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952results about How to "Avoid deformation" patented technology

High-performance elastic composite abrasive sheet and preparation method thereof

The invention belongs to the field of coated abrasives, and relates to a high-performance elastic composite abrasive sheet and a preparation method thereof. The high-performance elastic composite grinding sheet comprises a vulcanized paper back base, bottom glue, abrasive and complex glue, wherein the bottom glue comprises the following compositions in percentage by weight: 25 to 40 percent of phenolic resin A, 15 to 40 percent of phenolic resin B, 30 to 58 percent of fillers, 0.1 to 1.5 percent of surfactant and 0.1 to 15 percent of diluent; and the complex glue comprises the following compositions in percentage by weight: 15 to 70 percent of phenolic resin C, 15 to 70 percent of phenolic resin D, 0.1 to 3 percent of efficient flatting agent, 5 to 60 percent of fillers, 0.1 to 1.0 percent of coupling agent, 1 to 5 percent of pigment, and 0.1 to 10 of thinner. The method for preparing the high-performance elastic composite abrasive sheet comprises the steps of bottom glue coating process, grain coating process, complex glue coating process, post curing process, curly sand surface flatting process, laser cutting process, vulcanized paper deformation preventing process and storage process, wherein in the post curing process, the sand surface is curly outwards, and after the curly sand surface flatting process, the sand surface is curly inwards so as to enable the sand surface to be flat. The invention can effectively prevent deformation, and has the advantages of strong tensile strength, good adhesive performance and strong grinding performance.
Owner:JIANGSU FENGMANG COMPOUND MATERIAL SCI&TECH GRP CO LTD

Near-field electrostatic jet-printing head

InactiveCN102501598ALower injection voltage thresholdAvoid deformationPrintingSpray nozzleMicro nano
The invention discloses a near-field electrostatic jet-printing head, relating to the electrostatic jet-printing head. The invention provides the near-field electrostatic jet-printing head with low-voltage driving and capability of jetting and printing micro-nano pattern structures accurately. The near-field electrostatic jet-printing head is provided with a laser generator, a computer, an electromagnetic valve, an air guide pipe, a sealing head, a jet pipe, a conducting probe and an air pipe, wherein the laser generator generates laser beams; the computer is connected with the electromagnetic valve and the laser generator; the upper end of the jet pipe is provided with an outer thread, and the lower end of the jet pipe is a jet nozzle; the sealing head is in threaded connection with the outer thread of the upper end of the jet pipe by an inner thread; the air pipe is positioned in the jet pipe and is fixed on the sealing head; one end of the air pipe is connected with the output end of the electromagnetic valve by the air guide pipe, and the other end of the air pipe is an air outlet with a reducing structure; the air outlet is coaxial to the jet nozzle; and one end of the conducting probe is fixed on the sealing head and is connected with a positive electrode of a direct-current voltage source, and the other end of the conducting probe extends out of the end part of the jet nozzle.
Owner:XIAMEN UNIV

Bored pile construction method for reinforcing cage framework layered installation

InactiveCN103615001AAvoid hitting the hole wallAvoid deformationBulkheads/pilesRebarBuilding construction
The invention discloses a bored pile construction method for reinforcing cage framework layered installation. The bored pile construction method for reinforcing cage framework layered installation comprises the steps of (a) making preparation for construction, (b) setting out a pile position, (c) manufacturing a pile casing and pre-burying the pile casing, (d) drilling a bore, (e) reinforcing a dado, (f) cleaning the bore for the first time, (g) manufacturing reinforcing cage frameworks and installing the reinforcing cage frameworks in a layered mode, (h) placing a guide tube, (i) cleaning the bore for the second time, (j) pouring concrete, (k) recycling the pile casing and (l) backfilling the pile bore. According to the bored pile construction method for reinforcing cage framework layered installation, the reinforcing cage frameworks are placed in the bore in a layered mode, aligned one by one and welded, so that a reinforcing cage is installed, and a traditional method that the reinforcing cage is directly installed is replaced; the reinforcing cage can be stably placed in the bore, and the reinforcing cage is prevented from colliding against the wall of the bore and prevented from deforming; in addition, the reinforcing cage can be accurately located to the center of a bore site, and the reinforcing cage is prevented from floating or sinking in the process of concrete pouring. Besides, by the adoption of the bored pile construction method for reinforcing cage framework layered installation, the speed is high, a construction period is short, and the quite high scientific performance and the feasibility are achieved.
Owner:NINGBO SHENGHONG CONSTR ENG

Machining method of long-and-thin walled cylindrical component

The invention provides a machining method of a long-and-thin walled cylindrical component, and belongs to the technical field of machining of cylindrical components. The method comprises the following steps: carrying out rough machining to obtain a rough machining workpiece with a chuck; carrying out quenching and tempering treatment on the workpiece subjected to rough machining; carrying out ultrasonic flaw detection on the workpiece; carrying out rough turning and half finished turning of the workpiece; carrying out stress elimination treatment on the workpiece; caryring out finished turning of the workpiece; placing a circular disc shaped support part in an inner hole of a chuck end; clamping the chuck; carrying out finished turning of an outer circle and the inner hole; radially cutting a groove on the outer circle of the workpiece close to the chuck part; then carrying out finished turning of the inner hole and the end surface of the other end to a designed size; finally, cutting off the end provided with the chuck; milling and cutting off the end surface of the workpiece of the chuck end to the length of the workpiece to meet the design requirement. According to the machining method of the long-and-thin walled cylindrical component, the deformation of the workpiece during clamping can be avoided, the machining stress of the workpiece can be effectively released, and the situation that coaxial degree of the workpiece meets the design requirement can be guaranteed.
Owner:SHENYANG TURBO MASCH CORP

Network line crystal head

The invention relates to the technical field of a crystal plug, in particular to a net cable crystal plug; a rubber core of the crystal plug is opened with a second groove body for containing terminals, and a reversed hook shaped bayonet is opened on the second groove body at the front end surface of the rubber core; the terminal is in a pi shape and is arranged in the second groove body on the rubber core; a reversed hook matched with the shape of the bayonet on the rubber core is formed on the front end pole body of the terminal, and an electrical contact part is arranged on the top surface of the middle pole body of the terminal; as the reversed hook of the front end pole body of the terminal is checked in the bayonet on the rubber core, after the net cable crystal plug is assembled, the terminal can be tightly fixed on the rubber core; when the net cable crystal plug is used in various environments, the terminal can not be lifted, and the deformation of the terminal is prevented, thus preventing the poor contact or contact lost between an electric-conducing terminal and a core wire; in addition, the deformation of the core rubber is limited, thus preventing poor contact when the net cable crystal plug is jointed with a female socket in an abutting way; the quality is stable and the service life is long.
Owner:YONG TAI ELECTRONICSDONGGUAN LTD
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