CN114654426A - Automatic screwing device and screwing method for piston assembly of three-station actuator cylinder - Google Patents
Automatic screwing device and screwing method for piston assembly of three-station actuator cylinder Download PDFInfo
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- CN114654426A CN114654426A CN202210497517.0A CN202210497517A CN114654426A CN 114654426 A CN114654426 A CN 114654426A CN 202210497517 A CN202210497517 A CN 202210497517A CN 114654426 A CN114654426 A CN 114654426A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses an automatic screwing device and method for a three-station actuator cylinder piston assembly, which relate to the technical field of piston assembly and comprise the following steps: the tail-seat-type clamping mechanism comprises a rotating mechanism, a positioning mechanism, a driving mechanism and a clamping assembly, wherein at least one clamping assembly is arranged at each of two ends of a piston of an end ring piston and a tail seat piston, an annular clamping end for limiting a piston rod to generate radial displacement is arranged in each clamping assembly, the annular clamping end is rotationally connected with the piston rod and moves axially along with the piston rod, and the rotating end and the annular clamping end of the rotating mechanism and the positioning end of the positioning mechanism are coaxially arranged; the annular clamping end limits the radial displacement of the piston rod, and the positioning mechanism positions the non-tightening end of the tailstock piston and also plays a role in limiting the radial displacement of the piston rod, namely, the radial displacement of the piston rod is limited at multiple points on the whole piston assembly, so that the assembly accuracy is greatly improved, the thread can be prevented from being damaged, and the service life of the piston assembly is prolonged.
Description
Technical Field
The invention relates to the technical field of piston assembly, in particular to an automatic screwing device and method for a three-station actuator cylinder piston assembly.
Background
The safety, reliability and economic requirements of modern commercial airplanes are high, the civil airplane which can be put into operation on the air route needs to pass through the strict approval of relevant civil aviation authorities layer by layer, a civil flight control hydraulic actuating system is taken as a highly integrated product integrating machines, electricity, liquid, magnetism, force and control, the civil flight control hydraulic actuating system is one of the core systems of the modern airplanes, the civil flight control hydraulic actuating system is concerned with the safety and comfort of the airplane, the civil flight control hydraulic actuating system is a key examination object of the aviation authorities, and in order to meet the control requirements of different types of airplanes and different parts of the airplanes, a key power execution element actuating cylinder of the civil flight control hydraulic actuating system needs to be reliably serviced under the severe working conditions of high oil pressure, high temperature difference, low air pressure, strong corrosive media and the like, and the more strict requirements are provided for the assembly precision and the stability of the assembly quality of flight control hydraulic actuating components (namely the actuating cylinder).
The piston screwing in the airplane actuating cylinder is a crucial step for assembling the flight control hydraulic actuating cylinder, a piston assembly consists of an end ring piston and a tailstock piston, the reliability and the service life of the actuating cylinder are directly influenced by the assembling process, the tailstock piston and the end ring piston need to be quickly screwed in the assembling process to meet the requirement of production takt, the screwing torque of the tailstock piston and the end ring piston is accurately controlled, currently, the piston screwing and assembling adopt a manual leading mode, a mechanical assisting mode and a post inspection mode, and the assembling process of parts and assemblies is completed by means of manual operation of a craftsman.
With the development of aeronautical technology, the above-mentioned assembly methods are increasingly exposed to the following problems:
the matching threads of the two parts are long, the manual tightening efficiency is low, workers need to hold the parts for a long time to perform tightening operation, the labor intensity is high, and continuous work is difficult;
secondly, the piston is difficult to fix in the process of screwing operation and is only held by a hand of a worker, so that the part is easily damaged;
thirdly, the existing fixed-torque tightening tool is inconvenient to operate and needs two persons to complete matching;
and fourthly, the assembly is required to be disassembled after unqualified inspection, and the assembly is selected and assembled again, so that the working efficiency is seriously influenced, and even irreversible damage is caused to the parts.
The invention patent with the application number of '202010811956.5' and the name of 'tightening equipment' discloses a piston tightening device, which comprises a main frame, a tightening mechanism, a clamping mechanism and a lifting mechanism, wherein the tightening mechanism is used for driving a member to be tightened to move, the clamping mechanism is used for clamping a rod member matched with the member to be tightened, the lifting mechanism drives the tightening mechanism to move up and down, a tightening sleeve at the output end of a tightening gun of the tightening mechanism drives the member to be tightened to rotate, the member to be tightened is screwed into the rod member to complete the tightening assembly of a piston, but in the tightening process, the tightening torque cannot be effectively determined, the assembly quality of the piston is influenced, in the tightening process, the movement of the member to be tightened is completely influenced by the tightening mechanism, fine vibration generated in the movement of the tightening mechanism is reflected on the member to be tightened, the fine vibration of the portion influences the assembly precision of the piston and can be hard worn, reducing the service life of the piston.
The invention discloses a piston tightening device, which comprises a bracket, a tightening device and a piston rod fixing device, wherein the bracket is used for fixing and supporting a power device, the tightening device and the piston rod fixing device, the piston rod fixing device is used for fixing and clamping a piston rod in the tightening process, the tightening device is used for driving the nut to be tightened to rotate so as to realize the tightening matching of the nut to be tightened and the piston rod, the piston rod tightening device is also provided with a torsion spring, when the torque for tightening the nut is smaller than the initial torque of the torsion spring, the passive rotating piece and the active rotating piece do not rotate together in a relative rotation mode, when the nut is tightened to a required standard, the torque for tightening the nut is larger than the initial torque of the torsion spring, the relative rotation is generated between the passive rotating piece and the active rotating piece, at the moment, the power supply of a driving motor is cut off, and the driving motor stops rotating, the assembly of the piston is completed with a certain torque, but the vibration generated by the tightening device is directly reflected on the nut to be tightened, so that the assembly precision of the piston is influenced, and the service life of the piston is shortened.
Therefore, an automatic screwing device of a three-position actuator cylinder piston assembly and a screwing method thereof with high assembly precision and long service life are needed.
Disclosure of Invention
The invention aims to provide an automatic screwing device and an automatic screwing method for a three-station actuator cylinder piston assembly, which are used for solving the problems in the prior art, and the device ensures the stability of the piston during screwing, improves the assembly precision and prolongs the service life of the piston assembly by arranging a clamping assembly and a positioning mechanism.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an automatic tightening device of a three-station actuator cylinder piston assembly, which comprises a rotating mechanism for driving a non-tightening end of an end ring piston to rotate, a positioning mechanism for positioning the non-tightening end of a tailstock piston, a driving mechanism for driving the positioning mechanism to move along the piston tightening direction and a clamping assembly, wherein at least one clamping assembly is arranged at each of two ends of the piston of the end ring piston and the tailstock piston, an annular clamping end for limiting a piston rod to generate radial displacement is arranged in the clamping assembly, the annular clamping end is rotationally connected with the piston rod and axially moves along with the piston rod, and the rotating end of the rotating mechanism, the annular clamping end and the positioning end of the positioning mechanism are coaxially arranged.
Preferably, the centre gripping subassembly includes fixed part, rotation portion and locking portion, the one end of fixed part with the rotation portion is articulated, all is provided with the half slot on fixed part and the rotation portion, works as when rotation portion rotates the lock in the fixed part upper end, two half slots concatenations form annular exposed core, the fixed part with rotation portion non-articulated one end is passed through locking portion locks.
Preferably, the clamping assembly further comprises a bushing for protecting the piston rod, the annular clamping end clamps the piston rod through the bushing, the bushing is rotatably connected with the annular clamping end, the bushing clamps the piston rod, and when the piston rod rotates, the bushing does not move relative to the piston rod.
Preferably, an annular groove for preventing the lining from falling off is formed in the inner wall surface of the annular clamping end, an annular connecting portion matched with the annular groove is formed in the lining, and the annular connecting portion is arranged in the annular groove.
Preferably, the material of the lining is red copper.
Preferably, the positioning mechanism comprises a sliding plate and a positioning block arranged on the sliding plate, the positioning block is connected with a non-tightening end spline of the tailstock piston, the bottom of the sliding plate is connected with the driving mechanism, and the clamping assembly is arranged on the sliding plate in a sliding manner.
Preferably, the automatic tightening device further comprises a base, the rotating mechanism and the sliding plate are arranged on the base, a sliding rail is arranged at a position, corresponding to the sliding plate, of the base, the sliding plate is arranged on the sliding rail in a sliding mode, the driving mechanism is arranged below the base, and the driving mechanism is an electric cylinder.
Preferably, the rotating mechanism comprises a driving motor, a speed reducer and a tightening head, the output end of the driving motor is connected with the tightening head through the speed reducer, and the tightening head is the rotating end.
Preferably, a torque sensor is arranged between the speed reducer and the tightening head.
The invention also provides a screwing method of the automatic screwing device of the three-station actuator cylinder piston assembly, which is characterized by comprising the following steps of:
s1: arranging piston rods of an end ring piston and a tailstock piston on an annular clamping end, connecting the tailstock piston with a positioning block, adjusting the position of a sliding plate on a base to enable the non-screwed end of the end ring piston to be close to a screwing head, and connecting the end ring piston and the tailstock piston;
s2: starting a driving motor, starting a tightening head to drive an end ring piston to rotate, controlling a sliding plate to move towards the end ring piston by controlling an electric cylinder, and starting to tighten the piston;
s3: in the tightening process, the torque sensor monitors the tightening torque value in real time and feeds the tightening torque value back to the control system, the tightening torque is adjusted in real time, the accurate control of the torque is realized, and the annular clamping end only ensures that the piston rod only rotates in real time through radial limiting of the piston rod, so that the assembly accuracy is ensured;
s4: and after the screwing operation is completed, taking down the assembled integral piston and transporting the assembled integral piston to a specified position.
Compared with the prior art, the invention has the following technical effects:
1. in the invention, both ends of the end ring piston and the piston of the tailstock piston are respectively provided with at least one clamping assembly, and the clamping assemblies are provided with an annular clamping end for limiting the radial displacement of the piston rod, the arrangement of the annular clamping end limits the radial displacement of the piston rod of the end ring piston and the tailstock piston, thereby avoiding the problems that the piston rod generates radial displacement due to the vibration generated by a rotating mechanism in the screwing process, certain damage is caused to a connecting thread while the assembly accuracy is influenced, and the service life of the piston assembly is influenced, in addition, the rotating end of the rotating mechanism, the annular clamping end and the positioning end of a positioning mechanism are coaxially arranged, the non-screwing end of the tailstock piston is positioned by the positioning mechanism, and the function of limiting the radial displacement of the piston rod can also be realized, namely, the arrangement of the clamping assemblies and the positioning mechanism limits the radial displacement of the piston rod at the same time of multiple points on the whole piston assembly, the assembly accuracy is greatly improved, the threads can be guaranteed not to be damaged, and the service life of the piston assembly is prolonged.
2. According to the piston assembly, the piston rod is clamped by the annular clamping end through the bushing, the bushing is rotatably connected with the annular clamping end and clamps the piston rod, when the piston rod rotates, the bushing and the piston rod do not move relatively, so that the rotary abrasion of the clamped part of the piston rod is eliminated, and the quality of the piston assembly is ensured.
3. According to the invention, the clamping assembly is arranged on the sliding plate in a sliding manner, when the piston assembly faces to piston assemblies with different sizes, the position of the clamping assembly can be adjusted when the piston assembly is clamped, so that the position of the clamping assembly can be adapted to the piston assemblies with different sizes, and the application range of the device is improved.
4. According to the invention, the torque sensor is arranged between the speed reducer and the tightening head, and the tightening torque can be obtained through the torque sensor, so that the precise control of the tightening torque can be realized, and the assembly precision is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a piston assembly of the present invention;
FIG. 2 is a schematic structural view of the automatic tightening apparatus for a three-position ram piston assembly of the present invention;
FIG. 3 is a schematic view of the connection between the clamping assembly and the slide plate according to the present invention;
FIG. 4 is a schematic view of the connection between the slide plate and the driving mechanism according to the present invention;
wherein, 1, end ring piston; 2. a tailstock piston; 3. a drive motor; 4. a speed reducer; 5. a torque sensor; 6. tightening a head; 7. a sliding plate; 8. a clamping assembly; 9. a bushing; 10. a slider; 11. positioning blocks; 12. a drive mechanism; 13. a slide plate; 14. a slide rail.
Detailed Description
The technical solutions in 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 obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an automatic screwing device and an automatic screwing method for a three-station actuator cylinder piston assembly, which are used for solving the problems in the prior art, and the device ensures the stability of the piston during screwing, improves the assembly precision and prolongs the service life of the piston assembly by arranging a clamping assembly and a positioning mechanism.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1 to 4, an automatic tightening device for a three-station actuator piston assembly is provided, which includes a rotating mechanism for driving a non-tightening end of an end ring piston 1 to rotate, a positioning mechanism for positioning a non-tightening end of a tailstock piston 2, a driving mechanism 12 for driving the positioning mechanism to move along a piston tightening direction, and a clamping assembly 8, wherein the rotating mechanism is detachably connected to the non-tightening end of the end ring piston 1, the positioning mechanism is detachably connected to the non-tightening end of the tailstock piston 2, at least one clamping assembly 8 is disposed at each of two ends of the piston of the end ring piston 1 and the tailstock piston 2, a middle portion of a piston rod at one side of the piston is selectively disposed, an annular clamping end for limiting radial displacement of the piston rod is disposed in the clamping assembly 8, the annular clamping end is rotatably connected to the piston rod and axially moves along with the piston rod, the annular clamping end is disposed to limit radial displacement of the piston rods of the end ring piston 1 and the tailstock piston 2, the problems that the piston rod generates radial displacement due to vibration generated by a rotating mechanism in the screwing process, assembly accuracy is influenced, meanwhile, certain damage is caused to connecting threads, and the service life of a piston assembly is influenced are solved, the rotating end, the annular clamping end and the positioning end of a positioning mechanism of the rotating mechanism are coaxially arranged, the positioning mechanism positions the non-screwing end of a tailstock piston 2 and can also play a role of limiting the piston rod to generate radial displacement, namely, the clamping assembly 8 and the positioning mechanism are arranged, the piston rod is limited to generate radial displacement at multiple points on the whole piston assembly at the same time, assembly accuracy is greatly improved, thread damage can be guaranteed, the service life of the piston assembly is prolonged, the rotating mechanism drives an end ring piston 1 to rotate, and a driving mechanism 12 drives the positioning mechanism to drive the tailstock piston 2 to axially move towards the end ring piston 1, the assembly of the end ring piston 1 with the tailstock piston 2 is completed.
The piston assembly can be clamped by the clamping assembly 8 and positioned by the positioning mechanism in a pre-tightened state.
For the convenience of the piston assembly that the centre gripping needs to be screwed up and dismantle the piston assembly who accomplishes the screw up, centre gripping subassembly 8 includes the fixed part, rotation portion and locking portion, the one end of fixed part is articulated with rotation portion, all be provided with the half slot on fixed part and the rotation portion, when rotation portion rotates the lock when the fixed part upper end, two half slots concatenations form annular exposed core, the fixed part is locked through locking portion with rotation portion non-articulated one end, put into the half slot of fixed part with piston assembly's piston rod during the installation, lock rotation portion, and utilize locking portion locking fixed part and rotation portion, accomplish the centre gripping to piston assembly, when needing to dismantle, only need take off locking portion, open rotation portion can, wherein locking portion can be for the locking bolt.
Because the piston rod can cause certain damage to the surface of the piston rod when rotating relative to the annular clamping end, in order to avoid the occurrence of the condition of damaging the piston rod, the clamping assembly 8 further comprises a bush 9 for protecting the piston rod, the annular clamping end clamps the piston rod through the bush 9, the bush 9 is rotatably connected with the annular clamping end, the bush 9 clamps the piston rod, when the piston rod rotates, the bush 9 and the piston rod do not move relative to each other, the bush 9 replaces the piston rod to rotate relative to the annular clamping end, the rotary abrasion of the clamped part of the piston rod is eliminated, and the quality of the piston assembly is favorably ensured.
Because bush 9 is in the state of hugging closely with the piston rod, and bush 9 rotates with annular clamping end and is connected, in order to avoid during piston assembly axial motion, bush 9 deviates from in the annular clamping end, is provided with the ring channel that prevents bush 9 and drop on the internal face of annular clamping end, be provided with on bush 9 with ring channel assorted annular connecting portion, annular connecting portion set up in the ring channel.
The section of the annular groove can be T-shaped or trapezoidal, and the connection stability of the lining 9 and the annular clamping end is enhanced.
In order to reduce wear of the bushing 9, lubricating oil may be added in the annular groove.
Because the piston rod need carry out axial motion screwing up the in-process, the condition that bush 9 and piston rod produced micro relative movement appears probably to appear, and then the piston rod of probably wearing and tearing, in order to guarantee the quality of piston rod, the lower red copper of hardness is selected for use to the material of bush 9, when guaranteeing certain power of hugging closely, can appear at bush 9 and piston rod's relative movement, protects the surface of piston rod.
Positioning mechanism includes slide 13 and sets up locating piece 11 on slide 13, tailstock piston 2's non-tightening end is provided with the flower tooth, locating piece 11 and tailstock piston 2's non-tightening end splined connection, be convenient for installation and dismantlement, slide 13's bottom is connected with actuating mechanism 12, centre gripping subassembly 8 slides and sets up on slide 13, when facing not unidimensional piston assembly, can be when centre gripping piston assembly, adjust centre gripping subassembly 8's position, make centre gripping subassembly 8's position can the not unidimensional piston assembly of adaptation, the application scope of this device has been improved.
The clamping assembly 8 and the sliding plate 13 are in a sliding assembly structure: the sliding plate 13 is provided with two sliding plates 7, the opposite surfaces of the two sliding plates 7 are provided with sliding grooves, the bottom of the fixing part is arranged between the two sliding plates 7, and the bottom of the fixing part is provided with a sliding block 10 corresponding to the sliding grooves.
Automatic screw up device still includes the base, the upper surface level of base sets up, rotary mechanism and slide 13 all set up on the base, and the base corresponds the position of slide 13 and is provided with slide rail 14, slide 13 slides and sets up on slide rail 14, actuating mechanism 12 sets up in the base below, it occupies to the ascending space of contralateral direction to reduce, be favorable to providing the bigger operating space of operating personnel, the position that corresponds actuating mechanism 12 drive end motion route on the base sets up the opening, slide 13's tip is provided with the part of buckling downwards, this part passes the opening and is connected with actuating mechanism 12 drive end, actuating mechanism 12 is electronic jar.
The rotating mechanism comprises a driving motor 3, a speed reducer 4 and a tightening head 6, the driving motor 3 is a servo motor, the output end of the servo motor is connected with the tightening head 6 through the speed reducer 4, the tightening head 6 is a rotating end, the non-tightening end of the end ring piston 1 is provided with spline teeth, and the tightening head 6 is in spline connection with the non-tightening end of the end ring piston 1, so that the disassembly and the assembly are convenient.
A torque sensor 5 is arranged between the speed reducer 4 and the tightening head 6, the speed reducer 4 and the tightening head 6 are both connected with the torque sensor 5 through a coupler, tightening torque can be obtained through the torque sensor 5, accurate control over the tightening torque can be achieved, and assembly accuracy is improved.
The driving motor 3, the speed reducer 4, the torque sensor 5 and the tightening head 6 are all supported on the base through a supporting seat.
The invention also provides a screwing method of the automatic screwing device of the three-station actuator cylinder piston assembly, which comprises the following steps:
s1: the piston rods of the end ring piston 1 and the tailstock piston 2 are arranged on the annular clamping end through the matching of the fixed part and the rotating part, the non-tightening end of the tailstock piston 2 is close to the positioning block 11 through adjusting the position of the clamping assembly 8 on the sliding plate 13, the tailstock piston 2 is connected with the positioning block 11, and the non-tightening end of the end ring piston 1 is close to the tightening head 6 through adjusting the position of the sliding plate 13 on the base through an electric cylinder and is connected with the tightening head 6;
s2: starting the driving motor 3, driving the end ring piston 1 to rotate by the tightening head 6, and limiting the radial movement of the piston rod by the annular clamping end and the positioning block 11, so that even if the driving motor 3 generates vibration, the vibration cannot cause the radial movement of the piston rod when being transmitted to the piston rod, and the end ring piston 1 and the tailstock piston 2 only generate relative movement in the axial direction when being assembled, at the moment, the sliding plate 13 is controlled to move towards the end ring piston 1 by controlling the electric cylinder, the piston is tightened, step-by-step tightening is adopted for improving the working efficiency when in tightening operation, the piston assembly is quickly tightened to the set small torque by using the small torque at the larger rotating speed required by the process, and then the piston assembly is tightened at the small rotating speed by using the rated torque required by the assembly;
s3: in the tightening process, the torque sensor 5 monitors a tightening torque value in real time and feeds the tightening torque value back to the control system, the tightening torque is adjusted in real time, accurate control of the torque is achieved, the annular clamping end limits the radial direction of the piston rod, the piston rod is guaranteed to rotate only in real time, and assembly accuracy is guaranteed;
s4: and after the screwing operation is finished, opening the rotating part, and taking down the assembled integral piston and transporting the assembled integral piston to a specified position.
The adaptation according to the actual needs is within the scope of the invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The automatic screwing device for the piston assembly of the three-station actuator cylinder is characterized by comprising a rotating mechanism, a positioning mechanism, a driving mechanism and a clamping assembly, wherein the rotating mechanism is used for driving a non-screwing end of an end ring piston to rotate, the positioning mechanism is used for positioning the non-screwing end of a tailstock piston, the driving mechanism is used for driving the positioning mechanism to move along the piston screwing direction, at least one clamping assembly is arranged at each of two ends of the piston of the end ring piston and the tailstock piston, an annular clamping end for limiting a piston rod to generate radial displacement is arranged in each clamping assembly, the annular clamping end is rotatably connected with the piston rod and moves axially along with the piston rod, and the rotating end of the rotating mechanism, the annular clamping end and the positioning end of the positioning mechanism are coaxially arranged.
2. The automatic tightening device of a three-position actuator-cylinder piston assembly according to claim 1, wherein the clamping assembly comprises a fixed portion, a rotating portion and a locking portion, one end of the fixed portion is hinged to the rotating portion, semi-circular grooves are formed in the fixed portion and the rotating portion, when the rotating portion is rotatably fastened to the upper end of the fixed portion, the two semi-circular grooves are spliced to form the annular clamping end, and the fixed portion and the non-hinged end of the rotating portion are locked by the locking portion.
3. The automatic tightening device of a three-position actuator piston assembly of claim 2, wherein the clamping assembly further comprises a bushing for protecting the piston rod, the annular clamping end clamps the piston rod via the bushing, the bushing is rotatably coupled to the annular clamping end, the bushing clamps the piston rod, and when the piston rod rotates, no relative movement occurs between the bushing and the piston rod.
4. The automatic tightening device of a three-position actuator cylinder piston assembly according to claim 3, wherein an annular groove for preventing the bush from falling off is formed in an inner wall surface of the annular clamping end, and an annular connecting portion which matches the annular groove is formed in the bush and is disposed in the annular groove.
5. The automatic tightening device for a three-position ram piston assembly of claim 3, wherein the bushing is formed of copper.
6. The automatic tightening device of a three-position actuator-cylinder piston assembly according to claim 1, wherein the positioning mechanism comprises a slide plate and a positioning block disposed on the slide plate, the positioning block is splined to the non-tightening end of the tailstock piston, the bottom of the slide plate is connected to the driving mechanism, and the clamping assembly is slidably disposed on the slide plate.
7. The automatic tightening device of a three-position actuator cylinder piston assembly according to claim 6, further comprising a base, wherein the rotating mechanism and the sliding plate are both disposed on the base, a sliding rail is disposed on the base at a position corresponding to the sliding plate, the sliding plate is slidably disposed on the sliding rail, the driving mechanism is disposed below the base, and the driving mechanism is an electric cylinder.
8. The automatic tightening apparatus of a three-position ram piston assembly according to claim 1, wherein the rotation mechanism includes a drive motor, a speed reducer, and a tightening head, an output of the drive motor being connected to the tightening head through the speed reducer, the tightening head being the rotating end.
9. The automatic tightening device of a three-position ram piston assembly according to claim 8, wherein a torque sensor is provided between the speed reducer and the tightening head.
10. A screwing method of an automatic screwing device of a three-station actuator cylinder piston assembly is characterized by comprising the following steps:
s1: arranging piston rods of an end ring piston and a tailstock piston on an annular clamping end, connecting the tailstock piston with a positioning block, adjusting the position of a sliding plate on a base to enable the non-screwed end of the end ring piston to be close to a screwing head, and connecting the end ring piston and the tailstock piston;
s2: starting a driving motor, starting a tightening head to drive an end ring piston to rotate, controlling a sliding plate to move towards the end ring piston by controlling an electric cylinder, and starting to tighten the piston;
s3: in the tightening process, the torque sensor monitors the tightening torque value in real time and feeds the tightening torque value back to the control system, the tightening torque is adjusted in real time, the accurate control of the torque is realized, and the annular clamping end only ensures that the piston rod only rotates in real time through radial limiting of the piston rod, so that the assembly accuracy is ensured;
s4: and after the screwing operation is completed, taking down the assembled integral piston and transporting the assembled integral piston to a specified position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210497517.0A CN114654426B (en) | 2022-05-09 | 2022-05-09 | Automatic screwing device and screwing method for three-station actuator cylinder piston assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210497517.0A CN114654426B (en) | 2022-05-09 | 2022-05-09 | Automatic screwing device and screwing method for three-station actuator cylinder piston assembly |
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| CN114654426A true CN114654426A (en) | 2022-06-24 |
| CN114654426B CN114654426B (en) | 2023-04-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246026A (en) * | 1988-03-28 | 1989-10-02 | Nissan Motor Co Ltd | Thread member tightening device |
| CN103170903A (en) * | 2011-12-20 | 2013-06-26 | 苏州信能精密机械有限公司 | Honing machine hydraulic clamping device |
| CN103775004A (en) * | 2012-11-27 | 2014-05-07 | 贵州高峰石油机械股份有限公司 | Method for preventing bidirectional hydraulic shock absorber from being released and shock absorber |
| CN204748459U (en) * | 2015-05-14 | 2015-11-11 | 重庆延锋江森汽车部件系统有限公司 | Support arrangement for electricity is criticized fixture and is had this fixture |
| CN214722072U (en) * | 2021-01-15 | 2021-11-16 | 玉环方博机械有限公司 | Hydraulic piston rod's equipment of screwing up |
| CN215470776U (en) * | 2021-08-30 | 2022-01-11 | 武汉鑫贝克科技发展有限责任公司 | Bearing is demolishd and is used fixing device who has scratch damage structure |
| CN216030577U (en) * | 2021-06-23 | 2022-03-15 | 中国航空工业集团公司西安飞行自动控制研究所 | Universal piston torque tightening assembly table |
-
2022
- 2022-05-09 CN CN202210497517.0A patent/CN114654426B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246026A (en) * | 1988-03-28 | 1989-10-02 | Nissan Motor Co Ltd | Thread member tightening device |
| CN103170903A (en) * | 2011-12-20 | 2013-06-26 | 苏州信能精密机械有限公司 | Honing machine hydraulic clamping device |
| CN103775004A (en) * | 2012-11-27 | 2014-05-07 | 贵州高峰石油机械股份有限公司 | Method for preventing bidirectional hydraulic shock absorber from being released and shock absorber |
| CN204748459U (en) * | 2015-05-14 | 2015-11-11 | 重庆延锋江森汽车部件系统有限公司 | Support arrangement for electricity is criticized fixture and is had this fixture |
| CN214722072U (en) * | 2021-01-15 | 2021-11-16 | 玉环方博机械有限公司 | Hydraulic piston rod's equipment of screwing up |
| CN216030577U (en) * | 2021-06-23 | 2022-03-15 | 中国航空工业集团公司西安飞行自动控制研究所 | Universal piston torque tightening assembly table |
| CN215470776U (en) * | 2021-08-30 | 2022-01-11 | 武汉鑫贝克科技发展有限责任公司 | Bearing is demolishd and is used fixing device who has scratch damage structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114654426B (en) | 2023-04-25 |
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