the tail plate of the frame, so that the frame has adjustability during welding, the structure is simple, the positioning precision is high, and the manufacturing cost is reduced.

A necking spinning auxiliary forming mechanism comprises a conical head used for stretching into the interior of the opening edge of a thin-wall pipe body or a thin-wall cylinder body in the spinning process to provide radial support generated by a forming wheel during spinning. The conical head is fixed to the telescopic plate and sleeved with a tail top shaft of the tail box in a hollow mode, and the telescopic plate is driven by the driving device so that the telescopic path of the conical head can be parallel to the axis of the tail top shaft. Through the dynamic radial support and the axial linkage design of the driving mechanism, the thin-wall pipe necking forming process quality is remarkably improved, the workpiece necking area is dynamically supported, wrinkling and wall breaking are prevented, and the forming precision and the process stability are improved. In addition, the mechanism is integrally installed on the tailstock of the spinning machine, a main machine does not need to be transformed, the mechanism can be rapidly compatible with equipment, and the upgrading cost is reduced.

The utility model discloses a rigid stirring tailstock with buffer mechanism relates to tailstock technical field, including clamp main part, the bottom inboard rotation of clamp main part is installed with the rotating drum, and the inside screw thread connection of rotating drum has fixed part, the inside sliding of clamp main part middle portion is installed with the thimble spare, the thimble spare with fixed part is connected with the pressure spring, the inside sliding of clamp main part has a plurality of pawl spare, a plurality of pawl spare about thimble spare equiangular distribution, and every pawl spare with the side of clamp main part is all provided with a guide gear, and the guide gear rotation is installed in the inside of clamp main part. The rigid stirring tailstock with buffer mechanism, through the elastic deformation of pressure spring absorption impact energy, realizes the buffer, utilizes the cooperation between thimble spare and pawl spare simultaneously, realizes the quick response of pawl spare, improves the efficiency, and is easy to replace the wearing component.

This utility model relates to the field of shaft machining technology, and in particular to a grooving machine, including a worktable, a spindle box disposed at one end of the worktable, and a tailstock disposed at the other end of the worktable. The spindle box is provided with a first support for supporting one end of a positioning shaft, and the tailstock is provided with a second support for supporting the other end of the positioning shaft. This grooving machine offers high machining accuracy.

The invention discloses a double-helix copper pipe coiling machine device and a process thereof, and belongs to the technical field of material processing and forming. Comprising a spiral pipe coiling mechanism and a control mechanism, the spiral pipe coiling mechanism comprises a rack, and a clamp holder mechanism, a power head mechanism, a countershaft mechanism, a spiral pipe coiling tool, a double-copper-pipe leading-in mechanism and a pipe locking tool which are sequentially connected together are installed on the rack; the clamp holder mechanism locks the tip through a tailstock sliding operating rod, the power head mechanism controls rotation and the rotation speed through a power head sliding operating rod, and the shaft alignment mechanism controls an optical shaft to be aligned with the tip through a shaft alignment mechanism pressing rod. The spiral tube coiling tool is provided with an optical axis, a tip, a spiral sleeve mould and a profiling tool, and the opposite end surfaces of the profiling tool and the spiral mould are in spiral surface contact; the double-copper-pipe introducing mechanism introduces copper pipes through a feeding trolley; the defects of section deformation, low precision, poor efficiency and the like in the prior art are overcome, and the machining precision, stability and production efficiency of workpieces such as spiral coils are improved.

The utility model relates to a special full-hydraulic tailstock for a laser cladding machine tool, which is arranged on a machine body of the laser cladding machine tool and comprises a tailstock body, the tailstock body comprises a base and a top seat, the top seat is arranged at the top of the base, a tip is arranged at the left end of the top seat, and the left end of the tip is positioned on the outer side of the left end of a tip sleeve. A center oil cylinder is arranged on the side wall of the right end of the top base. The base comprises a base shell, a hydraulic station is arranged in the base shell and comprises an oil tank, an oil pump motor, an oil pump and a valve block set, the oil pump motor is fixedly arranged on the oil tank, and an output shaft of the oil pump motor is connected with a transmission shaft of the oil pump; the valve block set is provided with a first hydraulic output loop, a second hydraulic output loop and a third hydraulic output loop, the first hydraulic output loop is connected with the center oil cylinder, and the center can move left and right through cooperation of the first hydraulic output loop and the center oil cylinder. The device has the characteristics of simple structure, convenience in operation, safety and reliability.

The utility model provides a zero-tailing laser pipe cutting machine which is characterized in that a linearly moving rear chuck assembly is arranged to push or pull pipes relative to a front chuck assembly, and a moving path of a laser pipe cutting assembly is arranged to cross the front end and the rear end of the front chuck assembly to form two cutting stations. The front chuck assembly and the rear chuck assembly are matched to conduct double clamping on the pipe fitting, the pipe fitting can be pushed and fed to the first cutting station to be cut at the beginning, and the pipe fitting can be pulled and fed to the second cutting station to be cut when tail section materials are left, so that tailings are fully utilized to the maximum extent, shorter tailings are achieved, and even zero tailings are really achieved.

The utility model provides a novel numerical control machine tool belongs to numerical control machine tool technical field. It has solved the problem that the height of the ejector pin tailstock on the existing numerical control machine tool cannot be adjusted. The novel numerical control machine tool, including machine tool main part and the ejector pin tailstock of setting on machine tool main part, the ejector pin tailstock includes the lower base, upper base and ejector pin body, be provided with the adjusting device for adjusting height between the lower base and upper base, the lower base and the upper base are respectively set up and are used for installing the lower installation groove and the upper installation groove of adjusting device, adjusting device includes adjusting main part, plunger and hydraulic cylinder, the inner diameter of plunger is provided with the partition layer, the partition layer is set up and is used for installing the liquid inlet, plunger and the hydraulic cylinder between be provided with check valve, and check valve sets up at the liquid inlet, adjusting main part and relative to the contact place of plunger are set up and are used for the oil inlet groove. The utility model has the advantages of wide applicability.

A processing method of eccentric tailstock sleeve, first step, blanking allowance, second step, rough turning to get sleeve blank; third step, high temperature aging treatment to sleeve blank, fourth step, milling right end as eccentric circle φA1 as process chuck and right end step hole φB visible light; fifth step, rough turning eccentric circle φA1 and step circle table φD allowance; sixth step, rough boring left end step circle table φD allowance, get sleeve semi-finished product; seventh step, sleeve semi-finished product heat treatment; eighth step, rough grinding eccentric circle φA1 allowance, ninth step, rough boring left end hole φC, step hole φB and length L allowance; tenth step, semi-fine grinding eccentric circle φA1 and step circle table φD outer circle, end face; eleventh step, low temperature aging treatment, twelfth step, fine grinding eccentric circle φA1 to design size range, grinding step circle table φD outer circle and end face to design requirement; thirteenth step, fine boring step hole φB, hole φC to design size, get eccentric tailstock sleeve finished product.

The utility model discloses a novel processing equipment of test bar relates to processing equipment technical field, including lathe body, headstock, tailstock, transverse bed saddle, longitudinal tool rest and drive system, still include grinding mechanism and double -channel independent control system of grinding wheel, and the headstock, tailstock are provided with respectively front centre and rear centre. The test bar blank is pressed against test bar blank through front centre and rear centre when going on lathe, and starts double -channel independent control system, realizes two sets of control, and first test bar blank is carried out to lathe processing to turning control mechanism, closes the control system switch of turning mechanism after processing the basic shape of test bar, opens the control system switch of grinding control mechanism, processes test bar stem with grinding wheel grinding mechanism, and test bar stem is smooth and even after processing, and the front middle and rear position size of stem part are identical, and when carrying out the tensile test, the test bar sample fracture position is reasonable, and the experimental data is effective.

The utility model discloses a bulk material conveying system with a conveyor belt tension adjusting function, which comprises a tail seat and a head seat, a driving wheel is arranged in the head seat, and a driven wheel is further arranged in the tail seat. A conveying belt is connected between the driving wheel and the driven wheel; one side of the driving wheel is connected with a first sliding assembly on the outer side face of the headstock, and the lower portion of the first sliding assembly is connected with a first driving motor. The other side of the driving wheel is connected with a second sliding assembly on the outer side face of the headstock, and the lower portion of the second sliding assembly is connected with a second driving motor. One side of the driven wheel is connected with a third sliding assembly arranged on the outer side of the tailstock, and the third sliding assembly is driven to move through a fourth driving motor arranged on the outer side of the tailstock; the other side of the driven wheel is connected with a fourth sliding assembly on the outer side of the tailstock. Therefore, the adjusting stroke of the conveying belt is expanded, and the tensioning capacity of the conveying belt is adjusted through the tailstock.

A coolant delivery head for whirling material stock. The coolant delivery head comprising a one-piece plate like structure sized to fit between the guide bushing and whirling unit of a CNC Swiss turning machine. The coolant delivery head comprises an intake port to receive high pressure coolant through a coolant supply line. Coolant channels internal to the delivery head body, channel the coolant to a first and second delivery port and a blow port. The delivery ports are angled to deliver coolant directly at cutter inserts in the whirling unit during operation. The blow port blows coolant towards the tailstock of the machine. The coolant delivery head comprises one or more fastener holes for receiving fasteners to secure the coolant delivery head to a whirling unit. Precise delivery of the coolant results in higher quality machined products and less tool wear.

The application relates to the field of half shaft machining, in particular to an automobile half shaft grinding device which comprises a track assembly and a grinding assembly, a fixed headstock and a left and right sliding tailstock are arranged on the track assembly, a center mechanism for aligning and locking the end of the half shaft is arranged on the headstock and the tailstock, an auxiliary mechanism for supporting the area of the half shaft after polishing is further arranged on the track assembly, the positioning center, the limiting center and the abutting disc are arranged in a mutually nested sliding mode, the half shaft is sequentially positioned and limited, so that the double functions of high-precision positioning and bearing grinding load which are simultaneously borne by the traditional center are separated, meanwhile, the axial thrust and the radial load generated in the grinding process are borne by the abutting disc and the limiting center; the V-shaped block is further matched to support the area of the half shaft after grinding with high precision, so that stable positioning in the whole grinding process of the half shaft is realized, and long-time high-precision grinding operation can be carried out.

The invention relates to the technical field of welding tools, and discloses a reconfigurable modular positioner platform which comprises a base embedded plate, a guide rail is connected to the top end of the base embedded plate, and a tailstock unit, a middle frame and a driving unit are arranged above the guide rail in a sliding mode. One side of the tailstock unit, one side of the middle frame and one side of the driving unit are each connected with an interface assembly and a controller, and one side of the tailstock unit and one side of the middle frame are each connected with a rotating disc. A plurality of special positioners can be replaced, multi-variety production is covered through different combinations of the modules, the equipment acquisition cost and workshop space occupation are reduced, maintenance and partial upgrading are also facilitated through the modular design, and the use cost of the whole life cycle is reduced.