7results about How to "Large diameter range" patented technology

The utility model discloses a mechanical large-diameter thread outer diameter measuring device, which comprises a bottom plate, and two positioning sliding rods and two measuring sliding rods which are arranged on the bottom plate, and the two positioning sliding rods can move relatively along the upper surface of the bottom plate, so that the two positioning sliding rods are close to each other to radially clamp a boss of a workpiece to be measured. The two measuring sliding rods can move relatively along the upper surface of the bottom plate, so that the two measuring sliding rods are close to each other and respectively cling to two sides of a thread of a to-be-measured workpiece, scale marking lines are arranged on the upper surface of the bottom plate, and the lower ends of the measuring sliding rods are aligned with the scale marking lines. The length limit of an outer measuring claw of a vernier caliper is broken through, the large-diameter thread diameter measuring device is suitable for measuring the outer diameter of a large-diameter thread, the measurable thread diameter range is wide, the large-diameter thread diameter measuring device is particularly suitable for batch detection of a production line, personal errors are reduced through a positioning sliding rod and scale marks, the measuring precision and stability are improved, only three steps of fixing, pulling and reading are needed during operation, the single-time measuring time is short, and the efficiency is improved. The operation process is simplified, and stable fixation, automatic adaptation and rapid reading are achieved.

The utility model relates to the technical field of drilling, in particular to a drilling device which comprises a machine frame, a drilling machine device and two clamping mechanisms are arranged on the machine frame, the two clamping mechanisms are clamped at the two ends of a workpiece respectively, each clamping mechanism comprises a support, a pressing block and three clamping parts, the clamping parts are installed on the support and the pressing block respectively, and the three clamping parts are connected with the drilling machine device. A workpiece is arranged between the support and the pressing block and clamped through clamping parts, the clamping parts are evenly distributed around the workpiece, the clamping mechanism further comprises a lifting device, the lifting device is installed on the machine frame and connected with the pressing block, and an internal waste collecting device is arranged on one side of the clamping mechanism and can slide in the workpiece. And waste materials in the pipe during drilling are collected. According to the drilling device, waste materials in a pipeline can be effectively and conveniently cleaned away, meanwhile, any damage to the inner wall of the pipeline is avoided, the drilling device further has the automatic pipeline feeding function, the labor intensity of workers is remarkably relieved, and the production efficiency is greatly improved.

The utility model discloses a chuck is with multisection double -cylinder air cylinder belongs to air cylinder technical field, and it aims at solving the problem of existing chuck double -cylinder air cylinder stroke is limited, and the single clamping force leads to the narrow adaptation range, and the thin -walled pipe is easy to deform. The air cylinder includes cylinder body, and two first piston cavities of penetrating are symmetrically arranged in the cylinder body, and the big piston is movably embedded in the first piston cavity and is internally provided with the second piston cavity, and the small piston is embedded in the second piston cavity, the air inlet pipeline supplies the gas to the first piston cavity through the gas delivery groove and the cross air inlet groove, and the air return pipeline drives the big / small piston reset through the big piston air return groove and the air return pipe structure respectively, and the big / small piston single section stroke is 45cm, and the total stroke is 90cm. The utility model discloses through the double -piston nesting and the hierarchical gas circuit design, realizes the stroke extension and the clamping force grading, and simultaneously through multiple sealing guaranteeing the air tightness, and the stable structure low -noise, effectively expands the chuck adaptation range, and protects the thin -walled pipe processing quality.

The utility model relates to a thin-wall pipe fitting grabbing manipulator which comprises a supporting arm, and a connecting base is installed at the top of the supporting arm. The supporting arm comprises a top plate located at the top and two vertical plates extending downwards from the top plate, and a middle area is formed between the two vertical plates. A pair of cylinders of which the bottoms are hinged is mounted in the middle area; the middles of the pair of clamping arms are rotationally connected to the supporting ends on the two sides of the lower portion of the vertical plate correspondingly. Push rods of the pair of air cylinders are correspondingly connected to the top ends of the clamping arms respectively. Rubber chucks are respectively mounted at the lower ends of the clamping arms; the auxiliary supporting plates are connected to the outer vertical face, away from the center, of the vertical plate through connecting screws; the vertical plate is provided with a first avoiding area; according to the scheme, positioning and clamping of the thin-wall part can be achieved without too large clamping force, and the grabbing effect is greatly improved; and the device has the advantages of simplicity in manufacturing, convenience in use, no scratch on part surfaces, large adaptive pipe fitting diameter range and the like.

The utility model relates to a kind of anticorrosive pipe end pasting paper devices in anticorrosive steel pipe, belong to spiral submerged arc steel pipe anticorrosive spraying technical field, including inner side plate and outer side plate, inner side plate and outer side plate between rotation setting adhesive tape wheel and auxiliary wheel, adhesive tape wheel is used to install adhesive tape, auxiliary wheel is used to compact and stick adhesive tape on steel pipe inner wall;The height of outer side plate is greater than inner side plate, and outer side plate can be used to adhere with steel pipe end, positioning the device;The utility model is convenient and fast, improves pipe end pasting paper efficiency, and each steel pipe pasting paper operation only needs 3-4 seconds;The precision of using the utility model pasting paper is high, and stability is strong, can make adhesive tape paper evenly adhere on steel pipe inner wall, without wrinkle, not easy to fall off;The utility model is easy to disassemble and assemble, easy to manufacture, and low in cost;The utility model is suitable for steel pipe diameter range, and pipe diameter φ508-φ1626mm can be used.

This invention discloses a method for preparing a seven-hole multilayer propellant by end-face spraying, applicable to the end-face sealing of multilayer propellants. The invention employs a honeycomb mold to constrain the propellant columns, enabling the orderly arrangement of the seven-hole multilayer propellant. The larger diameter of the inner holes in the honeycomb mold facilitates filling. A solvent-based swelling and sealing technique ensures a tight fit between the outer wall of the seven-hole multilayer propellant and the inner wall of the honeycomb mold, protecting the outer wall. Using a spraying liquid made of the same material as the outer layer of the seven-hole multilayer propellant forms a protective layer with the same composition as the outer layer on the end face, significantly improving the combustion pyrolysis properties of the propellant. This invention solves the problem of only being able to prepare seven-hole multilayer propellants by end-face spraying, providing a technical means for preparing seven-hole multilayer propellants by end-face spraying.

This invention discloses a method for preparing end-face patches for seven-hole multilayer propellants, applicable to end-face sealing of multilayer propellants. The invention employs a honeycomb mold to constrain the propellant cylinders, enabling the orderly arrangement of the seven-hole multilayer propellant. The large diameter of the inner holes in the honeycomb mold facilitates filling of the propellant. A solvent-based swelling and sealing technique ensures a tight fit between the outer wall of the propellant and the inner wall of the honeycomb mold, effectively fixing the propellant's outer wall. The mold's cutting disc structure allows for the simultaneous removal of excess patch portions, yielding multiple samples with end-face patches, significantly improving preparation efficiency. This invention solves the problems of low preparation efficiency and poor quality of end-face patches for seven-hole multilayer propellants, providing a high-quality, high-efficiency technical means for preparing end-face patches for seven-hole multilayer propellants.