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36results about How to "Restore size" patented technology

Device and method for additive manufacturing and subtractive manufacturing repairing of steel rail by combining laser cladding with machining

ActiveCN110080049AImproving the Efficiency of Online Laser Cladding RepairGuaranteed repair qualityRailway track constructionMulti axisMachining
The invention discloses a device for additive manufacturing and subtractive manufacturing repairing of a steel rail by combining laser cladding with machining. The device is characterized in that thedevice comprises a laser cladding and machining material increasing and decreasing moving carrier (1) and motion executing components (2 and 2') arranged on the laser cladding and machining material increasing and decreasing moving carrier (1), the motion executing components (2 and 2') are each of a multi-axis mechanism, laser cladding machining heads (26) and machining heads (27) of the motion executing components (2 and 2') are mounted on the same axis in the multi-axis mechanism, by moving and rotationally adjusting the position and the posture, the laser cladding machining heads (26) conduct laser cladding machining on different parts of the steel rail (40), and then the machining heads (27) conduct machining on different normal angles of all cladding channels. According to the device, integrated additive manufacturing and subtractive manufacturing steel rail repairing combining laser cladding with machining is achieved, universality is high, and the device can adapt to laser cladding material increasing repairing and machining such as milling, polishing or grinding of steel rails abraded in different situations.
Owner:HUAZHONG UNIV OF SCI & TECH +1

Rock fracturing physical simulation system and test method

The invention provides a rock fracturing physical simulation system and a test method and belongs to the technical field of rock physical simulation tests. The rock fracturing physical simulation system comprises a main body frame, a rock sample room for accommodating to-be-measured rock samples, an axial pressure device, a radial pressure device, an annular confining pressure device connected with the radial pressure device and applying a circumferential pressure to the to-be-measured rock samples, and a fluid conveying device for injecting fracturing fluid into the rock sample room. The invention also provides the test method of the rock fracturing physical simulation system. The test method comprises the following steps: loading a to-be-measured rock sample, applying an axial pressure and an annular confining pressure, injecting the fracturing fluid to break the rock sample, re-solidifying the broken rock sample, and scanning the solidified rock sample. Compared with the prior art,the rock fracturing physical simulation system and the test method provided by the invention truly restore the distribution and magnitude of ground stress, comprehensively simulate the stress state during rock fracturing, and provide reliable data for analyzing the mechanical properties and fracturing effect of rock.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)

Method and device for correcting drum waist deformation during rolling of cylindrical body

The invention belongs to the field of manufacturing of machinery, in particular to a method and device for correcting drum waist deformation during rolling of a cylindrical body. The device comprises two symmetrical arc-shaped components, an adjusting bolt and a working bolt, wherein the symmetrical arc-shaped components are hinged with each other through a connecting sheet to form a clamp-shapedstructure. The correcting method comprises the following steps of: sleeving the device into the cylindrical body, wherein the opening of the cylindrical body faces the hinged position of the two arc-shaped components; making the two arc-shaped components cling to the cylindrical body by adjusting a nut on the adjusting bolt; and applying pressure to the drum waist deformation position of the cylindrical body opening by adjusting the screwing depth of the working bolt to restore the drum waist position to a designed size. By adopting of the method and the device, the drum waist deformation during rolling of the cylindrical body is corrected in a semi-mechanical way instead of a purely manual knocking way, so that the workpiece size can be recovered accurately, the workpiece welding qualityis improved, the labor intensity of workers is lowered, the production efficiency is increased, noise pollution is avoided, and a good effect is achieved.
Owner:CRRC ZIYANG CO LTD

Flat knitting machine for knitting cylindrical knitted fabric and method of knitting cylindrical knitted fabric

The present invention provides a flat knitting machine for knitting cylindrical knitted fabric having un-conspicuous boundaries and a method of knitting cylindrical knitted fabric. The knitting width is reduced when knitting needles (13, 14) cast off and are transferred to a mouth (18), therefore an old coil (25) from a knitting needle (13) of the end of the knitting width is shrank in a mode of being bias from a new coil (21) toward the inner side of the knitting width, if the position of an expansion component (15) is arranged to be identical with that of the old coil (25), the frontend of the expansion component (15) is capable of entering into the mouth (18) and is inserted into the old coil (25), if the shape of the frontend of the expansion component (15) is designed to be a taper shape which is thin and has a small variation of diameter, the frontend can be easily inserted into the old coil (25) for expanding the old coil (25) gradually, and even through being reduced, the sizeof a new coil (21) finally formed by reversing the direction of supplying knitting yarn (20) can be recovered through the expending of the expansion component (15) by transferring the front end of the expansion component to the mouth (18) to form the old coil (25) after round knitting.
Owner:SHIMA SEIKI MFG LTD

Shaft seal installation tool and installation method

The invention discloses a shaft seal installation tool and a shaft seal installation method. The shaft seal installation tool is characterized in that an installation ring comprises a radial supporting surface, an axial supporting surface and an inner hole conical surface; the outer diameter of the axial supporting surface is greater than the minimum inner diameter of the inner hole conical surface, and the width of the axial supporting surface is greater than the cross section diameter of a seal ring; and the minimum inner diameter of the inner hole conical surface is matched with a predetermined seal size of the seal ring and slightly greater than the outer diameter of a shaft required to be installed with the seal ring. The installation ring further can form a combined installation tool together with a guide ring. During installation, the seal ring is used for sleeving the axial supporting surface of the installation ring directly or through the guide ring, the installation ring is moved to the left side of a seal groove in the shaft, the seal ring is pushed in the seal groove, the installation ring is taken out reversely, and the inner hole conical surface is extruded for enabling the expanded and deformed seal ring to be recovered in size; and by repeating the steps, a plurality of seal rings can be installed. By applying the shaft seal installation tool and installation method, the seal rings can be conveniently installed and the cutting damage of the seal rings during subsequent parts assembly can be prevented.
Owner:张辉

Regeneration repair method for tubular parts of die-casting machine

The invention discloses a regeneration repair method for tubular parts of a die-casting machine. The regeneration repair method comprises the steps that bearizing is conducted, i.e., wear portions of the old tubular parts are eliminated through a turning lathe or a grinding tool; welding is conducted, i.e., the portions eliminated after the tubular parts are abraded are repaired with a bead welding method by adoption of an inner diameter automatic welding device; machining is conducted, i.e., the turning lathe and a grinder are reused for deep machining, so that the tubular parts are restored to be in an original size or a size required according to an original drawing; and surface treatment is conducted, i.e., nitrogen treatment is conducted on the surfaces of the tubular parts after regeneration repair, and the whole repair process is completed. According to the regeneration repair method for the tubular parts of the die-casting machine, by means of the independently developed special inner diameter welding technology, the bead weld regeneration repair becomes possible, the bead welding method is used for welding repair, and the tubular parts can be restored to be in the original size. The tube regeneration cost is 60-80% that of new products, regeneration can be conducted for three to five times, the cost can be effectively reduced, the repaired tubular parts are same as or longer than the new products in service life, and the regeneration repair is economical and protects the environment.
Owner:上海环方佐鸣工贸有限公司

Treatment structure of shield tunnel operation period over-limit convergence deformation and construction method thereof

The invention discloses a treatment structure of shield tunnel operation period over-limit convergence deformation and a construction method thereof. The structure comprises bag expansion type prestressed anchor rods, a waterproof layer, annular steel beams, longitudinal steel beams and diagonal bracing trusses. The contact area of the bag expansion type prestressed anchor rods and surrounding soil of a shield tunnel is increased through expansion type bags, so that the pulling resistance is increased; the prestress of the bag expansion type prestressed anchor rods which are symmetrically arranged on the section of the shield tunnel and the counterforce of jacks of the diagonal bracing trusses are applied cooperatively, so that the over-limit convergence deformation of the section of the shield tunnel can be efficiently treated, and the operation of the shield tunnel can be recovered as soon as possible; and after the section of the shield tunnel returns to normal, the bag expansion type prestressed anchor rods continues to be used normally so as to effectively serve the convergence deformation prevention and control in the whole life cycle of the operation period of the shield tunnel.
Owner:江苏中车城市发展有限公司 +2

A control structure and construction method for overrun convergence deformation of shield tunnel during operation period

The invention discloses a control structure and a construction method for over-limit convergence deformation of a shield tunnel during the operation period. The structure includes a bag-expanded prestressed anchor rod, a waterproof layer, a circumferential steel beam, a longitudinal steel beam, and a paired truss ;The contact area between the expanded bladder prestressed anchor rod and the surrounding soil layer of the shield tunnel is increased by the enlarged bladder, and the pull-out resistance is increased. The expanded bladder prestressed anchor rod symmetrically arranged on the section of the shield tunnel The application of the prestressing force and the application of the jack reaction force to the support truss, the two work together, can effectively control the over-limit convergence deformation of the section of the shield tunnel, and resume the operation of the shield tunnel as soon as possible; after the section of the shield tunnel returns to normal, the capsule The expanded prestressed anchor will continue to be used normally, effectively serving the prevention and control of convergence deformation during the entire life cycle of the shield tunnel in operation.
Owner:江苏中车城市发展有限公司 +2

Repair method of airplane hydraulic system aluminum alloy piston rod wear-resisting layer damage

The invention relates to a repair method of airplane hydraulic system aluminum alloy piston rod wear-resisting layer damage. The repair method comprises the following specific steps: removing an old film layer on an aluminum alloy piston rod through an alkali corrosion method; checking whether corrosion, gouges, scratches, abrasion and other damage exist on the surface of an aluminum alloy pistonrod base body or not in a visual mode, and eliminating the existing damage; and measuring the size of the excircle surface of the piston rod, calculating the thickness size, and increasing the thickness of a spraying coating by 1-2mm on the thickness size. The repair method has the advantages that on the basis of an existing repair method, the repair technology and process are optimized, a cold spraying additive manufacturing working procedure is added, the size recovery of the piston rod is achieved through cold additive forming operation, hard anodizing of the coating is carried out on the basis, then a film layer is sealed through a hole sealing technology, and the sealing performance of the film layer is further improved. The problem that the size of the piston rod is reduced after theold film layer is removed through alkali corrosion and hard anodizing is conducted again in the traditional repair process is solved.
Owner:国营芜湖机械厂

Method and device for correcting drum waist deformation during rolling of cylindrical body

The invention belongs to the field of manufacturing of machinery, in particular to a method and device for correcting drum waist deformation during rolling of a cylindrical body. The device comprises two symmetrical arc-shaped components, an adjusting bolt and a working bolt, wherein the symmetrical arc-shaped components are hinged with each other through a connecting sheet to form a clamp-shapedstructure. The correcting method comprises the following steps of: sleeving the device into the cylindrical body, wherein the opening of the cylindrical body faces the hinged position of the two arc-shaped components; making the two arc-shaped components cling to the cylindrical body by adjusting a nut on the adjusting bolt; and applying pressure to the drum waist deformation position of the cylindrical body opening by adjusting the screwing depth of the working bolt to restore the drum waist position to a designed size. By adopting of the method and the device, the drum waist deformation during rolling of the cylindrical body is corrected in a semi-mechanical way instead of a purely manual knocking way, so that the workpiece size can be recovered accurately, the workpiece welding qualityis improved, the labor intensity of workers is lowered, the production efficiency is increased, noise pollution is avoided, and a good effect is achieved.
Owner:CRRC ZIYANG CO LTD

Vision-based unmanned aerial vehicle landing attitude estimation method

A vision-based unmanned aerial vehicle landing attitude estimation method uses a clustering technology to identify runway marks, uses an edge detector and feature detection transformation to verify whether the marks are located at a recovery target, uses an optimizer to match the detected marks with coordinates in a three-dimensional space, and uses a three-dimensional space to estimate the landing attitude of the unmanned aerial vehicle. Using nonlinear transformation and a projection solver to observe the position and direction of the camera, and using an extended Kalman filter to obtain optimal attitude estimation; target images, corner marker colors, edge colors, and runway target geometry are input, an onboard camera will provide images, and attitude estimates will be passed to a camera controller and an automatic landing controller, the former being used to adjust the angle of view.
Owner:丁莹莹
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