62results about How to "Reduce deflection deformation" patented technology

The invention discloses a multi-axis cascade connection direct driving PCB drilling machine. The multi-axis cascade connection direct driving PCB drilling machine comprises a bed, a the bed is provided with a beam, the beam is provided with a beam motor fixing plate, an X-axis linear motor is arranged between the beam and the beam motor fixing plate, the bed is provided with a plurality of cascade connection drilling hole structures connected through cascade connection shafts, every cascade connection drilling hole structure comprises a drilling hole assembly and a Z-axis linear motor, the bed is provided with a Y-axis motion platform, and a Y-axis linear motor is arranged between the bed and the Y-axis motion platform. The multi-axis cascade connection direct driving PCB drilling machine is designed by taking factors such as manufacturing cost, operating cost and machinability into consideration, solves the problems of high load and high vibration due to high-speed driving, achieves optimum compatibility among a control system, a motion system and a mechanical system, can meet requirements of high-quality multi-level drilling hole machining, and overcomes technology defects of low accuracy and poor stability of multi-axis drilling hole machining compared to single-axis machining by improving the cascade structure so as to further improve multi-axis machining accuracy as well as maintain high machining efficiency.

The invention relates to a two-dimensional laser cutting machine, which is of an improvement of a driving mechanism of a cutting head of a laser cutting machine with a local high-speed cutting function within a medium and small range, and is simple in structure and convenient for follow-up control programming. The laser cutting machine comprises a machine body, a cross beam, a laser cutting head and a laser generator, wherein the machine body and the cross beam are connected through an X-direction guide track arranged on the machine body, a Y-direction guide track is arranged on the side surface of the cross beam, and the laser cutting head is movably connected on the Y-direction guide track on the side surface of the cross beam through a local motion mechanism; the local motion mechanism comprises a Y-direction motion support saddle, a two-way hollow spiral shaft, a light guide cylinder, a screw nut I, a driving motor I, a screw nut II, a driving motor II and at least two reflecting mirror groups; and the upright two-way hollow spiral shaft is arranged on the Y-direction motion support saddle, the light guide cylinder is arranged between the shaft and the laser head, and the light guide cylinder plays a role of a cross rod. Therefore, the whole machine is simple for protection and can significantly upgrade speed, precision and rigidity.

The invention discloses a freeway bridge crack repairing method based on a carbon fiber plate. The method comprises the steps of detecting and specially analyzing a crack; preparing construction materials and construction equipment and building a construction bracket platform; cleaning an opening; implanting and cleaning a bolt and fixing the bolt into the opening through vegetable glue; conducting surface treatment on a concrete member, installing an anchor, installing a fixed-end limiting frame, installing the anchor into the fixed-end limiting frame, installing a tension-end limiting frame,and installing a wedge block so that the bottom of the wedge block is arranged under concrete; fixing the carbon fiber plate to the crack through the anchor. In the method, the pre-stressed carbon fiber plate is adopted to apply external pre-stress on the bottom of a box girder for reinforcement and strengthening, the strength and the stiffness of the structure can be improved, the deflection deformation of the structure can be reduced, and the development of the crack can be restrained; besides, with the combination of a crack sealing treatment measure, the durability of a bridge and the ultimate carrying capacity of the structure can be improved, and the emergency capacity of bridge running can be improved.

The invention discloses a ball screw support device. The ball screw support device comprises a support rod (72), a spring (76), an idler wheel (71), an upper inclined plate (73) and a lower inclined plate (75), wherein the spring (76) sleeves the support rod (72); the upper inclined plate (73) is arranged on an external workbench (3); the lower inclined plate (75) is arranged on the support rod (72); the idler wheel (71) is arranged on the top end of the support rod (72). According to the ball screw support device, the ball screw bending is reduced, the deflection deformation is reduced, and thus the movement precision of the workbench is guaranteed; the precision and the rigidity of a machine tool are improved. The ball screw support device is simple and reliable in structure, good in maintainability and low in cost.

Provided is a combined H-shaped steel cast-in-situ box beam support adjoining to and overpassing existing lines. The combined cast-in-situ beam support comprises a steel pipe column strip foundation, steel pipe buttresses, triangular diagonal braces on the two sides of steel pipe uprights, main crossbeams and main longitudinal beams. The triangular steel pipe column buttresses, the main crossbeams and the main longitudinal beams are of a combined structure, stress decomposition is conducted on H600 type steel of the main longitudinal beams through the triangular diagonal braces on the two sides of the steel pipe uprights, force is transferred to a transverse pier body and a longitudinal concrete strip foundation, deflection deformation occurring after the H600 type steel of the main longitudinal beams is stressed is greatly reduced under large span conditions, a statically indeterminate structure of the support is formed, structural stability of the support is enhanced, the construction problem that the left space, right space, upper space and lower space of a cast-in-situ box beam adjoining to and overpassing the existing lines are limited is solved, and it is guaranteed that lower deflection of H-shaped steel under large span conditions and the driving clear height of the existing lines are within specified permissible ranges.

The invention discloses a hydraulic concrete structure composite prestress reinforcing system and a construction method thereof, and relates to the field of hydraulic concrete structure reinforcing systems. The hydraulic concrete structure composite prestress reinforcing system comprises a prestress carbon fiber board. The two ends of the prestress carbon fiber board are respectively fixed to thebottom ends of a hydraulic concrete T-shaped beam by a first anchoring mechanism and a first tensioning mechanism. The hydraulic concrete structure composite prestress reinforcing system further comprises at least two prestress steel strands. The prestress steel strands are symmetrically fixed below the partitioning plates on two lateral faces of the bottom of the hydraulic concrete T-shaped beam.One ends of the prestress steel strands are connected with a second tensioning mechanism, and the other ends of the prestress steel strands are connected with a second anchoring mechanism. The construction method comprises the following steps that paying off and positioning are conducted, base surface processing is conducted, anchoring tool mounting is conducted, prestress carbon fiber board andprestress steel strand mounting and laying are conducted, glue preparation and carbon fiber board binding element applying are conducted, prestress tensioning and locking are conducted, and surface sealing processing is conducted. The invention provides the hydraulic concrete structure composite prestress reinforcing system and the construction method thereof, strength and stiffness of the structure are effectively improved, the bearing capacity of the structure is improved, deflection deformation of the structure is reduced, and the function of reducing and sealing cracks is achieved.

The invention relates to a fabrication and assembly process of an integrally prestressed total-assembled box type modular trestle, which belongs to the technical field of belt conveyer gallery steel trestles, the solved technical problem is to provide the fabrication and assembly process of the belt conveyer gallery steel trestle, and the belt conveyer gallery steel trestle is easy to fabricate, has stable quality, and is suitable for long spans. The adopted technical solution includes: (step 1) a hoisting and assembly site has to be even and compacted; (step 2) at least two box-shaped modules are sequentially hoisted onto skids section by section, and each two neighboring sections of box-shaped modules are fixedly connected; (step 3) primary prestress tensioning is carried out under a bottom plate of a single-span trestle; (step 4) the single-span trestle is hoisted onto articulated bearings of trestle supports and temporarily fixed; (step 5) a plurality of single-span trestles are repetitively assembled and fixedly connected in pairs to form an integrated multi-span trestle; (step 6) secondary prestress tensioning is carried out for the top plate of the integrated multi-span trestle; (step 7) the secondarily prestressed integrated multi-span trestle is inspected and accepted. The fabrication and assembly process of the integrally prestressed total-assembled box type modular trestle is applied to belt conveyers.

The invention discloses a manufacturing method of a high-gloss film plate. The method comprises the steps as follows: S1, manufacturing of a matrix: a plate roller is formed through machining of a seamless steel tube; S2, copper plating treatment of the matrix; S3, plate roller surface treatment after copper plating: the copper surface is ground; S4, gluing treatment: natural airing is performed after a photoresist is applied, black glue is applied, and drying is performed by the aid of an infrared drying machine; S5, laser image file manufacturing and laser engraving manufacturing of the plate roller; S6, developing of the plate roller: the black glue is removed, an exposed area of the photoresist is dissolved with an alkali, and a pattern of a non-exposed area is obtained; S7, electrotyping forming: the developed plate roller is placed in a nickel plating tank, electrotyping is performed, the photoresist after engraving and developing has the insulation performance, and meshes are formed in the development area after electrotyping; and S8, cleaning of the plate roller. Contact of the photoresist with oxygen before exposure is reduced, the condition that the photoresist cannot change drastically due to oxidation of the photoresist is avoided, the more stable flat top dot structure is obtained, and meanwhile, the smoothness difference of surfaces in different positions of the same plate roller is reduced.

The invention discloses a structure construction method for crossing a subway crossing-joint on a pipe gallery. The structure construction method comprises the following steps that after construction positioning is carried out, steel sheet piles are constructed on two sides of a comprehensive pipe gallery as foundation pit supporting structures, and underground diaphragm walls are constructed at set positions on two sides of a subway; earthwork is excavated to the bottom of the comprehensive pipe gallery, a comprehensive pipe gallery base is constructed at the tops of the underground continuous walls, and a comprehensive pipe gallery concrete structure is poured; the remaining underground diaphragm walls on the two sides of the subway are constructed, and a continuous foundation pit supporting structure is formed; and earthwork of the subway foundation pit is excavated, a concrete structure of the subway is constructed and maintained, the earthwork is backfilled, and structural construction of the cross-joint is completed.

The invention provides a column and curved beam horizontal and flexible connection space structure system. Columns and curved beams are horizontally and flexibly connected through horizontal and flexible connecting devices, each horizontal and flexible connecting device comprises a column connector, a curved beam connector a and a steel pull rod for connecting the column connector with the curved beam connector. A vertical suspending connecting device is further connected onto each curved beam and comprises a curved beam connector b and a movable steel suspending rod. The column and curved beam horizontal and flexible connection space structure system is a grid structure and suspended-cable structure combined space structure system. In a space truss structure system, the strength and ductility of a grid curved beam structure are improved, bending resistance bearing capacity of the curved beams is remarkably improved, and deflection deformation of the curved beams is reduced. In a suspended-cable structure, suspended steel structure curved beams are connected through flexible suspending rods. The column and curved beam horizontal and flexible connection space structure system has the flexible connection characteristic, accordingly is simple in overall appearance, even in stress, good in anti-seismic energy dissipation performance and easy to repair and maintain and meets the comfort degree requirement of a suspended steel structure.

The invention relates to a large-span liftable variable-deflection cantilever throwing rod device, and belongs to the technical field of rocket engine charging manufacturing robots. The device comprises a mobile end lifting group module, a cantilever rod, a platform base, a fixed end lifting group module, a tail end throwing and coating device and a shell, wherein a guide rail is arranged on the upper surface of the platform base; the movable end lifting group module and the fixed end lifting group module are both arranged on the guide rail and are in sliding fit with the guide rail; the cantilever rod is axially arranged above the guide rail in parallel; the axial head end of the cantilever rod is rotationally connected with the top of the movable end lifting group module; the axial tail end of the cantilever rod is in lap joint with the top of the fixed end lifting group module; the tail end throwing and coating device is sleeved at the axial tail end of the cantilever rod; the shell is of a hollow columnar structure; and the shell is coaxially arranged at the axial tail end of the cantilever rod. The coating device has the capacity of considering the coating quality and efficiency, and can flexibly extend and retract in small spaces of engine shells with different lengths and different diameters, so that the problems in the prior art are solved.

The invention relates to a hydraulic pressure gear pump. It is used to improve the working press and length of life of the hydraulic pressure but need not to change the structure of the original pump body. It includes drive gear which is fasten by two drive gear axle bearing and driven gear which is fasten by two driven gear axle bearing, the particular lie on the external diameter of the driven gear must be greater than the drive gear's. The advantages are simple processing, high operation pressure and long service life.

The invention relates to a dual-belt synchronous clamping conveying device, and belongs to the technical field of material conveying. The device comprises an oblique frame for supporting a driving roller and a pull-down tension roller, wherein a lower layer conveying belt is wound on the driving roller and the pull-down tension roller; an upper framework and a lower framework extend out of the frame; a driven roller is further supported on the driving roller of the frame; a synchronous driving roller is supported on the upper framework; a swinging rod of which the lower end is provided with a floating roller is hinged to the upper framework; a slide rail swinging rod of which the lower end is provided with a gravity roller is hinged to the lower part of the lower framework; the upper end of a bilateral cylinder is hinged to the upper end of the lower framework; the lower end of the bilateral cylinder and the slide rail extending along the length direction of the slide rail swinging rod construct a moving pair; an upper layer conveying belt is wound on the driven roller, the synchronous driving roller and the gravity roller; the floating roller is arranged on the upper layer conveying belt. According to the dual-belt synchronous clamping conveying device, stable and continuous conveying can be realized under the condition of large inclination angle, and a material inlet can float along with a shape to adapt to the height change; moreover, an automatic tensioning mechanism is flexible and reliable, materials are prevented from falling off, and automation and centralized control are realized easily.

The invention relates to a roller for reducing flexural degree, comprising a frame which contains an upper roller base and a lower roller base via multipoint support beams respectively connected with an upper roller system and a lower roller system in tower structure. The frame is formed by a panel, a back plate, a top plate and a bottom plate, wherein the back plate and the panel are disposed with a material inlet and an outlet, the top plate and the upper roller base are symmetry arranged with two presses which is pressed on the upper roller base via a safe concave along the axle of the upper roller system, the minimum distance between two nearest function points of two presses on the upper roller base is smaller than the distance between two furthest function points of upper roller system on the upper roller base. The invention can reduce flexural degree and reduce deformation.

The invention provides a pump body assembly of a rotor compressor, the rotor compressor and an air conditioner. The pump body assembly of the rotor compressor comprises an air cylinder structure; a piston, which is arranged in the air cylinder structure, a mounting space is formed in the piston, and an opening of the mounting space is formed in the first end face of the piston; a balance block, which is arranged in the mounting space; and a crankshaft, which is connected with the first end face of the piston. According to the technical scheme, the problem that a crankshaft is prone to deflection deformation due to eccentric arrangement of the mass center of the pump body assembly in the prior art is effectively solved.

The invention discloses a concrete service bridge for opening and closing a gate of a large-span prestressed flood retaining gate, and relates to the technical field of water conservancy and hydropower engineering. The structure comprises pier columns, a prestress service bridge and a bridge crane, a bridge crane rail is pre-buried in the prestress service bridge, a pre-tensioning steel strand is arranged in the prestress service bridge, the prestress service bridge adopts a T-shaped section, and rib plates are arranged on the two sides of the prestress service bridge at intervals. According to the method, the high tensile property of the pre-tensioning steel strands in the tensile area is fully utilized, the deflection deformation of the service bridge can be reduced by about 6 mm according to the scheme comparison and selection calculation result, the reduction proportion is about 15%, and therefore the concrete cracking degree of the tensile area is reduced or avoided. The invention further relates to a construction method of the concrete service bridge for opening and closing the gate of the large-span prestressed flood retaining gate.

The invention relates to a steel sheet pile supporting structure and method, and relates to the field of building construction.The steel sheet pile supporting structure comprises two rows of stand columns which are oppositely arranged, a plurality of cross beams are fixedly connected to each row of stand columns, and the length direction of the cross beams is parallel to the arrangement direction of each row of stand columns; the cross beams are arranged in the height direction of the stand columns, a plurality of supporting beams arranged in the length direction of the cross beams are arranged on the cross beams, and the two ends of each supporting beam are fixedly connected with the cross beams at the same height position on the two rows of stand columns respectively; a baffle used for blocking the space between the stand column and the cross beam is arranged between the stand column and the cross beam. The method has the advantages that the supporting structure strength is improved, the safety of structural supporting construction in the deep foundation pit is improved, and the construction progress is guaranteed.