21 results about "Support removal" patented technology

The invention relates to the technical field of tunnel engineering construction, and discloses an integral construction method for a stacked tunnel, which adopts an integral construction mode that no soil body is left in a crossed and overlapped section of an upper-layer main line tunnel and a lower-layer main line tunnel, and excavation and supporting structures are constructed in the same period, and specifically comprises the following steps: step 1, in a construction preparation stage, firstly, geological investigation is performed on a stacked area; and determining surrounding rock grades (III grade, IV grade and V grade) and geological parameters. The construction method has extremely high geological suitability, dynamic optimization is performed from multiple aspects such as an excavation mode, a support material ratio and monitoring frequency by establishing a surrounding rock grade-construction parameter matching model, and surrounding rock conditions with different stability from grade III to grade V can be flexibly adapted. And the temporary support is dismantled by adopting a segmented unloading technology, the dismantling sequence, the speed and the stress change are strictly controlled, impact on the completed lining structure is avoided, the section size is rechecked through a laser range finder after dismantling, and it is ensured that the construction quality reaches the standard.

The application provides a deep foundation pit temporary support removal method and device, S1, during construction, temporary lattice columns are used as the vertical column structure of temporary support; S2, during pouring of the temporary support, pipes along the horizontal width direction are pre-buried to form pre-buried holes; S3, during cutting of the temporary support, a rope saw is inserted into the pre-buried holes to cut; S4, the cut concrete blocks are crushed and transported out of the foundation pit; S5, the temporary lattice columns are removed; the temporary support in the deep foundation pit is removed through the above steps. The cut concrete blocks are crushed by a crushing device in a resonance mode; the temporary support at the connecting position is removed by a portable crushing device mainly in a resonance mode. The scheme of removing the temporary support in one piece by the rope saw improves construction efficiency and reduces construction difficulty. The pre-buried hole structure is convenient for the rope saw to be inserted, and greatly reduces construction difficulty.

The application discloses a kind of mobile bridge temporary support removal passage device and use method, wherein device includes two load-bearing beams across median strip, two load-bearing beams are parallel to each other and are located above guardrail, the bottom of load-bearing beam is provided with auxiliary device capable of supporting it to move on bridge deck along the direction of extension of median strip, two first connecting rods parallel to the direction of extension of median strip are detachably arranged between two load-bearing beams, a lifting point connecting beam located directly above median strip is fixedly connected to two first connecting rods, a removal passage is installed on the bottom of lifting point connecting beam by support, an I-steel joist is arranged at the bottom of removal passage, a horizontal passage is fixedly arranged on I-steel joist, and a vertical ladder is arranged on horizontal passage.

This invention provides a slanted portal support device, comprising a support device body, which includes a main beam assembly, a connecting assembly, an auxiliary beam, and an anchoring mechanism. The main beam assembly has an overall arc-shaped structure, and each main beam assembly is installed on the inner side of the tunnel body. A tunnel portal is provided at the front end of the tunnel body, and the front end of the tunnel portal has a slanted surface. The sides of the main beam assembly are connected and fixed by the connecting assembly. An auxiliary beam is built at the front end of the connecting assembly. This slanted portal support device avoids damage to the inner wall of the tunnel by setting the anchoring mechanism at the bottom end of each main beam assembly and embedding it into the bottom of the base. Subsequent support removal does not require repair of the inner wall, simplifying the construction process. The auxiliary beam structure at the end provides independent support for the protruding slanted portal, reducing material usage and lowering construction costs.

The invention discloses a selective laser melting forming method for a large-size aviation high-strength aluminum alloy thin-wall special-shaped grating. The selective laser melting forming method comprises the steps of part process model design, part placement and support design, selective laser melting forming, heat treatment, support removal and part grinding. In the step of designing the part process model, thickening and chamfering the thin-wall area of the tip of the lower skin of the grating; in the step of part placement and support design, a grid opening overhanging included angle of a grid horizontal section, an included angle in the moving direction of a scraper and a grid lower surface inclination angle are set; a sheet-shaped support is arranged between the grid opening with the grid opening suspension included angle of 60-120 degrees and the tip end of the grid lower skin; in the step of selective laser melting forming, technological parameters of selective laser melting forming are set. The forming quality and the forming precision of the large-size aviation high-strength aluminum alloy thin-wall special-shaped grating are improved, the internal defect density can be controlled to be 0.1% or below, and the forming precision can be controlled to be within + / -0.5 mm.

The invention discloses a method for accelerating construction of a ramp located at the boundary of a foundation pit through a lattice type profile steel inclined supporting device. The slope construction process includes the steps of basement foundation bottom plate and inclined strut base installation, basement outer wall and top plate construction completion, support dismantling (the rest of structures on the periphery can be constructed), outer wall water prevention and backfilling, slope bottom plate cushion layer and water prevention, slope bottom plate construction and slope wall plate and top plate structure construction. The rest structures on the periphery are constructed in advance, and ramp wallboards and top plate structures are not constructed in two times; the construction process of the foundation pit supporting system covering ramp is rapid and efficient, and a reliable and feasible technical scheme is provided for similar construction.

This invention provides a high-support formwork construction method, comprising the following steps: S1, Construction preparation: Measuring and setting out the high-support area to determine the positioning axis, elevation, and upright placement of the support system; verifying and reinforcing the bearing capacity of the support foundation; setting pads and bases at the bottom of the uprights; inspecting incoming steel pipes, fasteners, plywood, and timber components, ensuring they are qualified before use. This invention provides a high-support formwork construction method that coordinates steps such as construction preparation, support system erection, formwork erection, concrete pouring, monitoring and acceptance, and formwork and support removal. During high-support formwork construction, it enables precise scaffolding placement according to standardized procedures, standardized acceptance monitoring, and strict control of demolding intensity, thereby achieving refined management of high-support formwork construction. This solves the problems of traditional high-support formwork erection being rough, unstable, non-standardized acceptance, and high safety risks, improving the overall rigidity of the scaffolding and construction safety.

The invention belongs to the technical field of orthodontics, and particularly relates to a 3D printing-based integrated forming design and manufacturing method for a traction hook of an orthodontic appliance. A traction device model is directly designed on a three-dimensional digital model of the appliance, the traction device model and an appliance shell are integrally constructed, and integral forming printing of the appliance and a traction hook is completed through 3D printing equipment by adopting a photopolymer resin material through support addition; after printing is completed, the appliance and the support are separated from the platform, post-treatment operation of residual resin cleaning, support removing, UV curing, shape memory strengthening, polishing, cleaning and drying treatment is carried out, and the finished appliance is obtained. High-strength seamless combination of the traction device and the appliance is achieved, the production process is simplified, the design freedom degree and the reliability of the correction mechanical effect are improved, and meanwhile the wearing comfort of a patient is remarkably improved.

The utility model discloses a portable farmland ditching device which comprises a first plow arm and a soil turning plate, the soil turning plate is welded at the bottom of the first plow arm, a supporting mechanism is arranged on the first plow arm, and a farmland ditching plough can move conveniently through the supporting mechanism; the supporting mechanism comprises a connecting block, a connecting rod and a supporting plate, the connecting block is welded to the rear end of the first plow arm, one end of the connecting rod is hinged to the connecting block, and the other end of the connecting rod is connected with the supporting plate in a welded mode. The movable wheel can be supported by the supporting plate to turn over to the back of the furrow plough, the furrow opening work of the furrow plough is not affected, the movable wheel can be supported by the supporting plate to turn over to the bottom of the furrow plough to support and transfer, no extra tool is needed to transfer the position of the furrow plough in a short distance, and the furrow plough is more convenient to move.

This invention discloses a rapid prefabricated construction method for co-construction of rainwater and sewage pipelines in the same trench. The method includes: determining the co-construction route for rainwater and sewage pipelines in the same trench, and dividing the construction into sections based on the modular support length of pre-assembled box-type support units; after excavating the current construction section to the design elevation, hoisting the pre-assembled box-type support units as a whole into the trench to maintain trench working space; performing foundation treatment within the trench working space, and hoisting and positioning prefabricated rainwater pipe sections and prefabricated sewage pipe sections with integrated prefabricated support bases; connecting adjacent prefabricated sewage pipe sections with sockets, forming a composite interface seal through internal and external sealing components; backfilling while the support units are still in place, and after the backfill meets the conditions for support removal, hoisting the support units as a whole and transporting them to the next construction section for cyclical construction. This invention can shorten trench exposure time and improve construction safety and interface sealing stability.

This invention discloses a multi-degree-of-freedom machining device for removing support structures in 3D printing, relating to the technical field of post-processing in metal additive manufacturing. This invention aims to solve the problems of low operational precision and easy damage to parts in existing 3D printing support removal methods. The invention includes a mounting base, a rotary drive assembly, a tool feed assembly, and a dust removal assembly. An inner bushing is fixedly connected to the extended end of a hollow driven shaft. An outer bushing is fitted outside the inner bushing. A linear feed motor that drives the cutting tool axially feeds is located inside the inner bushing. The outer bushing can slide axially relative to the inner bushing and is driven to rotate synchronously by the inner bushing. The dust removal assembly includes a dust suction port on the outer bushing, an internal gas flow channel inside the inner bushing, a telescopic conduit connecting the two, a dust collection chamber, and a negative pressure source. The gas flow channel is connected to the dust collection chamber via the hollow driven shaft. This invention, through multi-degree-of-freedom posture adjustment of the robotic arm combined with independent tool feed, can complete the support removal of complex parts in one operation, eliminating the need for multiple clamping operations.

This invention belongs to the field of automotive glass hot bending technology, specifically a hot bending mold and method for automotive glass processing. It includes a mold base mechanism and automotive glass, with the mold base mechanism placed on the ground. A hot bending drive mechanism is placed on top of the mold base mechanism, autonomously bending the heated automotive glass. Two ends of the hot bending drive mechanism are connected to a first support mechanism, which is configured in four groups. The first support mechanism supports the automotive glass before it is heated. This invention achieves precise temperature-mechanical linkage between automatic support removal when the glass softens to a suitable state and the bending initiation by setting a fusible wire with a specific melting temperature in the first support mechanism and connecting both ends of the fusible wire to a fourth connecting rod and a first fixing groove. This solves the problems of existing technologies that rely on external sensors or manual judgment of bending timing, and glass cracking or edge collapse due to starting too early or too late.

The invention provides a deep foundation pit steel support axial force non-intrusive monitoring device and an intelligent monitoring method. The monitoring device comprises a piezoelectric ceramic actuator, an MEMS accelerometer, a controller and a self-adaptive bridge type mounting mechanism. Wherein the self-adaptive bridge type mounting mechanism comprises a fixed disc and an adsorption seat, the fixed disc is used for mounting a piezoelectric ceramic actuator or an MEMS accelerometer, and the adsorption seat is used for being in adsorption connection with a steel support; for an existing constructed structure, the monitoring device can be installed at monitoring points where sensors fail or key positions where the monitoring points are not distributed to conduct remedial monitoring or supplementary monitoring. In the steel support dismantling stage, the monitoring device can be dismantled in a lossless mode and used for other follow-up engineering projects, and cyclic reuse is achieved. In addition, the connecting rod is hinged between the fixing disc and the adsorption seats, the span between the two adsorption seats can be changed by adjusting the angle of the connecting rod in the using process, and therefore the device can be attached to the surfaces of steel supports with different curvature radiuses, and universality is good.

The application discloses a method for laser deposition additive manufacturing of overhanging structure and a support assembly, and belongs to the technical field of additive manufacturing. The method comprises the following steps: firstly, depositing a part body below an overhanging starting surface, suspending, then fixing an oxide ceramic support body through a temporary mechanical fixing device, setting a metal sacrificial layer of the same base material system as the part body on the support body, continuing to deposit the overhanging structure, removing the fixing device after forming, and removing the sacrificial layer through mechanical processing to obtain a pure part. The support assembly comprises an oxide ceramic support body, a temporary mechanical fixing device and a metal sacrificial layer preform. The application solves the problems of difficult support removal, easy damage to the part and non-reusable support in the existing laser deposition forming of the overhanging structure, realizes self-falling of the support, non-chemical pollution and reusable support, significantly reduces the post-processing cost, and is suitable for laser deposition forming of titanium alloy, high-temperature alloy and the like.

The invention discloses an additive manufacturing method of a thin-wall tubular three-dimensional convex mold, which adopts the design of a thin-wall blocky support and support teeth, so that the support contact area is reduced by 20-30%, the support removal efficiency is improved by 40%, and the damage to convex characteristics is avoided; the supporting structure is added in a comprehensive position, so that the deformation of the part due to self stress is effectively reduced, and the part formability is ensured; thermal deformation is reduced through a partition energy input strategy and increase of cooling time; the surface quality of the part is controlled by optimizing process parameters and changing parameters such as exposure time, dot spacing and line spacing; and a rotary support removing mode is adopted, it is guaranteed that in the removing process of all the thin-wall blocky supports, part deformation is slight, and the forming precision of the part is not affected.

The utility model relates to a pipeline building support for building construction, which belongs to the technical field of building construction and comprises a frame, sliding supports are arranged at four corners of the frame in a sliding manner, and universal wheels are arranged at the bottoms of the sliding supports. First bidirectional driving mechanisms for driving the sliding supports to move are arranged on the two sides of the frame, a transverse rod is fixedly arranged in the middle of the upper side of the frame, two sliding rods are arranged on the lower side of the transverse rod in a sliding mode, and a second bidirectional driving mechanism for driving the two sliding rods to be close to each other and away from each other at the same time is arranged on the transverse rod. The lower sides of the two sliding rods are each provided with a hanging rod in a sliding mode, the inner sides of the two sliding rods are each provided with an adjusting mechanism for driving the hanging rods to slide, the lower ends of the two hanging rods are each provided with a clamping mechanism in a vertical sliding mode, pipelines of different lengths can be set up, and the practicability of pipeline installation is improved.

The invention discloses a control method for rod direction stress and shrinkage stress of a high-strength aluminum alloy rod piece, which comprises the following steps: S1, model processing; the method comprises the steps that (1) a continuous surrounding plate is arranged along the outer wall of a part, the surrounding plate and the part are connected through an inclined pull rod, and no gap exists among the surrounding plate, the part and the inclined pull rod, (2) a supporting plate and supporting feet are added to the middle position below the sudden change platform structure, the supporting plate is divided into two parts to obliquely fall on the side wall to form the supporting feet, and no gap exists among the supporting plate, the supporting feet and the part, S2, selective laser melting forming, S3, annealing and S4, linear cutting are conducted. S5, support removal; and S6, surface treatment. The method is suitable for high-quality additive manufacturing production of various high-strength aluminum alloy rod pieces with complex structures, auxiliary structures such as the surrounding plates, the pull rods, the supporting plates and the supporting feet are simple in design, the removal cost is low, and the problems that the forming process of the additive manufacturing high-strength aluminum alloy rod pieces is unstable and prone to failure, and sudden change positions of part structures are prone to cracking are solved at one stroke; and the high-strength aluminum alloy rod piece with low cost and high quality can be rapidly produced.

The present application belongs to the technical field of temporary support removal of tunneling, and particularly relates to a construction method for temporary support removal of double-side-wall pilot tunnel method of water-rich large-section tunneling under weak geological conditions; the method comprises the following steps: S1: removing the shotcrete and I-beam of the temporary mid-parting wall in the inverted arch range in sections; S2: constructing the inverted arch, so that the removed break of the temporary mid-parting wall is supported on the top surface of the reinforced concrete structure of the inverted arch to form a temporary support back-up state; S3: constructing the lower side wall below the temporary inverted arch; S4: removing the shotcrete of the remaining temporary support first, then erecting temporary I-beam cross braces between the top of the lower side walls on both sides, and finally removing the I-beam of the remaining temporary support; and S5: after the temporary support removal is completed, the upper side wall and arch construction are performed, and the inverted arch and secondary lining structure are closed to form a ring. The present application can permanently solve the problem of water seepage channel formed by the I-beam of the temporary support left between the primary support and the secondary lining structure, and ensure the integrity and safety of the structure.

The invention relates to the technical field of bridge construction, in particular to a large-span cast-in-place bridge support and a construction method. The bracket comprises a bracket main body, the bracket main body comprises supporting legs, and a connecting frame is arranged between the supporting legs and the bridge pier; an upper mounting frame is arranged above the supporting legs, and a plurality of pillow plates which are arranged at intervals in the length direction of the upper mounting frame are arranged above the upper mounting frame; an adjusting assembly used for adjusting the distance between the pillow plate and the upper mounting frame is arranged between the pillow plate and the upper mounting frame. The construction method comprises the steps of S1, construction preparation and survey setting-out; s2, a connecting frame and supporting legs are installed; s3, mounting an upper mounting frame; s4, the adjusting assembly is installed; s5, a pillow plate and formwork system is installed; s6, prepressing and elevation adjustment; s7, pouring a bridge main body; s8, dismounting the bracket; modularization design and assembly construction can be adopted, the installation efficiency is greatly improved, the construction period is shortened, components are standardized and can be repeatedly used, and the comprehensive cost is effectively reduced.

An apparatus and method for removing support material from and / or smoothing surfaces of an additively manufactured part (the “AM part”) is disclosed. The apparatus may include a chamber, a support surface within the chamber, and one or more nozzles within the chamber. The nozzles may be the same size or different sizes. The support surface may be configured to support the AM part. The support surface may have one or more openings sized and configured to allow the fluid to pass through the opening(s). The nozzles may be configured to spray a fluid at the AM part, and the spray may be an atomized or semi-atomized spray of the fluid. For removing support material from parts with internal spaces, such as cavities or passages, the apparatus can include a nozzle at the end of an adjustable flexible hose member that can be adjusted to spray into an internal space of the part. Alternatively, for removing unwanted support material from multiple parts with internal spaces, the apparatus may include a submersion tank.

The present application relates to the field of additive manufacturing, in particular to a kind of support removal method for laser additive manufacturing thin-walled special-shaped curved surface parts and its application and support removal auxiliary device.The removal method described in the present application forms a support removal auxiliary device by manufacturing a conformal main structure and a water cooling device, and simultaneously cools the part by air and liquid during the support removal process, reduces the temperature of the part, reduces thermal stress, can inhibit large size deformation of the part, and improves forming quality.At the same time, by designing the shape and size of the support removal auxiliary device and the water cooling device, the function is fully exerted while the machining amount is minimized and the material used is minimized.Meanwhile, by designing the placement position of the part during laser selective melting additive manufacturing process, the support is only added to one side of the part, which better adapts to the removal method described in the present application.The present application reduces the deformation tendency of laser selective melting additive manufacturing parts and improves the forming quality.