CN116475773B - Automatic assembly production line for hydraulic bushings - Google Patents

Abstract

The invention discloses an automatic assembly production line of a hydraulic bushing, which comprises a feeding station, a submerged assembly station, a deformation processing station, a cleaning station, a rigidity detection station, a laser marking station, an end cover press-fitting station and a lower line station which are sequentially arranged, wherein the feeding station and the submerged assembly station are sequentially transferred through a feeding and transferring assembly, the submerged assembly station and the deformation processing station are sequentially transferred through a discharging and transferring assembly, the deformation processing station, the cleaning station, the rigidity detection station, the laser marking station, the end cover press-fitting station and the lower line station are sequentially transferred through a feeding robot, a steam cleaning device of the cleaning station comprises a steam cover, a cleaning piece positioning structure and a fluid injection system, and the fluid injection system is connected with a steam generating device and a high-pressure air pump; the integrated hydraulic bushing full production flow of the production line can realize automatic circulation, assembly, detection and cleaning operation, improve the product assembly efficiency, and simultaneously the steam cleaning device can shorten the whole length of the production line and fully utilize the production energy of each procedure.

Description

Automatic assembly production line for hydraulic bushings

Technical Field

The invention relates to the technical field of hydraulic bushing production equipment, in particular to an automatic assembly production line of a hydraulic bushing.

Background

The hydraulic bushing consists of an elastic buffer piece, a runner plate, an outer tube and an end cover, a liquid storage cavity of the hydraulic bushing is formed between the elastic buffer piece and the runner plate, a runner is designed in the runner plate, damping liquid is filled in the liquid storage cavity and the runner, the bushing is impacted, the damping liquid can flow in the runner, and impact energy can be absorbed to eliminate vibration from being transmitted to a vehicle body;

in order to ensure the filling quantity of damping fluid, the traditional hydraulic bushing assembly adopts wet assembly, namely submerged assembly, the hydraulic bushing produced by the wet assembly is required to be subjected to multiple processing procedures and detection procedures, such as assembly, flanging or diameter reduction, cleaning, drying, rigidity detection, end cover press fitting and the like, the production of the hydraulic bushing in the prior art adopts a mode of single-procedure partition production and centralized sequence conversion again, the concentrated sequence conversion is required to be manually carried out among the procedures, the production site is relatively disordered, various types of products are easy to be confused, the problem that damping fluid pollutes each procedure partition in a production workshop exists, the site cleaning environment is difficult to maintain, and the production site management difficulty is high;

aiming at the defects of centralized sequence conversion, the invention adopts an integrated assembly production line for automatic circulation assembly of single-workpiece full-process, but corresponding process processing equipment in the prior art is not completely suitable for the assembly production line of the invention, such as related equipment of a cleaning process and a drying process in the prior art, which is suitable for a production mode of centralized cleaning and drying in a large scale, and has the defects of heating and filtering circulation of cleaning water, complex process integral arrangement, high input cost, large process occupation area and the like, and is not suitable for the production takt of single-workpiece sequence conversion and the production line thereof.

Disclosure of Invention

The invention aims to overcome the defects of wet assembly in the prior art and provides an automatic assembly production line for hydraulic bushings, which solves the problems in the prior art.

In order to achieve the above object, the technical scheme of the present invention is as follows:

the utility model provides an automatic equipment production line of hydraulic pressure bush, including setting up integrated material loading station in proper order adjacently, the equipment station under liquid, deformation processing station, wash the station, rigidity detection station, laser marking station, end cover pressure equipment station and unloading station, set up the apparatus for producing of corresponding function on each station, the material loading is carried out the commentaries on classics through the material loading transfer assembly that is located directly over both under material loading station and the equipment station under liquid, the material discharging transfer assembly changes the equipment work piece of the equipment station under it to deformation processing station, wash the station, rigidity detection station, laser marking station, end cover pressure equipment station and unloading station go on the commentaries on classics in proper order through the material loading robot, wherein, be equipped with steam cleaning device on the wash station, steam cleaning device includes the vapor hood that can open and shut, be located on the vapor hood center pin, fluid jet system passes through switching valve pipeline connection vapor generator and high-pressure air pump, cut vapor flow and high-speed air current in order, carry out vapor cleaning and air flow drying to equipment work piece surface and axis hole.

Preferably, the cleaning device further comprises a cleaning piece rotating mechanism, the steam cover comprises a lower steam cover and an upper steam cover, the upper steam cover is arranged on the lower steam cover, the upper steam cover is driven by the sealing cover lifting mechanism to lift so as to realize unsealing action, the cleaning piece rotating mechanism comprises a cleaning seat rotatably arranged at the bottom center of the lower steam cover, a steam pressure head rotatably arranged at the center of the upper steam cover and a rotary driving device for driving the steam pressure head to rotate, the cleaning piece positioning structure is arranged at the upper end of the cleaning seat, and the steam pressure head is in contact connection with the upper end face of an assembled workpiece under the synchronous driving of the sealing cover lifting mechanism so as to transmit rotary angle power.

Further preferably, the upper steam hood and the lower steam hood are combined to form an internally-sealed steam cleaning chamber, the fluid injection system comprises an upper steam chamber, a lower steam chamber, a plurality of cleaning nozzle assemblies uniformly distributed along the center ring of the steam hood, a steam orifice plate communicated with the upper steam chamber and the steam cleaning chamber, a steam orifice table surface communicated with the lower steam chamber and the steam cleaning chamber, and a steam pipe positioned under the shaft hole in the assembled workpiece, wherein the cleaning nozzle assemblies are fixed in the upper steam hood and used for cleaning and drying the outer peripheral surface of the assembled workpiece, the steam pipe is communicated with the lower steam chamber, the upper ends of the steam orifice plate and the steam head are fixedly connected and synchronously rotate with the steam orifice plate, an annular steam orifice communicated with the upper steam chamber is arranged in the steam head, the steam orifice table surface is positioned on the upper end surface of a cleaning seat, the cleaning member positioning structure comprises a plurality of positioning claws and a plurality of supporting blocks distributed along the center ring of the cleaning seat, and the supporting blocks are arranged on the steam orifice table surface and used for jointly supporting the bottom of the assembled workpiece, and the positioning claws are positioned on the outer side of the steam orifice table surface and used for jointly positioning the outer peripheral surface of the assembled workpiece.

Further preferably, the feeding station is provided with a feeding turntable, a plurality of groups of sub-workpiece positioning groups are uniformly distributed on the feeding turntable along the central annular shape, each sub-workpiece positioning group comprises an outer pipe positioning seat and an elastic body positioning seat which are positioned on the radial line of the feeding turntable, and two runner plate positioning seats which are symmetrically positioned on two sides of the radial line of the feeding turntable, the four runner plate positioning seats are connected with the feeding turntable through fixing seats, embedded grooves for positioning the lower end face of the elastic body are formed in the elastic body positioning seats, middle hole positioning columns which are matched with shaft holes in the elastic body are formed in the centers of the embedded grooves, a plurality of limiting columns are arranged on the runner plate positioning seats, runner plates are inserted and arranged among the limiting columns, and positioning grooves with the inner peripheral face matched with the peripheral face structure of the lower end of the outer pipe body are formed in the outer pipe positioning seats.

Still preferably, still be equipped with the material loading and transfer the platform between material loading station and the submerged assembly station, be provided with a set of son work piece transfer location group that is located on the material loading transfer assembly longitudinal feed track line on the material loading transfer platform, son work piece transfer location group and its adjacent son work piece location group structure are constituteed the same, the material loading transfer assembly includes material loading actuating mechanism and is driven the material clamping jaw subassembly of the duplex of lift and longitudinal movement by material loading actuating mechanism, the material clamping jaw subassembly of duplex includes that two sets of synchronous lifts, synchronous removal and synchronous clamp put gets the material clamping jaw subassembly, it includes an outer tube gripper, an elastomer gripper and two runner board grippers that are suitable for with son work piece location group distribution.

Alternatively, be provided with liquid down flanging device or automatic reducing device on the deformation processing station, liquid down flanging device sets up in the turn-ups cistern, be equipped with the material receiving slide rail in the turn-ups cistern, the both ends of travel of material receiving slide rail set up turn-ups loading point and turn-ups operation point respectively, liquid down flanging device sets up on the turn-ups operation point, it includes lift turn-ups mechanism, go up turn-ups pressure head and lower turn-ups positioning seat, lower turn-ups positioning seat can slide along the material receiving slide rail and submerge in damping liquid, automatic reducing device includes reducing groove and liftable ejector pin, the ejector pin erects in reducing groove center, ejector pin and turn-ups loading point are located the row material track line of row material transfer assembly, row material transfer assembly includes row material transfer mechanism, the tilting mechanism who sets up on row material transfer mechanism and parallel clamping jaw mechanism on, tilting mechanism is used for driving assembly work piece on the parallel clamping jaw and overturns 180.

Alternatively, the deformation processing station is simultaneously provided with a liquid lower flanging device and an automatic diameter reducing device, the discharging and transferring assembly comprises a discharging and transferring mechanism, a turnover mechanism and a liquid pouring mechanism, wherein the turnover mechanism and the liquid pouring mechanism are arranged on the discharging and transferring mechanism in parallel, the lower end of the turnover mechanism is provided with a parallel clamping jaw mechanism, the lower end of the liquid pouring mechanism is provided with a three-jaw clamping mechanism, and the liquid pouring mechanism is used for driving the three-jaw clamping mechanism to roll.

Still preferably, the rigidity detection station comprises an image positioning device and a rigidity detection device, the image positioning device is used for acquiring an image of the position of a shaft hole key slot in an assembled workpiece and calculating and adjusting the azimuth of the assembled workpiece, the rigidity detection device comprises a detection seat, a middle hole supporting structure for supporting the assembled workpiece and rigidity detection mechanisms arranged on two sides of the detection seat, the middle hole supporting structure is fixed at the tail end of the vibrator and comprises a middle hole positioning column for positioning the middle shaft hole of the assembled workpiece and an inner key slot of the middle hole positioning column, a detection piece placement hole is formed in the detection seat, the middle hole positioning column is arranged in the detection piece placement hole along the center axis, a guide chute communicated with the detection piece placement hole is further formed in the detection seat and used for guiding a detection pressing block on the rigidity detection mechanism to slide and press, and the assembled workpiece is transferred between the image positioning device and the rigidity detection device through the feeding robot.

Further preferably, the end cover press-fitting device is arranged on the end cover press-fitting station, the end cover press-fitting device comprises a lower positioning seat for positioning and assembling a workpiece, an end cover clamping structure for press-fitting the end cover and a press-fitting driving mechanism for driving the end cover clamping structure to press-fit, the end cover clamping structure comprises an end cover pressure head which is matched with the inner side surface of the end cover, and the end cover pressure head is magnetically connected with the end cover.

Still preferably, the end cover press-mounting station is further provided with an end cover automatic feeding device, the end cover is transferred to the end cover press-mounting device through a feeding robot, the end cover automatic feeding device comprises a feeding switching mechanism, a material rod, a material placing plate sleeved on the material rod and an end cover feeding mechanism, two sides of the feeding switching mechanism are respectively provided with a feeding level and a material preparing level, the feeding level and the material preparing level are respectively provided with a material rod, the material positions of the two material rods are alternately switched through rotation of the feeding switching mechanism, the end cover is sleeved on the material rod and stacked on the material placing plate, the upper end of the material rod of the feeding level is the end cover material taking level, and the end cover feeding mechanism drives the material placing plate of the feeding level to move upwards to push the end cover at the uppermost end of the end cover to enter the end cover material taking level.

Compared with the prior art, the automatic assembly production line for the hydraulic bushing has the following beneficial effects:

1. the assembly production line integrates the full production flow of the hydraulic bushing, can realize automatic transfer, assembly, cleaning and detection operation of the hydraulic bushing, does not need manual interference transfer, improves the product assembly efficiency, ensures the cleanliness of workshops and stations, can avoid model confusion caused by transfer of various types of products, is convenient for production site management, and adopts a steam cleaning device with a closed environment to sequentially carry out steam cleaning and air flow drying on the residual damping liquid on the surface of an assembled workpiece, so that the whole length of the production line can be effectively shortened, the transfer of assembled workpieces between a cleaning process and a drying process is omitted, and meanwhile, the steam cleaning device is adaptive to the production rhythm of the single hydraulic bushing, fully utilizes the production energy of each process, and sequentially promotes the assembly production of the products;

2. The assembly production line is provided with a feeding turntable, so that damping liquid of an underwater assembly station is prevented from polluting a feeding station, and a sub-workpiece is adjusted; the deformation processing station is provided with the submerged flanging device and the automatic diameter reducing device at the same time, flanging or diameter reducing processing can be automatically selected according to the model of the product, the discharging and transferring assembly arranged above can overturn the assembled workpiece before the deformation processing procedure, and the residual liquid at the upper end is poured and removed after the submerged flanging procedure, so that the damping liquid is prevented from being polluted by diffusion, and the rapid cleaning effect of the cleaning station is facilitated; the detection station adopts the image positioning device to adjust the azimuth after influencing and positioning the middle shaft hole and the key groove of the assembled workpiece, so that the first feeding robot can conveniently and rapidly and accurately load the assembled workpiece on the rigidity detection device, and the automatic loading and the subsequent detection, the laser marking and the end cover press mounting are facilitated; the end cover press-fitting station is provided with the end cover automatic feeding device located in the wet working area, and the end cover feeding is automatically performed by using the second feeding robot, so that the manual end cover feeding and the automatic end cover feeding are located in different working areas, the ordered production is ensured, the assembly efficiency is improved, and the manual labor intensity is reduced.

Drawings

FIG. 1 is a schematic perspective view of an assembly line according to the present invention;

FIG. 2 is a top view of the assembly line of the present invention;

FIG. 3 is a schematic view of the loading station of FIG. 1;

FIG. 4 is a schematic perspective view of the submerged assembly station of FIG. 1;

FIG. 5 is a schematic view of the internal structure of the submerged assembly station of FIG. 4;

FIG. 6 is a schematic perspective view of the flow field plate assembly mechanism of FIG. 4;

FIG. 7 is a schematic perspective view of the outer tube press-fitting mechanism of FIG. 4;

FIG. 8 is a schematic perspective view of the feed transfer assembly of FIG. 1;

FIG. 9 is a schematic illustration of the arrangement of the submerged assembly station and the deformation processing station in the preferred embodiment;

FIG. 10 is a schematic perspective view of the discharge and transfer assembly of FIG. 9;

FIG. 11 is a schematic perspective view of the steam cleaning device of FIG. 1;

FIG. 12 is a schematic view showing the internal structure of the upper steam hood of FIG. 11;

FIG. 13 is a schematic view of the inspection station of FIG. 1;

FIG. 14 is a schematic view of the structure of the detecting seat in FIG. 13;

FIG. 15 is a schematic view of the end cap press-fitting station of FIG. 1;

FIG. 16 is a schematic view of the end cap clamping structure of FIG. 15;

fig. 17 is a schematic structural view of the automatic feeding device for end caps in fig. 16.

In the figure: 000. a master control system platform; 010. a feeding and transferring assembly; 011. a feeding lifting mechanism; 012. a feeding transfer mechanism; 013. a runner plate gripper; 014. an elastomeric gripper; 015. an outer tube gripper; 020. a discharging and transferring assembly; 021. a discharging and transferring mechanism; 022. a discharging lifting mechanism; 023. a turnover mechanism; 024. a liquid pouring mechanism; 025. a three-jaw clamping mechanism; 026. a parallel jaw mechanism; 030. a first feeding robot; 031. mechanical clamping jaws; 040. a second feeding robot; 041. the end cover pneumatic clamping mechanism; 050. a feeding middle rotary table; 051. a transfer positioning disk; 052. a workpiece detection element; 060. an end cover automatic feeding device; 061. an end cover feeding mechanism; 062. a material rod; 064. a feeding switching mechanism; 065. a material placing plate; 070. a wire feeding device; 100. a feeding device; 110. a feeding turntable; 120. a fixing seat; 130. a deviation correcting detection element; 140. an outer tube positioning seat; 141. a positioning groove; 150. a runner plate positioning seat; 151. a limit column; 160. an elastomer positioning seat; 161. a imbedding groove; 162. a mesoporous positioning column; 170. a unit plate; 200. a submerged assembly device; 210. assembling a liquid tank; 220. a station turntable; 250. A runner plate assembly mechanism; 251. an elastomer positioning arm; 252. fork claws; 253. the runner plate clamps the actuating mechanism; 254. a flow channel plate radial moving mechanism; 255. a runner plate lifting mechanism; 256. a runner plate pressing mechanism; 260. an outer tube press-fitting mechanism; 261. a clamping body; 262. a clamping cylinder; 263. a mechanical clamping mechanism; 264. an outer tube lifting mechanism; 265. an outer tube radial movement mechanism; 300. a submerged flanging device; 310. a flanging pressure head is arranged; 320. a lower flanging positioning seat; 330. a sliding seat; 400. an automatic diameter reducing device; 410. a push rod; 420. a reducing groove; 500. a steam cleaning device; 510. a lower steam hood; 520. a cleaning member positioning structure; 521. a positioning claw; 522. a support block; 530. cleaning the lower assembly; 531. a steam pipe; 532. a steam hole mesa; 540. a sliding mechanism; 541. a limit buffer member; 550. a steam cover is arranged; 560. a rotation driving device; 570. a cover lifting mechanism; 580. cleaning the spray head assembly; 590. cleaning the upper assembly; 591. a steam orifice plate; 592. a steam pressure head; 600. an image positioning device; 610. a shadow picking positioning seat; 620. a shadow picking device; 700. a rigidity detecting device; 710. a vibrator; 720. a mesoporous support structure; 730. a rigidity detecting mechanism; 731. detecting a pressing block; 740. a detection seat; 741. a detection piece placement hole; 750. a support column; 800. a laser engraving device; 810. an imprinting piece positioning seat; 820. a imprinting member conveying mechanism; 900. an end cover press-fitting device; 910. a press-fitting driving mechanism; 920. an end cap clamping structure; 921. an end cap pressure head; 922. an end cover side plane positioning block; 930. an elastic support structure; 940. and a lower positioning seat.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only preferred embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 17, the embodiment of the present invention provides an automatic assembly line for hydraulic bushings, which covers all production processes of hydraulic bushings, namely, sub-work piece (elastomer, runner plate and outer tube) feeding, sub-work piece assembling, sub-work piece flanging or compressing and other deformation processing, work piece assembling cleaning, performance detection, laser engraving, end cover press fitting and finished product unloading, specifically, the assembly line of the embodiment comprises an integrated feeding station, an underfloor assembly station, a deformation processing station, a cleaning station, a stiffness detection station, a laser engraving station, an end cover press fitting station and an unloading station which are adjacently arranged in sequence, each station is provided with a production device with corresponding functions, wherein the underfloor assembly station is positioned under damping liquid, a feeding transfer assembly 010 which is positioned right above the two sub-work pieces synchronously, a discharge transfer assembly 020 transfers a single assembly work piece of the underfloor assembly station to the deformation processing station, a first feeding robot 030 sequentially transfers the assembly work piece of the deformation processing station to the cleaning station, the stiffness detection station and the end cover press fitting station to a second station, a laser engraving station is positioned on the same axis, a drying station is positioned on the same station and a steam printing station is positioned on the same axis, and a cleaning device is positioned on the same station 500, and a cleaning device for the same axis is positioned on the same station is used for cleaning and a steam printing station is positioned on the drying station 500, the fluid jet system is connected with a steam generating device (not shown) and a high-pressure air pump (not shown) through a switching valve (not shown) pipeline, the switching valve is electrically connected with a main control system platform 000, an operator can preset steam cleaning time and air flow drying time, corresponding pipelines are sequentially started to cut through steam flow and high-speed air flow, steam cleaning and air flow drying are respectively carried out on the outer surface and a center shaft hole of an assembled workpiece, the assembled workpiece is uniformly wrapped by high-temperature steam, heat transfer is generated after the assembled workpiece is encountered at low temperature, water drops are formed on the surface of the assembled workpiece by rapid condensation, residual damping liquid can be well diluted and stripped at higher temperature and flows away along with the water drops, the surface is cleaned again through the high-speed air flow, the liquid drops are taken away, and redundant high-temperature steam is directly recovered through a recovery pipeline connected with the lower part of the side of the steam hood and can be directly reused; in addition, the assembly production line is operated and partitioned according to station operation characteristics, as shown in fig. 1-2, a feeding station, a submerged assembly station and a deformation processing station are located in a wet working area, an inlet of the wet working area is provided with a master control system platform 000, human-computer interaction is convenient for operators to set, the feeding station is located at one side of the inlet, a manual feeding end of the feeding station is arranged towards the outer side, the operators are convenient for feeding sub-workpieces, the wet working area is subjected to order turning through a feeding transfer assembly 010 and a discharging transfer assembly 020 of a sliding rail structure, a cleaning station, a rigidity detection station, a laser marking station, an end cover press-fitting station and a lower line working station are enclosed to form a dry working area, and a first feeding robot 030 and a second feeding robot 040 capable of operating in multiple stations are arranged in the dry working area automatically and are convenient for centralized management and control, and the whole occupied area of the production line is reduced.

In this embodiment, in order to perform full-scale steam cleaning on the combined workpiece and accelerate droplet detachment, the steam cleaning device 500 further comprises a cleaning member rotating mechanism, as shown in fig. 11-12, wherein the upper steam hood 550 is driven to lift by the cover lifting mechanism 570 to cover and open the lower steam hood 510, a closed steam cleaning chamber is formed inside, the cleaning member rotating mechanism comprises a cleaning seat rotatably arranged at the bottom center of the lower steam hood 510, a steam pressure head 592 rotatably arranged at the center of the upper steam hood 550, and a rotary driving device 560 for driving the steam pressure head 592 to rotate, the steam pressure head 592 is driven to move downwards by the cover lifting mechanism 570 synchronously and is pressed against the upper end surface of the combined workpiece to transmit rotation angle power, the combined workpiece is driven to rotate by the rotary driving device 560, so that the steam flow and high-speed air flow of the fluid jet system uniformly act on the combined workpiece, the fluid jet system comprises an upper steam chamber, a lower steam chamber, a steam orifice 591 communicated with the upper steam chamber and the steam cleaning chamber, a plurality of cleaning nozzle components 580 uniformly distributed along the center of the steam pressure head 592, a steam orifice table 532 communicated with the lower steam chamber and the steam cleaning chamber, and a steam pipe 531 positioned right below the shaft hole in the assembled workpiece, wherein after the steam pressure head 592 descends and contacts the upper end face of the assembled workpiece, the cleaning nozzle components 580 are opposite to the middle of the assembled workpiece, jet steam flow on the outer surface of the assembled workpiece, a rotary driving rod of the rotary driving device 560 passes through the upper steam chamber and is connected with the steam pressure head 592 fixed at the lower end of the rotary driving device 560, the steam orifice 591 encapsulates the upper steam chamber and is fixedly connected with the upper end of the steam pressure head 592 to synchronously rotate, the steam pressure head 592 is internally provided with an annular steam hole communicated with the upper steam chamber, the annular steam hole is used for jetting steam to clean a plurality of arc-shaped slotted holes on the upper end face of the assembled workpiece, the lower steam chamber is arranged at the bottom of the lower steam hood 510, the cleaning seat is covered on the upper port of the upper steam chamber, the steam pipe 531 is arranged in the central hole of the cleaning seat and communicated with the lower steam chamber, the upper steam spraying steam flow of the cleaning seat cleans the central hole of the assembled workpiece, the steam hole table 532 is arranged on the upper end surface of the cleaning seat, the steam hole plate 591 and the steam hole table 532 are used for spraying steam to the upper end surface and the lower end surface of the assembled workpiece, the cleaning piece positioning structure 520 comprises a plurality of positioning claws 521 and a plurality of supporting blocks 522 distributed annularly along the center of the cleaning seat, at least three supporting blocks 522 are arranged on the steam hole table 532, a small-area supporting plane for placing and supporting the assembled workpiece is formed, at least three positioning claws 521 are fixed on the step ring plane of the cleaning seat through adjustable sliding grooves and are arranged outside the steam hole table 532 and used for jointly positioning the outer circumferential surface of the assembled workpiece, further, in order to reserve sufficient feeding space, the end of the sliding mechanism 540 is further provided with a limiting buffer piece for buffering and positioning stopping point, the first feeding robot 030 places the assembled workpiece in the cleaning piece positioning structure 520, the sliding mechanism 540 is arranged in the sliding cover positioning structure 520, and the sliding mechanism 540 stops the lower cover 510 and drives the steam hood 550 to move directly under the upper part 550.

In this embodiment, the feeding station can simultaneously realize simultaneous feeding of four sub-workpieces, the sub-workpieces at the manual feeding end are rotationally fed to the feeding end of the feeding transfer assembly 010 through the feeding turntable 110, as shown in fig. 3, a plurality of groups of sub-workpiece positioning groups are uniformly distributed on the feeding turntable 110 along the central annular shape thereof, each sub-workpiece positioning group comprises an outer tube positioning seat 140 and an elastomer positioning seat 160 which are positioned on the radial line of the feeding turntable 110, and two runner plate positioning seats 150 which are symmetrically positioned on two sides of the radial line of the feeding turntable 110, as a preferable compact arrangement design, the elastomer positioning seat 160 is positioned on one side close to the rotation center of the feeding turntable 110, the outer tube positioning seat 140 is positioned on one side close to the edge of the feeding turntable 110, and the four groups are assembled with the unit plates 170 through the fixing seats 120 to form an assembly unit, thereby being convenient to install and adjust, the elastic body positioning seat 160 is provided with a positioning groove 161 for positioning the lower end face of the elastic body, the center of the positioning groove 161 is provided with a middle hole positioning column 162 which is matched with the middle shaft hole of the elastic body, the runner plate positioning seat 150 is provided with a plurality of limiting columns 151, the runner plate is inserted and set between the limiting columns 151, the outer pipe positioning seat 140 is provided with positioning grooves 141 which are matched with the groove inner peripheral face and the outer peripheral face structure of the lower end of the outer pipe body, positioning is realized by respectively utilizing a specific structure on the sub-workpieces, sub-workpieces with wrong feeding are easy to find, photoelectric detection is carried out on corresponding points of each sub-workpiece of the workpiece positioning group at the feeding end of the feeding transfer assembly 010 by utilizing a deviation rectifying detection element 130 on the feeding turntable 110, if the problems such as reverse installation of the elastic body or deviation of the runner plate exist, the feeding turntable 110 automatically switches and conveys the next group of workpiece positioning groups, and the problem group returns to the manual feeding end for manual deviation rectifying.

In this embodiment, the submerged assembly station is disposed in the assembly liquid tank 210, the upper side of the assembly liquid tank 210 is surrounded by a glass plate, the assembly liquid tank 210 is connected with a damping liquid circulation system through a damping liquid circulation hole disposed at the bottom of the tank to circulate and supplement damping liquid, the damping liquid circulation system comprises a hydraulic pump, a damping liquid storage tank and a filtering device disposed in the damping liquid storage tank, a damping liquid level of the damping liquid storage tank is paved with a piece of decontamination paper, a station turntable 220 of the annular station is immersed in the damping liquid of the assembly liquid tank 210 and at least comprises a feeding sub-station, a runner plate assembly sub-station, an outer pipe press-fitting sub-station and a discharging sub-station, a corresponding station device or a transfer mechanism is disposed above each station, wherein the feeding sub-station and a sub-workpiece positioning group close to one side of the submerged assembly station are jointly disposed on a longitudinal feeding track line of the feeding transfer assembly 010, and the discharging sub-station is disposed on a discharging track line of the discharging transfer assembly 020;

each sub-station of the submerged assembly station is provided with a sub-station positioning group, the sub-station positioning group is identical to the sub-workpiece positioning group of the feeding turntable 110, each sub-station is also provided with an elastomer positioning seat 160, two runner plate positioning seats 150 and an outer tube positioning seat 140, and the sub-stations are assembled and positioned on the station plates of the station turntable 220 through the fixing seats 120, the runner plate positioning seats 150 are provided with a plurality of profiling positioning blocks for positioning the runner plates, as shown in fig. 3, in order to facilitate the arrangement of corresponding mechanisms and assembly operation, the elastomer positioning seats 160 are arranged at one side far from the center of the station turntable 220, the outer tube positioning seats 140 are arranged at one side near the center of the station turntable 220, and are both positioned on the radial line of the symmetry center of the station, the two runner plate positioning seats 150 are symmetrically arranged at two sides of the radial line of the symmetry center of the station, the radial line included angle of the symmetry center of the station of the adjacent two stations is 360 DEG/work bit number, as shown in fig. 4-5, the station turntable 220 is provided with 6 stations, two stations are reserved for reservation, and corresponding stations like can be additionally arranged according to actual production requirements;

The runner plate assembling sub-station is positioned at the front end of the outer tube press-fitting sub-station, a runner plate assembling mechanism 250 is arranged right above the runner plate assembling sub-station, as shown in fig. 6, the runner plate assembling mechanism 250 is driven by a runner plate clamping action mechanism 253, a runner plate radial moving mechanism 254 and a runner plate lifting mechanism 255 to realize relative clamping action, radial feeding action and lifting action respectively, the runner plate assembling mechanism 250 comprises an elastomer positioning arm 251 capable of lifting and pressing positioning elastomers, two runner plate assembling arms for respectively clamping two runner plates to assemble, the runner plate assembling arm comprises an assembling arm body, a fork claw 252 positioned at the bottom end of the assembling arm body and a runner plate pressing mechanism 256, the fork claw 252 is used for positioning and clamping the runner plates, the runner plates in the fork claw 252 are driven by the runner plate pressing mechanism 256 to press the peripheral structures of the elastomers from two sides, the two runner plates are respectively embedded in the surface structures of the elastomers and are mutually inserted, a position detector is arranged above the runner plate pressing mechanism 256, and the feeding amount of a pressing block is detected, and a feedback control system judges whether the runner plates are pressed in position or not;

as shown in fig. 7, the outer tube press-fitting mechanism is driven by an outer tube radial moving mechanism 265 to realize the feeding movement of the outer tube, and an outer tube lifting mechanism 264 to realize the up-down movement and press-fitting movement, and comprises a clamping cylinder 262, three clamping bodies 261 and a mechanical clamping mechanism 263 for driving the clamping bodies 261 to clamp.

In this embodiment, in order to prevent damping fluid of the submerged assembly station from polluting the feeding turntable 110, a feeding middle turntable 050 is disposed between the feeding station and the submerged assembly station, and meanwhile, the feeding transfer assembly 010 adopts a duplex material taking clamping jaw structure clamped synchronously by synchronous lifting, wherein, referring again to fig. 3, a group of sub-workpiece transfer positioning groups on a feeding track line of the feeding transfer assembly 010 are disposed on the feeding middle turntable 050, the sub-workpiece transfer positioning groups have the same structure as the sub-workpiece positioning groups, and comprise an outer tube positioning seat 140, an elastomer positioning and two runner plate positioning seats 150, which are connected with a transfer positioning disc by a fixing seat 120, and because the distribution of the sub-workpiece positioning groups on the station turntable 220 is opposite, the elastomer positioning seat 160 and the outer tube positioning seat are required to be rotated and replaced, a transposition rotating device for driving the sub-workpiece positioning groups to rotate by 180 degrees is disposed under the transfer positioning disc 051, the feeding transfer table 050 is also provided with a sub-workpiece detecting element 052 for monitoring and feeding back data information of whether the feeding transfer assembly 010 is empty to the general control system platform 000, as shown in fig. 8, the feeding transfer assembly 010 comprises a feeding lifting mechanism 011, a feeding transfer mechanism 012 and a double-combined material taking clamping jaw assembly driven to lift and longitudinally move by the feeding lifting mechanism 011 and the feeding transfer mechanism 012, the double-combined material taking clamping jaw assembly comprises two groups of material taking clamping jaw assemblies which synchronously lift, synchronously move and synchronously clamp, the transfer of the feeding and the lower groups of sub-workpieces of the current group can be realized, the material taking clamping jaw assembly comprises an outer pipe mechanical jaw 015, an elastic body mechanical jaw 014 and two runner plate mechanical jaws 013 which are matched with the sub-workpiece positioning group, the outer pipe mechanical jaw 015 and the elastic body mechanical jaw 014 are used for clamping the outer peripheral surface of a cylindrical part, the structure of the mechanical gripper is the same, the mechanical gripper comprises a material taking driving mechanism and three gripper bodies, the material taking driving mechanism comprises an upper pneumatic clamping cylinder and three parallel four-bar mechanisms, the pneumatic clamping cylinder drives the parallel four-bar mechanisms to radially stretch and retract, the gripper bodies at the lower ends of the parallel four-bar mechanisms are enabled to retract and release inwards, the runner plate mechanical gripper 013 comprises three clamping columns and parallel clamping jaw cylinders, the parallel clamping jaw cylinders adopt parallel finger cylinders, one clamping column is located on one parallel finger of the parallel clamping jaw cylinders, the other two clamping columns are located on the other parallel finger of the parallel clamping jaw cylinders, and the three clamping columns form three points to locate inwards and pick up the middle part of an outer cambered surface and two symmetrical end parts of an inner cambered surface of the runner plate of the arc-shaped structure respectively.

In this embodiment, the deformation processing station performs compression processing or flanging processing on the assembled workpiece according to the structures of different types of hydraulic bushings, a liquid lower flanging device 300 or an automatic diameter reduction device 400 is correspondingly arranged, or both the liquid lower flanging device 300 and the automatic diameter reduction device 400 are preferably arranged at the same time, as shown in fig. 9, the liquid lower flanging device 300 is arranged in a flanging liquid tank, a material receiving slide rail is arranged in the flanging liquid tank, two travel ends of the material receiving slide rail are respectively provided with a flanging feeding point and a flanging operation point, an operation space of a material discharging transfer assembly 020 is reserved, the liquid lower flanging device 300 comprises a lifting flanging mechanism, an upper flanging pressure head 310 and a lower flanging positioning seat 320, a flanging positioning structure for placing and positioning the lower end of the assembled workpiece is arranged in the lower flanging positioning seat 320, the lower flanging positioning seat 320 is elastically mounted on a sliding seat 330 and immersed in damping liquid, the sliding seat 330 can slide along the material receiving slide rail under the driving of the sliding mechanism, the lifting flanging pressure head 310 and the lifting flanging mechanism for driving the upper flanging pressure 310 to downwards are both positioned on the flanging operation point, the upper flanging pressure is provided with a corresponding upper end of the flanging pressure head 310, and the outer tube is provided with a corresponding flanging structure for punching and processing strength is enhanced; the automatic diameter reducing device 400 comprises a diameter reducing groove 420 and a lifting ejector rod 410, wherein the ejector rod 410 is vertically arranged in the center of the diameter reducing groove 420, penetrates through a middle shaft hole of an assembled workpiece and is positioned and supported by a step seat arranged on the middle shaft hole, and after the ejector rod 410 drives the assembled workpiece to descend to the diameter reducing space of the diameter reducing groove 420, a diameter reducing block in the diameter reducing groove 420 is used for reducing the outer pipe body, so that the bonding strength of the outer pipe body and an elastic body is enhanced; the ejector rod 410, the flanging feeding point and the blanking sub-station are all positioned on a discharging track line of the discharging and transferring assembly 020, after the sub-workpieces are assembled in the submerged assembling device 200, the formed assembled workpieces need to be turned over by 180 degrees to carry out the procedures of subsequent flanging, detection, end cover press fitting and the like, when the submerged flanging device 300 or the automatic reducing device 400 is only arranged, the discharging and transferring assembly 020 can be provided with only one parallel clamping jaw mechanism 026 capable of carrying out flanging, the parallel clamping jaw mechanism 026 can adopt a parallel finger cylinder so as to facilitate clamping and turning over, and specifically, as shown in fig. 9-10, the discharging and transferring assembly 020 comprises a discharging and transferring mechanism 021, a turning over mechanism 023 and a parallel clamping jaw mechanism 026 which are arranged on the discharging and transferring mechanism 021, the parallel clamping jaw mechanism 026 is fixed at the lower end of the turning over mechanism 023 and driven by the turning over mechanism 026 by 180 degrees, in the embodiment, the turning over mechanism 023 is preferably a chain sprocket mechanism is driven, and the discharging and transferring mechanism 021 is a total driving mechanism capable of driving the parallel clamping jaw mechanism 026 to move up and down; referring again to fig. 9, in this example, the deformation processing station is sequentially provided with the submerged flanging device 300 and the automatic diameter reducing device 400 in a straight line, and the hydraulic bushing model input by the general control system platform 000 is automatically selected to perform the compression or flanging, in this embodiment, in order to improve the discharging efficiency, the discharging and transferring assembly 020 further includes a three-jaw clamping mechanism 025 linked with the parallel clamping jaw mechanism 026, for synchronously evacuating the assembled workpiece on the submerged flanging device 300 so as to perform the flanging operation, meanwhile, the submerged flanging device 300 and the automatic diameter reducing device 400 are respectively used as transfer stations of the diameter reducing process and the flanging process, that is, when the general control system platform 000 selects to perform the flanging process operation, the automatic diameter reducing device 400 is used as a material taking point of the first feeding robot 030, and the compression operation is not performed, when the general control system platform 000 selects to perform the diameter reducing process operation, the submerged flanging device 300 is used as a temporary discharging point between the blanking sub-station and the automatic diameter reducing device 400, the flanging operation is not performed, damping liquid is reserved on the surface of an assembled workpiece in a flanging liquid groove for dumping and removing, so that a dry operation area is prevented from being polluted, the three-jaw clamping mechanism 025 is arranged at the lower end of the liquid dumping mechanism 024 and is driven by the three-jaw clamping mechanism to roll at about 120 degrees, the overturning mechanism 023 and the liquid dumping mechanism 024 can adopt the same structure, the discharging transfer mechanism 021 comprises two discharging lifting mechanisms 022 which are arranged in parallel, and the overturning mechanism 023 and the liquid dumping mechanism 024 are respectively arranged on the discharging lifting mechanisms 022 and can be controlled to realize synchronous lifting so as to synchronously perform feeding and discharging on the same station.

In this embodiment, the stiffness detection station integrates vibration detection and stiffness detection, in order to facilitate positioning of the central shaft hole and the inner key slot of the assembled workpiece, an image positioning device 600 is disposed at the front end of the stiffness detection device 700 to lock the position of the key slot of the assembled workpiece and adjust it to a preset orientation, so that the first feeding robot 030 is quickly and correctly loaded into the stiffness detection device 700, as shown in fig. 13, the image positioning device 600 includes an image analysis control module, a shadow capturing device 620 for capturing an image of the position of the central shaft hole of the assembled workpiece and feeding back to the image analysis control module, a shadow capturing positioning seat 610 for placing the assembled workpiece, and an adjustment driving mechanism for driving the shadow capturing positioning seat 610 to rotate according to a control signal of the image analysis control module, the shadow capturing device 620 is specifically a color scale sensor, an industrial camera or a width and edge measurement sensor, the image capturing device 620 transmits image data information to the image analysis control module, the image analysis control module compares the image data information with preset theoretical image data, calculates and analyzes an adjustment angle, and feeds back the adjustment angle to the adjustment driving mechanism to rotate the assembled workpiece on the image capturing positioning seat 610 to a preset position, the assembled workpiece after the adjustment angle is transferred between the image positioning device 600 and the rigidity detection device 700 by the first feeding robot 030, as shown in fig. 14, the rigidity detection device 700 comprises a detection seat 740 for loading the assembled workpiece, a support column 750 fixedly connected with the lower end of the detection seat 740, a middle hole support structure 720 for supporting the assembled workpiece, and rigidity detection mechanisms 730 arranged at two sides of the detection seat 740, the middle hole support structure 720 comprises a middle hole positioning column 162 for positioning a middle hole of the assembled workpiece and a key slot in the middle hole positioning column, a detection piece placing hole 741 is arranged on the detection seat 740, the first feeding robot 030 turns the assembled workpiece into a horizontal state and is inserted into the middle hole positioning column 162 in the detection piece placing hole 741, the middle hole positioning column 162 is positioned on the central axis of the detection piece placing hole 741, in the rigidity test, the two symmetrical detection pressing blocks 731 of the rigidity detection mechanism 730 relatively move along the guide sliding grooves on the detection seat 740 under the driving of the detection motor, load is applied to the surface of the assembled workpiece, the deformation of the assembled workpiece is monitored by the detection system and whether the assembled workpiece is qualified or not is judged, the middle hole supporting structure 720 is fixed at the tail end of the vibrator 710, in the vibration test, the vibrator 710 positioned above the detection seat 740 generates continuous and stable excitation action on the assembled workpiece through the middle hole supporting structure 720 at the tail end of the vibrator, and the physical data of the assembled workpiece is collected by the detection system to judge whether the quality of the assembled workpiece meets the set standard or not.

In this embodiment, as shown in fig. 15-16, the end cover press-fitting device 900 includes a lower positioning seat 940 for positioning an assembled workpiece, an end cover clamping structure 920 for press-fitting the end cover and a press-fitting driving mechanism 910 for driving the end cover clamping structure 920 to press-fit, the lower positioning seat 940 is provided with a corresponding structure for positioning and placing the assembled workpiece, which is located directly below the end cover clamping structure 920, refer to fig. 16 again, the end cover clamping structure 920 includes an end cover pressing head 921 adapted to the inner side surface of the end cover and end cover side plane positioning blocks 922 located on two side planes of the end cover pressing head 921, the end cover pressing head is embedded with a magnetic body, so as to position and magnetically clamp the end cover, the end cover clamping structure 920 is located on the lower end surface of the press-fitting driving mechanism 910, the lower end surface of the press-fitting driving mechanism 910 is further provided with an upper guide sleeve in an elastic support structure 930, a lower elastic column in the elastic support structure 930 is arranged on the press-fitting platform for fixing the lower positioning seat 940, the elastic support structure 930 is distributed on the periphery of the end cover clamping structure 920 in a rectangular shape, and the end cover after the press-fitting is supported by the separating structure 920, in order to avoid the press-fitting, the end cover clamping structure 920 is attached to the end cover clamping structure with the end cover side surfaces by the end cover clamping structure 921, and the end cover side plane positioning block is pressed by the upper end cover positioning block 921 is still attached to the upper end cover side of the upper end cover, and the upper end cover is pressed by the elastic support plane, and the upper end cover is still attached to the upper end cover on the upper end cover side of the elastic support surface of the upper end cover, which is pressed by the upper end cover, and the upper end cover is pressed by the elastic support is pressed by the upper side, and the upper end cover, and lower is pressed by.

As a further technical scheme of the end cover press-fitting device 900, an end cover automatic feeding device 060 is arranged at the side of the end cover press-fitting device 900, the end cover is transferred to the end cover press-fitting device 900 through a second feeding robot 040, as shown in fig. 17, the end cover automatic feeding device 060 comprises a feeding switching mechanism 064, a feeding rod 062, a feeding plate 065 sleeved on the feeding rod 062 and an end cover feeding mechanism 061, two sides of the feeding switching mechanism 064 are respectively provided with a feeding level and a standby level, in order to facilitate manual feeding, an operator can feed the end cover by the 'wet working area', the feeding level and the standby level are respectively provided with a feeding rod 062, two symmetrical positioning planes are axially arranged on the circumferential surface of the feeding rod 062, holes and flanging in the end cover are convenient to insert and position, the two feeding rods 062 can be alternately switched to be positioned through 180 DEG rotation of the feeding switching mechanism 064, the automatic end cover feeding and the manual end cover feeding of the second feeding robot 040 are convenient to be simultaneously carried out, the upper end part of a feeding rod 062 of the feeding level is the end cover feeding level of the second feeding robot 040, when the manual end cover is fed, the end cover is sleeved on the feeding rod 062 and piled on a material placing plate 065 at the lower end of the feeding rod 062, the material placing plate 065 can slide along the feeding rod 062, an end cover feeding mechanism 061 at the feeding level side drives the material placing plate 065 at the side to ascend with fixed feeding amount, the end cover on the feeding rod 062 is pushed to sequentially enter the end cover feeding level, an end cover detecting element is arranged at the end cover feeding level side to monitor the feeding state of the end cover, when the feeding rod 062 feeds back an empty feeding signal to an end cover feeding mechanism 061 driving and feeding switching mechanism 064 after the end cover feeding is completely carried out, the feed switching mechanism 064 switches the feed bars 062.

Specifically, the first feeding robot 030 and the second feeding robot 040 are six-axis robots, and have six degrees of freedom, including in-situ rotary motion, large and small arm motion, and rotation, swing and circular motion of the wrist, so as to transfer among multiple stations and pick and place assembled workpieces at the same time, wherein, as shown in fig. 13, two mechanical clamping jaws 031 symmetrical to the central line of the circular motion of the wrist are installed at the tail end of the wrist of the first feeding robot 030, and as the circular motion of the wrist can support the rotation alternation of the two mechanical clamping jaws 031, the feeding and taking actions of the same station can be realized at the same time; as shown in fig. 15, the wrist end of the second feeding robot 040 is provided with an end cover pneumatic clamping mechanism 041 and a parallel clamping jaw mechanism 026, the parallel clamping jaw mechanism 026 is used for clamping an assembled workpiece for process transfer and finished product offline, the end cover pneumatic clamping mechanism 041 comprises an end surface positioning structure for positioning an end cover upper end surface bulge structure, a pneumatic chuck for adsorbing an end cover upper end surface to take materials and a pneumatic material taking system for providing pneumatic chuck adsorption air pressure, the end cover pneumatic clamping mechanism 041 and the parallel clamping jaw mechanism 026 are arranged up and down and can be driven by wrist circular motion to rotate for overturning, so that the end cover pneumatic clamping mechanism 041 can conveniently take materials from the end cover and feed the end cover after overturning by 180 degrees.

In addition, specifically, a laser marking device is arranged on the laser marking station, the laser marking device comprises a laser marking device in the prior art, a marking piece conveying mechanism 820 extending from the inside of a laser marking bin of the laser marking device to the outside of the laser marking device, and a marking piece positioning seat 810 positioned on the marking piece conveying mechanism 820, wherein the marking piece positioning seat 810 is positioned outside the laser marking bin; the lower line station is provided with a lower line device 070, the lower line device 070 is specifically a lower line conveying belt, the lower line device 070 is arranged on the other side of an inlet of a wet operation area, the lower part of the lower line device 070 can be further provided with a waste bin, and unqualified products of the rigidity detection station are directly transported into the lower line device 070 through a second feeding robot 040, so that quality control and distribution are automatically realized.

It should be noted that, the general control system platform 000 of the production line not only can realize the initial setting by man-machine exchange, but also can electrically connect all the detection elements (workpiece detection element 052, deviation correction detection element 130, end cover detection element, etc.), the drivers of the electric actuating mechanism (feeding transfer assembly 010, discharging transfer assembly 020, rotary driving device 560, etc.), the air path control valve of the pneumatic actuating mechanism (three-jaw clamping mechanism 025, parallel clamping jaw mechanism 026, end cover pneumatic clamping mechanism 041, etc.), the steam generating device, high-pressure air pump, switching valve, etc.), the specific connection means should refer to the above expression, the electric connection is completed by the working sequence among the electric devices, the detailed connection means is known in the art, the detailed description is not performed herein, meanwhile, in the description of the present invention, the parts such as the electric actuating mechanism, the pneumatic actuating mechanism, the steam generating device, the high-pressure air pump, the switching valve, etc. which are not described herein are referred to the above expression, the ordinary person in the present art can configure and purchase according to the prior art, the detailed description of the present invention, the laser printer, etc. can not be used in the corresponding technical specification, and the ordinary skill of the present invention is not referred to the present invention.

Reference herein to "inner", "outer", "upper", "lower", "bottom", "side", and like directional terms are based on the directional or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the apparatus, elements or components indicated to the particular orientation or to be constructed and operated in a particular orientation; furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance;

also, some of the above terms may be used to indicate other meanings besides azimuth or positional relationships, for example, the terms "upper", "inner", etc. may also be used to indicate some kind of dependency or connection relationship in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. An automatic assembly line of hydraulic bushing, its characterized in that: the device comprises an integrated feeding station, a submerged assembling station, a deformation processing station, a cleaning station, a rigidity detection station, a laser marking station, an end cover press-fitting station and a lower line station which are sequentially arranged adjacently, wherein a production device with corresponding functions is arranged on each station, the feeding station and the submerged assembling station are sequentially turned through a feeding transfer assembly positioned right above the feeding station and the submerged assembling station, an assembling workpiece of the submerged assembling station below the feeding transfer assembly is sequentially turned to the deformation processing station through a discharging transfer assembly, the deformation processing station, the cleaning station, the rigidity detection station, the laser marking station, the end cover press-fitting station and the lower line station are sequentially turned through a feeding robot, a steam cleaning device is arranged on the cleaning station, the steam cleaning device comprises a openable steam cover, a cleaning piece positioning structure positioned on the inner central axis of the steam cover and a fluid injection system, the fluid injection system is connected with a steam generating device and a high-pressure air pump through a switching valve pipeline, and the steam flow and the outer surface of the steam generator and a high-speed central axis flow can be sequentially carried out on the workpiece and the steam assembly and a drying hole;

In addition, the cleaning piece rotating mechanism is further arranged, the steam cover comprises a lower steam cover and an upper steam cover, the sealing cover is arranged on the lower steam cover, the upper steam cover is driven by the sealing cover lifting mechanism to lift to realize unsealing action, the cleaning piece rotating mechanism comprises a cleaning seat rotatably arranged at the bottom center of the lower steam cover, a steam pressure head rotatably arranged at the center of the upper steam cover and a rotary driving device for driving the steam pressure head to rotate, the cleaning piece positioning structure is arranged at the upper end of the cleaning seat, and the steam pressure head is in contact connection with the upper end face of the assembled workpiece under the synchronous driving of the sealing cover lifting mechanism so as to transmit rotation angle power; the fluid injection system comprises an upper steam chamber, a lower steam chamber, a plurality of cleaning nozzle assemblies uniformly distributed along the center of the steam chamber, a steam orifice plate communicated with the upper steam chamber and the steam cleaning chamber, a steam orifice table top communicated with the lower steam chamber and the steam cleaning chamber, and a steam pipe positioned right below a central shaft hole of an assembled workpiece, wherein the cleaning nozzle assemblies are fixed in the upper steam chamber and used for cleaning and drying the outer peripheral surface of the assembled workpiece, the steam pipe is communicated with the lower steam chamber, the steam orifice plate is fixedly connected with the upper end of the steam head and synchronously rotates with the steam orifice plate, the steam head is internally provided with annular steam orifices communicated with the upper steam chamber, the steam orifice table top is positioned on the upper end surface of a cleaning seat, the cleaning piece positioning structure comprises a plurality of positioning claws and a plurality of supporting blocks distributed along the center of the cleaning seat, the plurality of supporting blocks are arranged on the steam orifice table top and used for jointly supporting the bottom of the workpiece, and the supporting blocks are positioned on the outer peripheral surface of the assembled workpiece;

In addition, the deformation processing station is provided with a submerged flanging device and an automatic diameter reducing device, the submerged flanging device is arranged in a flanging liquid groove, a material receiving slide rail is arranged in the flanging liquid groove, two travel ends of the material receiving slide rail are respectively provided with a flanging feeding point and a flanging operation point, the submerged flanging device is arranged on the flanging operation point and comprises a lifting flanging mechanism, an upward flanging pressure head and a downward flanging positioning seat, the downward flanging positioning seat can slide along the material receiving slide rail and is immersed in damping liquid, the automatic diameter reducing device comprises a diameter reducing groove and a lifting ejector rod, the ejector rod is vertically arranged in the center of the diameter reducing groove, and the ejector rod and the flanging feeding point are positioned on a discharging track line of the discharging and conveying assembly; the discharging and transferring assembly comprises a discharging and transferring mechanism, a turnover mechanism and a liquid tilting mechanism, wherein the turnover mechanism and the liquid tilting mechanism are arranged on the discharging and transferring mechanism in parallel, the lower end of the turnover mechanism is provided with a parallel clamping jaw mechanism, the turnover mechanism is used for driving the assembled workpiece on the parallel clamping jaw mechanism to turn over 180 degrees, the lower end of the liquid tilting mechanism is provided with a three-jaw clamping mechanism, and the liquid tilting mechanism is used for driving the three-jaw clamping mechanism to roll.

2. The assembly line of claim 1, wherein: the feeding station is provided with a feeding turntable, a plurality of groups of sub-workpiece positioning groups are uniformly distributed on the feeding turntable along the central annular shape of the feeding turntable, each sub-workpiece positioning group comprises an outer pipe positioning seat and an elastic body positioning seat which are positioned on the radial line of the feeding turntable, and two runner plate positioning seats which are symmetrically positioned on two sides of the radial line of the feeding turntable, an embedded groove for positioning the lower end face of the elastic body is formed in the elastic body positioning seat, a middle hole positioning column which is adaptive to a shaft hole in the elastic body is formed in the center of the embedded groove, a plurality of limiting columns are arranged on the runner plate positioning seat, runner plates are inserted and arranged among the limiting columns, and positioning grooves with the inner peripheral face being adaptive to the outer peripheral face structure of the lower end of the outer pipe body are formed in the outer pipe positioning seat.

3. The assembly line of claim 2, wherein: the feeding device comprises a feeding station, a submerged assembly station, a feeding transfer assembly and a feeding control assembly, wherein a feeding transfer turntable is further arranged between the feeding station and the submerged assembly station, a group of sub-workpiece transfer positioning groups are arranged on a longitudinal feeding track line of the feeding transfer assembly, the sub-workpiece transfer positioning groups are identical to the adjacent sub-workpiece positioning groups in structure, the feeding transfer assembly comprises a feeding driving mechanism and a duplex material taking clamping jaw assembly which is driven to lift and longitudinally move by the feeding driving mechanism, the duplex material taking clamping jaw assembly comprises two groups of material taking clamping jaw assemblies which are synchronously lifted, synchronously moved and synchronously clamped, and the material taking clamping jaw assembly comprises an outer pipe mechanical jaw, an elastic mechanical jaw and two runner plate mechanical jaws which are matched with the distribution of the sub-workpiece positioning groups.

4. The assembly line of claim 1, wherein: the rigidity detection station comprises an image positioning device and a rigidity detection device, wherein the image positioning device is used for acquiring an image of the position of a shaft hole key slot in an assembled workpiece and calculating and adjusting the azimuth of the assembled workpiece, the rigidity detection device comprises a detection seat, a middle hole supporting structure used for supporting the assembled workpiece and rigidity detection mechanisms arranged on two sides of the detection seat, the middle hole supporting structure is fixed at the tail end of the vibrating machine and comprises a middle hole positioning column used for positioning the middle shaft hole of the assembled workpiece and an inner key slot of the middle hole positioning column, the detection seat is provided with a detection piece placement hole, the middle hole positioning column is positioned in the detection piece placement hole and is arranged along the central axis of the detection piece placement hole, a guide chute communicated with the detection piece placement hole is further arranged on the detection seat and used for guiding a detection pressing block on the rigidity detection mechanism to apply sliding pressure, and the assembled workpiece is transferred between the image positioning device and the rigidity detection device through the feeding robot.

5. The assembly line of claim 1, wherein: the end cover press-fitting device is arranged on the end cover press-fitting station and comprises a lower positioning seat for positioning the assembly workpiece, an end cover clamping structure for press-fitting the end cover and a press-fitting driving mechanism for driving the end cover clamping structure to press-fit downwards, wherein the end cover clamping structure comprises an end cover pressure head which is adaptive to the inner side surface of the end cover, and the end cover pressure head is magnetically connected with the end cover.

6. The assembly line of claim 5, wherein: the automatic feeding device for the end cover comprises a feeding switching mechanism, a feeding rod, a material placing plate sleeved on the feeding rod and an end cover feeding mechanism, wherein the feeding rod and the material placing position are respectively arranged on two sides of the feeding switching mechanism, the feeding rod and the material placing position are respectively provided with one position, two positions of the feeding rod are alternately switched through rotation of the feeding switching mechanism, the end cover is sleeved on the feeding rod and stacked on the material placing plate, the upper end of the feeding rod is an end cover material taking position, and the feeding mechanism drives the feeding plate at the feeding position to move upwards to push the end cover at the uppermost end of the feeding rod to enter the end cover material taking position.