CN111854650B - Assembly detection device for actuating part piston assembly - Google Patents
Assembly detection device for actuating part piston assembly Download PDFInfo
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- CN111854650B CN111854650B CN202010721190.1A CN202010721190A CN111854650B CN 111854650 B CN111854650 B CN 111854650B CN 202010721190 A CN202010721190 A CN 202010721190A CN 111854650 B CN111854650 B CN 111854650B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
Abstract
The invention discloses an assembly detection device for a piston assembly of an actuating part, which comprises a clamping and positioning module, a screwing module, an adjusting module and a detection module, wherein the adjusting module comprises a guide rail-slide block, a supporting block connected with the slide block, a screw rod and a servo motor; the tail seat piston of the piston assembly is provided with a tail seat, a tail seat and an end ring piston, wherein the tail seat is provided with a tail seat, the tail seat and the tail seat; the detection module is installed on the fixed block and is used for detecting the coaxiality of the piston assembly. The device can ensure that the assembly of the piston assembly meets the process requirements, and the coaxiality of the two parts of the assembly is measured by a quick detection method, so that the assembly quality of the piston assembly is ensured.
Description
Technical Field
The invention relates to the technical field of advanced digital assembly manufacturing and automation, in particular to an assembly detection device for a piston assembly of an actuating part.
Background
The safety, reliability and economical requirements of modern commercial airplanes are high, and the civil airplane which can be put into airline operation needs to pass through the strict approval of relevant civil aviation authorities layer by layer. The civil flight control hydraulic actuating system is one of core systems of modern airplanes as a highly integrated product integrating mechanical, electrical, hydraulic, magnetic, force and control, is concerned with the safety and comfort of the airplanes, and is a subject of key examination by airworthiness authorities. In order to meet the control requirements of different types of airplanes and different parts of the airplanes, the key power execution element actuating cylinder needs to be reliably serviced under severe working conditions of high oil pressure, high temperature difference, low air pressure, strong corrosive media and the like. The method provides more rigorous requirements on the assembly precision and quality stability of the flight control hydraulic actuating part.
Piston screwing is an important step for assembling the flight control hydraulic actuating component, a piston assembly is composed of an end ring piston and a tailstock piston as shown in figure 1, and the assembling process directly influences the reliability and the service life of the actuating component. The assembly process needs to realize the quick screwing of the tailstock piston and the end ring piston, accurately control the screwing torque of the tailstock piston and the end ring piston and ensure the assembly coaxiality of the two piston parts. At present, the piston screwing assembly adopts the modes of manual leading, mechanical assistance and post inspection, and the assembly process of the components is completed by means of manual operation of a craftsman.
With the development of aeronautical technology, the above-mentioned assembly methods gradually reveal 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.
Therefore, in view of the above problems, there is a need to provide a new piston assembly.
Disclosure of Invention
The invention aims to provide an assembly detection device for a piston assembly of an actuating part, which is used for solving the problems in the prior art, so that the assembly of the piston assembly is ensured to meet the process requirements, and the coaxiality of two parts of the piston assembly is measured by a quick detection method, so that the assembly quality of the piston assembly is ensured.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an assembly detection device for a piston assembly of an actuating part, which comprises a clamping and positioning module, a screwing module, an adjusting module and a detection module, wherein the adjusting module comprises a guide rail-slide block, a supporting block connected with the slide block, a screw rod and a servo motor; the spline type ratchet wheel positioning mechanism is arranged on the fixed block, one end of a tailstock piston in the piston assembly is clamped in the spline type ratchet wheel positioning mechanism, the other end of the tailstock piston in the piston assembly is inserted with the mounting end of the end ring piston and then is placed on the middle supporting mechanism, and the other end of the end ring piston is clamped in the three-jaw chuck; the detection module is installed on the fixed block and used for detecting the coaxiality of the piston assembly.
Preferably, the adjusting module comprises an adjusting mounting plate, a screw rod, a sliding block and a first servo motor, the guide rails are arranged on the adjusting mounting plate and located on two sides of the screw rod, the sliding block is fixed with a screw rod nut on the screw rod, the sliding block is slidably mounted on the guide rails, and the first servo motor is used for driving the screw rod to rotate; the supporting block is fixedly arranged at the top of the sliding block and moves synchronously with the sliding block.
Preferably, the spline teeth at one end of the tailstock piston are fixed at the ratchet of the spline type ratchet positioning mechanism through splines.
Preferably, the middle support mechanism comprises two support plates, one of the support plates is arranged on the fixed block and close to the spline-type ratchet positioning mechanism, the other support plate is arranged at the tail end of the guide rail and close to the fixed block, and the heights of the tops of the two support plates are the same.
Preferably, the top of the supporting plate is provided with a V-shaped groove or a U-shaped groove, a flexible contact surface is arranged at the V-shaped groove or the U-shaped groove, and the outer wall surface of the piston assembly is in contact with the flexible contact surface for supporting.
Preferably, the jaws of the three-jaw chuck are provided with flexible contact surfaces, and the other end of the end ring piston in the piston assembly is in contact with the flexible contact surfaces on the three-jaw chuck for clamping.
Preferably, the motor in the tightening module is a servo motor II, and the servo motor II is used for driving the three-jaw chuck on the other side of the supporting block to drive the piston assembly to rotate and tighten.
Preferably, the detection module adopts a laser sensor, the laser sensor is arranged on one side of the fixed block, and the laser sensor is used for measuring the distance change between the outer wall of the piston assembly and the sensor so as to detect the coaxiality of the piston assembly.
Compared with the prior art, the invention has the following beneficial technical effects:
the assembly detection device for the piston assembly of the actuating part disclosed by the invention has the advantages that by designing a proper piston clamping, positioning, screwing and detecting mechanism, the tailstock piston and the end ring piston can be screwed up at a fixed moment required by the process; meanwhile, a corresponding detection structure is designed, and the coaxiality of piston assembly is guaranteed to meet the design requirement. The device can ensure that the assembly of the piston assembly meets the process requirements, and the coaxiality of the two parts of the assembly is measured by a quick detection method, so that the assembly quality of the piston assembly is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed 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 creative efforts.
FIG. 1 is a schematic view of a piston assembly of an actuator;
FIG. 2 is a schematic view of the overall structure of the assembly detection device for the piston assembly of the actuating member;
FIG. 3 is a block diagram of a clamping module;
FIG. 4 is a clamping view of the tightening module and the clamping and positioning module to the piston assembly;
FIG. 5 is a structural composition diagram of a conditioning module;
FIG. 6 is a schematic view of the installation position of the detection module;
wherein, 1 is an end ring piston; 2 tailstock piston; 3, a servo motor I; 4, a sliding block; 5, a guide rail; 6, a second servo motor; 7 a supporting block; 8 a three-jaw chuck; 9 an intermediate support mechanism; 10 spline type ratchet positioning mechanism; 11 a laser sensor; 12 ratchet wheel.
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 assembly detection device for a piston assembly of an actuating part, which is used for solving the problems in the prior art, so that the assembly of the piston assembly is ensured to meet the process requirements, and the coaxiality of two parts of the assembly is measured by a quick detection method, so that the assembly quality of the piston assembly is ensured.
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.
As shown in fig. 1-6, the present invention provides an assembly detection device for a piston assembly of an actuating component, comprising a clamping and positioning module, a tightening module, an adjusting module and a detection module, wherein the adjusting module comprises a supporting block 7 slidably disposed on a guide rail 5, the clamping and positioning module comprises a three-jaw chuck 8, a middle supporting mechanism 9 and a spline-type ratchet positioning mechanism 10, a motor of the tightening module is mounted at the outer side of the supporting block 7, an output shaft of the motor penetrates through the supporting block 7 to be in transmission connection with the three-jaw chuck 8 mounted at the other side of the supporting block 7, and the motor is used for driving the three-jaw chuck 8 to rotate and tightening according to set process parameters; the spline type ratchet wheel positioning mechanism 10 is arranged on the fixed block, one end of a tailstock piston 2 in the piston assembly is clamped in the spline type ratchet wheel positioning mechanism 10, the other end of the tailstock piston is inserted into the mounting end of the end ring piston 1 and then placed on the middle supporting mechanism 9, and the other end of the end ring piston 1 is clamped in the three-jaw chuck 8; the detection module is installed on the fixed block and is used for detecting the coaxiality of the piston assembly.
Specifically, the piston assembly is used for assembling the piston assembly of the actuating part of the airplane steering engine, and as shown in figure 1, the piston assembly can ensure that an end ring piston 1 and a tailstock piston 2 are flexibly clamped, can accurately position, quickly screw the two pistons, and can also carry out coaxiality detection, so that the assembly efficiency of the piston assembly is improved, the consistency of products is ensured, and the labor intensity of workers is reduced.
As shown in figure 2, the assembly detection device for actuating the piston assembly of the component is fixed on a horizontal table top during operation, and is used for screwing the piston assembly of the actuating component of the aircraft steering engine and detecting to finally complete assembly. The three-jaw chuck 8, the middle supporting mechanism 9 and the spline type ratchet positioning mechanism 10 in the clamping and positioning module are respectively provided with protective rubber on each contact surface, the protective rubber is used for clamping the tailstock piston 2 and the end ring piston 1 and positioning the same on the same axis, the rubber on the contact surfaces can protect parts and avoid scratching the parts in the assembling process, meanwhile, the ratchet 12 in the spline type ratchet positioning mechanism 10 can ensure that one end of a piston assembly is fixed in the screwing process, and the piston assembly reversely rotates in a subsequent detection module, so that the coaxiality measurement requirement is met. The tightening module is used for quickly screwing the piston assembly under small torque by driving the three-jaw chuck 8 to rotate by the torque-controllable high-precision servo motor II 6, and the fixed torque tightening is completed according to the torque required by the process; the adjusting module consists of a servo motor I3, a sliding block 4 and a guide rail 5 which are arranged on the adjusting mounting plate, and a system consisting of the sliding block 4, the guide rail 5 and the servo motor I3 can adjust the distance between the spline type ratchet wheel positioning mechanism 10 and the clamping three-jaw chuck 8 so as to meet the requirements of assembling piston assemblies of different models; the detection module increases the laser displacement sensor of high accuracy on the basis of the module of screwing up fast, because spline type ratchet positioning mechanism 10 department has the existence of ratchet 12, the subassembly can direct antiport after the assembly is accomplished, data are gathered through the mode of laser sensor 11 measuring distance for the axiality of measuring piston assembly after the assembly is accomplished.
In this embodiment, the piston assembly is clamped and fixed as follows: the spline teeth at one end of the tailstock piston 2 are fixed at the ratchet wheel 12 of the spline type ratchet wheel positioning mechanism 10 through splines. The intermediate support mechanism 9 includes two support plates, one of which is disposed on the fixed block and close to the spline-type ratchet positioning mechanism 10, the other of which is disposed at the end of the guide rail 5 and close to the fixed block, and the top heights of the two support plates are the same. V type groove or U type groove have been seted up at the top of backup pad, and V type groove or U type groove department are provided with the flexible contact surface, and piston assembly's outer wall and flexible contact surface contact support.
The assembly detection device for the piston assembly of the actuating part has the following working process:
firstly, when assembly work is started, the position of a supporting block 7 is determined according to the type of a piston assembly, the position of the supporting block 7 is adjusted by a sliding block 4, and a servo motor I3 adjusts the position of the sliding block 4 through a screw rod to adapt to piston assemblies of different types.
Secondly, clamping and positioning the piston assembly; after the position of the supporting block 7 is adjusted, the position of the three-jaw chuck 8 is determined. The spline teeth at one end of a piston 2 of the preassembled piston assembly tailstock are clamped with a spline type ratchet wheel positioning mechanism 10, the other end of the piston is clamped through a three-jaw chuck 8, and an intermediate supporting mechanism 9 is used for supporting the piston assembly. The three-jaw chuck 8 and the piston assembly are tightly clamped to realize the subsequent screwing step, the clamping force is controllable, and the clamped part is prevented from rotating and the surface of the part is not damaged. Rubber is wrapped on each jaw of the three-jaw chuck 8, so that the surfaces of parts are prevented from being scratched. The spline on the spline type ratchet positioning mechanism 10 is clamped with the part spline, and the other end of the assembly is fixed. Meanwhile, the ratchet wheel 12 is arranged on the mechanism, so that the mechanism cannot rotate in one direction and plays a role in fixing for screwing, and the mechanism can rotate in the other direction and is used for coaxiality measurement. The middle supporting mechanism 9 plays a supporting role before being screwed down, reduces the stress of the middle connecting thread of the two parts of the piston assembly, protects the thread, prevents the thread from being damaged, and influences the sealing property of the assembly.
And thirdly, screwing down the piston assembly. Under the process requirement of a large rotating speed, quickly screwing the piston assembly to the set small torque by using the small torque; then, the piston assembly is tightened at a low rotational speed using the rated torque required for assembly, completing the piston tightening step. In the whole process, the rotating speed and the torque of the motor are set in the process parameter library, the switching of parameters is automatically carried out, manual operation is not needed, and the model of the piston assembly is input before starting.
And finally, detecting the coaxiality of the piston assembly, wherein the core mechanism of the module is a laser sensor 11, and the rest mechanisms are matched by the aid of the mechanisms described in the specification. The assembled piston assembly is driven to rotate by the second servo motor 6, the rotating direction is opposite to the screwing direction, and due to the existence of the ratchet wheel 12, the process can be completed without additional operation. When the piston assembly rotates, the laser sensor 11 measures the distance between the laser sensor and the outer wall of the piston assembly, and the purpose of measuring the coaxiality is achieved.
In this embodiment, the clamping and positioning module directly contacts with the two pistons, and surface flexibility needs to be increased, so that a part can be clamped and positioned without being scratched by the clamping mechanism; the tightening module needs to take account of both quick tightening and fixed-torque tightening, and needs to rotate quickly under a small torque and then rotate slowly under a large torque; the adjusting module needs to adjust according to the size information of the parts in the process parameter library, so that the adjusting module is ensured to be suitable for assembling parts of different models and specifications; the detection module can rapidly perform nondestructive detection without clamping the part again, and the reliability of part assembly is ensured.
The three-jaw chuck 8 can flexibly adjust the clamping force while rapidly clamping, and meanwhile, a weak rigid flexible object is arranged on the clamping jaw, so that the clamping jaw is prevented from scratching a part, and the part is prevented from being damaged while being clamped. The other end of the clamping mechanism is provided with a spline which corresponds to the spline of the piston, can be rapidly clamped and has the positioning function, and the axis of the part and the axis of the chuck are ensured to be on the same axis.
The tightening module requires to use a proper servo motor to ensure that the rotating speed and the torque are controllable, the rotating speed and the torque are selected according to the piston assembly assembling technological parameters, a proper PLC is required to be selected to control the selected servo motor according to the selected servo motor, and the working parameters are adjusted according to the technological requirements of parts to be assembled, so that the tightening action of the piston assembly is completed, including quick tightening and fixed-moment tightening.
The adjusting module requires to select a proper screw rod, a proper guide rail 5 and a proper sliding block 4, the stroke distance is selected according to the length range of the piston assembly, a proper servo motor is required to be selected according to the selected screw rod, the selected guide rail 5 and the selected sliding block 4, automatic control is realized through a PLC in the screwing module, the fact that the rest modules can be adjusted to working positions is guaranteed, and assembly of parts of different models is completed.
The detection module requires to select a proper laser sensor 11, the measuring range is determined according to the distance between the sensor and the part on the equipment, and the precision is determined according to the coaxiality required by the process, so that the coaxiality measurement of the piston assembly is ensured to be met. Meanwhile, the piston assembly needs to rotate during measurement, the spline type clamping mechanism is required to be connected with the fixed seat through the ratchet wheel 12, the spline type clamping mechanism can rotate fast in the opposite direction of screwing, and coaxiality measurement is achieved.
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, and any reference signs in the claims are not intended to 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 (5)
1. An assembly detection device for an actuator piston assembly, comprising: the clamping and positioning device comprises a clamping and positioning module, a screwing module, an adjusting module and a detection module, wherein the adjusting module comprises a supporting block which is arranged on a guide rail in a sliding manner, the clamping and positioning module comprises a three-jaw chuck, a middle supporting mechanism and a spline type ratchet wheel positioning mechanism, a motor of the screwing module is arranged on the outer side of the supporting block, an output shaft of the motor penetrates through the supporting block and is in transmission connection with the three-jaw chuck arranged on the other side of the supporting block, and the motor is used for driving the three-jaw chuck to rotate; the spline type ratchet positioning mechanism is arranged on the fixed block, one end of a tailstock piston in the piston assembly is clamped in the spline type ratchet positioning mechanism, the spline teeth at one end of the tailstock piston are fixed at the ratchet of the spline type ratchet positioning mechanism through splines, the other end of the tailstock piston is inserted into the mounting end of the end ring piston and then placed on the intermediate support mechanism, and the other end of the end ring piston is clamped in the three-jaw chuck; the detection module is arranged on the fixed block and is used for detecting the coaxiality of the piston assembly;
the adjusting module comprises an adjusting mounting plate, a screw rod, a sliding block and a first servo motor, the guide rails are arranged on the adjusting mounting plate and located on two sides of the screw rod, the sliding block is fixed with a screw rod nut on the screw rod, the sliding block is slidably mounted on the guide rails, and the first servo motor is used for driving the screw rod to rotate; the supporting block is fixedly arranged at the top of the sliding block and moves synchronously with the sliding block;
the middle supporting mechanism comprises two supporting plates, one supporting plate is arranged on the fixed block and close to the spline type ratchet wheel positioning mechanism, the other supporting plate is arranged at the tail end of the guide rail and close to the fixed block, and the heights of the tops of the two supporting plates are the same;
a ratchet wheel in the spline type ratchet wheel positioning mechanism is used for fixing one end of the piston assembly in the screwing process, and reversely rotating the piston assembly in the subsequent detection module to meet the coaxiality measurement requirement;
the assembly detection device for the piston assembly of the actuating part works as follows:
firstly, when assembly work is started, the position of a supporting block is determined according to the type of a piston assembly, the position of the supporting block is adjusted by a slide block, and a first servo motor adjusts the position of the slide block through a screw rod and is adaptive to piston assemblies of different types;
secondly, clamping and positioning the piston assembly, adjusting the position of a supporting block, then determining the position of the three-jaw chuck, clamping the spline teeth at one end of the piston of the tailstock of the preassembled piston assembly with the spline type ratchet positioning mechanism, clamping the other end of the piston of the tailstock of the preassembled piston assembly through the three-jaw chuck, and supporting the piston assembly by the intermediate supporting mechanism;
thirdly, screwing the piston assembly, and quickly screwing the piston assembly to the set small torque by using the small torque at a relatively high rotating speed required by the process; then, the piston assembly is screwed down at a low rotating speed by using the rated torque required by assembly, and the step of screwing down the piston is completed;
finally, the coaxiality of the piston assembly is detected, the assembled piston assembly is driven to rotate by the servo motor II, the rotating direction is opposite to the screwing direction, and due to the existence of the ratchet wheel, the process can be finished without extra operation; when the piston assembly rotates, the laser sensor measures the distance between the laser sensor and the outer wall of the piston assembly, and the purpose of measuring the coaxiality is achieved.
2. An assembly detection apparatus for an actuator piston assembly according to claim 1, wherein: v type groove or U type groove have been seted up at the top of backup pad, V type groove or U type groove department are provided with flexible contact surface, and piston assembly's outer wall and flexible contact surface contact support.
3. An assembly detection apparatus for an actuator piston assembly according to claim 1, wherein: the clamping jaws of the three-jaw chuck are respectively provided with a flexible contact surface, and the other end of the end ring piston in the piston assembly is in contact with and clamped by the flexible contact surfaces on the three-jaw chuck.
4. An assembly detection apparatus for an actuator piston assembly according to claim 1, wherein: and the motor in the screwing module is a servo motor II which is used for driving the three-jaw chuck on the other side of the supporting block to drive the piston assembly to rotate and screw.
5. An assembly detection apparatus for an actuator piston assembly according to claim 1, wherein: the detection module adopts a laser sensor, the laser sensor is arranged on one side of the fixed block, and the laser sensor is used for measuring the distance change between the outer wall of the piston assembly and the sensor so as to detect the coaxiality of the piston assembly.
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| CN113124775B (en) * | 2021-04-16 | 2023-04-07 | 重庆荆江汽车半轴股份有限公司 | Automatic detection robot for surface of vehicle half shaft |
| CN113414583A (en) * | 2021-07-06 | 2021-09-21 | 上海中船临港船舶装备有限公司 | Automatic pipe centering and positioning device and using method thereof |
| CN114083254A (en) * | 2021-11-26 | 2022-02-25 | 中国航空工业集团公司西安飞行自动控制研究所 | Flexible clamping device and method for automatic adjustment of multiple hydraulic actuating cylinders |
| CN114061531B (en) * | 2021-12-02 | 2024-04-02 | 无锡兴惠汽车配件制造有限公司 | Transmission shaft axiality detection device |
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| EP3118569A1 (en) * | 2015-07-13 | 2017-01-18 | Lockheed Martin Corporation | System and method for thread protrusion verification |
| CN105750892A (en) * | 2016-04-07 | 2016-07-13 | 内蒙古工业大学 | Automatic screw assembly-in-place detection system on basis of real-time image processing |
| CN105690076A (en) * | 2016-04-19 | 2016-06-22 | 上海第二工业大学 | Automatic assembling mechanism for spring and rack |
| CN207941988U (en) * | 2018-02-08 | 2018-10-09 | 李文建 | Horizontal lathe for crankshaft machining |
| WO2019221698A1 (en) * | 2018-05-14 | 2019-11-21 | Reel Power Licensing Corp. | Accumulator assembly fixture |
| CN108747291A (en) * | 2018-06-26 | 2018-11-06 | 攀钢集团攀枝花钢钒有限公司 | Roller rapid dismounting apparatus and assembly and disassembly methods |
| CN109015468A (en) * | 2018-09-06 | 2018-12-18 | 山西大学 | A kind of hydraulic cylinder cylinder head body self-adapting flexible assembly equipment |
| CN110779471A (en) * | 2019-12-04 | 2020-02-11 | 北京泓慧国际能源技术发展有限公司 | Coaxiality measuring method, device, equipment and storage medium |
| CN111043208A (en) * | 2019-12-25 | 2020-04-21 | 中北大学 | Assembly device of magnetic damping shock absorber |
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