64 results about "Support removal" patented technology

The invention discloses a cast-in-place concrete beam construction method based on deformation control, and relates to the field of cast-in-place beam construction. S2, foundation treatment; s3, a support is erected and pre-pressed; s4, a formwork is installed; s5, steel bars and prestressed pipelines are installed; s6, concrete construction; and S7, removing the bracket. BIM modeling and an intelligent monitoring system are combined, the foundation treatment range is expanded, an automatic drainage system is arranged, edge settlement and rainwater soaking are effectively avoided, a support system is selected according to needs, anti-sidesway design is strengthened, stress is accurately simulated through graded automatic loading and pre-pressing, reliable deformation data are ensured through double monitoring, pre-camber calculation is scientific, errors are reduced, and the construction efficiency is improved. Formwork, reinforcing steel bars and prestressed pipelines are installed in a standard mode, the structural quality is guaranteed, concrete construction pays attention to temperature control and maintenance, crack reduction and support dismantling are symmetrically carried out in a grading mode, the springback amount is monitored in real time, and construction safety is guaranteed.

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 present application relates to the field of additive manufacturing, in particular to a support removal method for laser additive manufacturing topological optimization support parts and application and a support removal auxiliary device. The support removal method provided by the present application can provide stable support for the parts by making conformal ceramic fixing structures and utilizing the high hardness and stability of ceramic materials to effectively prevent the parts from deforming when the support is removed. At the same time, the conformal copper alloy cooling flow channel can timely take away the heat generated in the mechanical action to effectively cool the support, thereby avoiding thermal stress of the parts due to temperature rise and further preventing the parts from deforming. This innovative support removal method combines the support function of ceramic with the cooling function of the copper alloy cooling flow channel to realize the protection of the parts during the support removal process, improve the dimensional accuracy and quality stability of the parts, reduce the production cost, and improve the production efficiency.

The invention relates to the field of laser additive manufacturing, in particular to a method for removing a support of a laser additive manufacturing thin-wall annular structure part, application of the method and an auxiliary device for removing the support. According to the method for removing the support of the laser additive manufacturing thin-wall annular structure part, in the support removing process, the deformation amount of the part is monitored in real time, deformation can be found in time, large-size deformation of the part is restrained in an air cooling mode, and the forming quality is greatly improved. In addition, the deformation amount of the part is collected in real time through a piezoresistive sensor, the cooling process is synchronized, operation is easy and convenient, the structure is simple, the equipment cost is low, applicability is good, the problems of deformation and cracking of the thin-wall annular structure part manufactured through laser additive manufacturing are effectively solved, and the manufacturing efficiency and the forming quality are greatly improved. Meanwhile, by designing the positions, the sizes and the shapes of the piezoresistive sensor and the temperature control system air outlet hole, the machining amount is minimum and the used materials are minimum while the function is ensured to be brought into full play.

The present invention discloses a construction method for a temporary plate support-assisted shield tunneling through an ultra-deep foundation pit, comprising the following steps: Step 1, temporary plate support removal and establishment of a safe working platform; Step 2, laying of a bottom tire buffer system; Step 3, installation of a hoisting system for cutting and placing plates; Step 4, cutting of temporary plate support; Step 5, hoisting of the cut plates of temporary plate support; Step 6, tunneling of the shield equipment through the ultra-deep foundation pit; Step 7, establishment of a track slab support: establishment of a scaffolding structure below the area where the track slab is to be cast; Step 8, casting of the track slab. The construction method involved in the present invention can solve the problem of a temporary plate support structure assisting a shield tunneling through the foundation pit under an ultra-deep foundation pit, and has good technical benefits; and the use of a safe working platform for temporary plate support removal solves the problem of limited high-altitude working space in ultra-deep foundation pits, providing a working platform for workers to perform high-altitude operations.

The invention relates to the technical field of shear walls, and discloses a steel plate shear wall structure and a construction method of a shear wall. The steel plate shear wall structure comprises a wallboard, a connecting frame is connected to the outer side of the wallboard, a deflection shaft is connected to the connecting frame, a deflection strip is rotationally connected to the deflection shaft, a fixing seat is arranged on one side of the connecting frame, and a fixing rod is connected to the fixing seat; the fixing rod is connected with a limiting ring, the deflection strip is connected with a limiting mechanism used for stabilizing connection between the wallboard and the fixing rod, the connecting frame is connected with an embedded column, the embedded column is connected into the wallboard in a penetrating mode, the two ends of the deflection shaft are fixedly connected with fixing clamps, the fixing clamps are fixedly connected to the connecting frame, and a fixing hole is formed in the fixing seat. A combined structure is adopted, a traditional temporary welding support is replaced, on-site cutting and polishing operation is not needed, damage to a wall structure is avoided, the deflection strips, the screws and other parts can be repeatedly used, and the problems that a traditional support is high in dismantling cost, the structure is prone to being damaged, and space is wasted are solved.

The invention discloses a mechanical arm for removing a hydraulic support on a fully-mechanized coal mining face, and relates to the technical field of coal mine fully-mechanized coal mining equipment mounting and dismounting equipment. By means of the optimal design of the mechanical arm structure, the mechanical arm can be suitable for a lower space under a frame, the overall structural strength of the mechanical arm can be remarkably improved, and the applicability of the mechanical arm is improved. The hydraulic support withdrawing mechanical arm comprises a base, a lifting oil cylinder, an overturning base, a swing oil cylinder and a telescopic arm. The turnover base is connected to the base and located on the front side of the base, the two ends of the lifting oil cylinder are hinged to the base and the turnover base respectively, the lifting oil cylinder is located on the rear side of the turnover base, the turnover base is driven by the lifting oil cylinder to turn over, and the telescopic arm is driven by the swing oil cylinder to swing left and right. Under the same traction force, the boundary dimension of the device is reduced, especially the height is greatly reduced, the exquisite structure can achieve larger traction force, and the applicable support type range is wider.

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 invention relates to the technical field of building construction, and discloses a deep foundation pit inner support dismantling device and a using method.The deep foundation pit inner support dismantling device comprises a bottom plate, universal wheels are rotationally installed at the bottom of the bottom plate, a cutting device and a positioning device are arranged at the top of the bottom plate, and the cutting device comprises a shell, a supporting table, a rotating motor, a rotating shaft, a first baffle and a saw blade; the positioning device comprises a rack, a gear, a driving shaft, a rotating seat and a rotating disc, and further comprises an adjusting device and a protection device. According to the device, by adjusting the cutting speed and the operation mode, the fret saw can ensure that the cutting face is smooth and the size is accurate, the positioning device can accurately adjust the position and angle of the saw blade, the cutting precision is further improved, and through positioning of the gear rack and the rotating disc, the position of the dismounting device can be adjusted in the displacement state of the bottom plate part; when the ground of a construction site is not enough to support the device to continuously move, normal cutting of the device is guaranteed, and the practicability of the device is improved.

The utility model belongs to the technical field of foundation pit inner supports, and particularly relates to a foundation pit support changing and inner support dismantling construction structure which comprises a foundation pit, an inner supporting rod is arranged in the foundation pit, a vehicle body is arranged on one side of the foundation pit, and the foundation pit support changing and inner support dismantling construction structure further comprises a fixing assembly used for clamping the inner supporting rod. And the adjusting assembly is used for adjusting the position of the fixing assembly and is arranged on the vehicle body. The device has the advantages that when the inner supporting rod in the foundation pit is dismounted or replaced, the participation degree of personnel can be reduced, the automation degree is improved, and the labor intensity of the personnel is reduced to a certain extent; in addition, through the arranged fixing assembly, the inner supporting rods of various sizes can be fixed, and the use flexibility is improved.

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.

The present invention relates to a 3D printing support removal system, which is characterized in that it includes: a workbench, a detection module, a control system, a manipulator and an end-point support removal actuator. The control system is configured to obtain the support removal area position information of the product to be processed and its corresponding actual operation coordinates based on the digital model of the product to be processed established or read by the detection module; the manipulator guides the end-point support removal actuator on the manipulator to actively touch the product to be processed and perform support removal operations on the product to be processed based on the actual operation coordinates corresponding to the real-time support removal area position information. Compared with the existing technology, the advantage of the present invention is that the entire support removal process can be mechanically automated, replacing human operation, and reducing labor and production management costs. Compared with manual labor, it has efficiency and accuracy advantages, effectively improving the deep processing quality control capabilities after 3D printing, and has been promoted in the industry with certain lean effects.

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 application discloses a pre-grouting reinforcement method for surrounding rock of a support-removing passage of a fully-mechanized coal mining face, belongs to the technical field of surrounding rock stability control, and comprises a working face transportation roadway and an air return roadway, grouting holes are arranged in the working face, and the grouting holes on each side are divided into shallow holes, medium-deep holes and deep holes; ultra-fine cement slurry is injected into the working face through the shallow holes, the medium-deep holes and the deep holes, and full penetration of coal and rock bodies is realized; the shallow holes, the deep holes and the medium-deep holes are cross-drilled and grouted; after grouting is completed, corresponding reinforcement structures are formed; after a coal mining support reaches a stop mining line and forms a support-removing passage, the coal wall and the roof are both pre-reinforced coal and rock bodies; on the basis of pre-grouting reinforcement, proper anchor rods and anchor cables are arranged on the coal wall and the roof of the support-removing passage. The application reinforces the coal and rock bodies in the support-removing passage region in advance through advanced pre-grouting, improves the strength and the bearing capacity of the coal and rock bodies in the stop mining line region, and provides a safety guarantee for subsequent safe support removal.

An apparatus and method for removing support material from and / or smoothing surfaces of an additively manufactured part is disclosed. The apparatus may include a chamber, a support surface within the chamber, one or more nozzles within the chamber, a tank positioned below the nozzles, and a vision system. The vision system includes one or more cameras and other imagery obtaining sensors located in the chamber. The cameras and sensors obtain imagery of the additively manufactured part as it is being sprayed to finish the part. The imagery is displayed on a display panel located outside the apparatus or stored for later playback.

This invention discloses a method for cold bending a small-diameter steel pipe with dry ice internal support, comprising the following steps: S1, Dry ice core preparation: cylindrical dry ice matching the inner diameter of the steel pipe is selected, with the dry ice diameter smaller than the inner diameter of the steel pipe; S2, Pipe pretreatment: the two ends of the steel pipe to be bent are cleaned and dried; S3, Dry ice filling: the cylindrical dry ice is sequentially filled into the inside of the steel pipe in sections, so that the dry ice forms a continuous and dense internal support column inside the pipe. Both ends of the steel pipe are sealed with sealing plugs to prevent the dry ice from shifting or prematurely sublimating and leaking out during the bending process. At least one sealing plug has a vent hole; S4, Cold bending: the steel pipe filled with dry ice is fixed to a bending fixture, and the steel pipe is slowly bent to the required angle using mechanical assistance; S5, Internal support removal: after bending, the sealing plugs at both ends are removed; S6, Finished product: a bent pipe with a smooth inner wall, round cross-section, no weld seams, and no collapse is obtained.

The application discloses a kind of automatic support removal polishing methods of skin sandwich workpiece, for skin sandwich workpiece product dot matrix, rib plate and grid different support structure, utilize manipulator, with polishing path travel tool library in the call of corresponding different tools, replacement and corresponding different parameter package are carried out to support removal polishing, and in the polishing process, on-line monitoring surface state, control support removal polishing parameter.Different support type full-path automation is removed and polished, and the operation process is more stable, the quality controllability is high, avoids individual factors and accidental factors to bring processing quality problem, adapts to small batch development and large-scale batch product continuous production, avoids that operating personnel is in dust, noise and other harmful factor conditions work for a long time.

1. The name of the design product: polishing equipment (TRT robot automatic support polishing system). 2. The use of the design product: the design product is used for automatic cutting and polishing of 3D printed parts. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses a method for installing a suspended downward-hanging type steel structure. The method specifically comprises the following steps that firstly, a stiff column is installed; secondly, a transfer truss is installed; 3, positioning, paying off and supporting installation are carried out; fourthly, a lower-layer steel structure is installed; 5, correcting the structure; sixthly, a profiled steel sheet is installed, and a steel pipe column support is dismantled; the transfer truss is arranged on the upper layer of the multi-layer steel structure to share the load of the multi-layer steel structure, stability and safety of the whole structure are guaranteed, meanwhile, the lower layer steel structure is sequentially installed from bottom to top in the mode that lower supporting replaces lower hanging, after lower layer construction is completed, the lower layer steel structure can serve as a construction platform of the upper layer, construction operation is simplified, and construction efficiency is improved. And the construction efficiency is effectively improved.

The invention relates to the field of additive manufacturing, in particular to a method for removing a support of a laser additive manufacturing thin-wall special-shaped curved surface part, application of the method and an auxiliary device for removing the support. According to the removing method, the shape-following main body structure and the water cooling device are manufactured to form the support removing auxiliary device, air cooling and liquid cooling are synchronously conducted on the part in the support removing process, the temperature of the part is reduced, thermal stress is reduced, large-size deformation of the part can be restrained, and the forming quality is improved. Meanwhile, by designing the shapes, sizes and the like of the support removal auxiliary device and the water cooling device, the machining amount is minimum and the used materials are minimum while the function is fully played. And meanwhile, the placement position of the part in the selective laser melting additive manufacturing process is designed, so that the support is only added to one side of the part, and the removal method is better adapted. According to the method, the deformation tendency of selective laser melting additive manufacturing parts is reduced, and the forming quality is improved.

The present invention discloses a titanium alloy closed impeller laser selective melting non-inner support forming method; It relates to the closed impeller manufacturing technology field, including: step one, establishing a three-dimensional model of the closed impeller; step two, setting the closed impeller forming process parameters, the number of sintering layers on the lower surface of the closed impeller is 20 layers, the laser power is 60W, the scanning speed is 1200mm / s, the scanning pattern is patternless, the laser power filled in the closed impeller is 190W, the scanning speed is 1200mm / s, and the scanning pattern is a strip with a width of 0.8mm; step three, forming the three-dimensional model in a laser selective melting device to obtain a closed impeller with a substrate and a bottom support; step four, after forming is completed, the formed product is post-processed to obtain a titanium alloy closed impeller without internal support. There is no internal support in the processing and forming process of the present invention, so the internal support removal step is omitted, the closed impeller forming success rate is improved, and the cost reduction and efficiency improvement purpose is achieved.

The utility model provides a support removing force test tool comprising a loading member and a clamping assembly arranged on the loading member. The clamping assembly comprises a first clamping piece and a second clamping piece; the first clamping piece is provided with a first surface, and a first groove hole is formed in the first surface. The second clamping piece is provided with a second surface, and a second groove hole is formed in the second surface. The first clamping piece is rotatably connected with the second clamping piece so as to allow the first surface and the second surface to be separated or at least partially clung to each other; the first slotted hole and the second slotted hole are spliced to form a mounting hole when the first surface and the second surface at least partially abut against each other. The clamping assembly is used for clamping the support system when the removal force test is carried out on the support, so that man-made influences can be reduced in the test process, and the test process is more stable and more reliable.

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 relates to the technical field of supports, in particular to a safe demolition control method for a support system with an arch swivel bridge, which comprises the following steps of: establishing a three-dimensional model of an arch bridge-support system by adopting finite element software based on initial parameters of the bridge and the support, and calibrating parameters of the three-dimensional model to enable the model to be consistent with an actual structure; the method comprises the following steps: calculating axial force distribution of a bracket system in a three-dimensional model based on the three-dimensional model, planning a bracket dismantling sequence according to an axial force distribution calculation result, sequentially removing brackets from the bracket system according to the planned dismantling sequence, performing axial force distribution iterative calculation after each bracket removing operation, and monitoring elevation change in a dismantling process in real time. And it is ensured that the accumulated settlement amount does not exceed a preset threshold value, so that the problems that due to the fact that the dismantling sequence is asymmetric, structural stress unbalance is caused, eccentric loads are generated, local stress concentration or torsion is caused, and then elevation changes or cracks are caused are solved.

The utility model relates to the technical field of building construction, and particularly discloses a green, environment-friendly and rapid deep foundation pit support dismounting and noise reduction structure which comprises a first supporting frame and a second supporting frame, the first supporting frame is arranged in a deep foundation pit and abuts against the side wall of the deep foundation pit, and the second supporting frame comprises a supporting pile, a first connecting beam and a second connecting beam; the supporting pile is vertically arranged in the deep foundation pit, the two ends of the first connecting beam are detachably connected with the first supporting frame and the supporting pile correspondingly, and the two ends of the second connecting beam are detachably connected with the side wall of the deep foundation pit and the supporting pile correspondingly. The deep foundation pit supporting structure has the effect that the problem that noise is large when an existing deep foundation pit supporting structure is dismantled is solved.

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 present application relates to the field of laser additive manufacturing, in particular to a support removal method for laser additive manufacturing of thin-walled ring structure parts and application and a support removal auxiliary device. The support removal method for laser additive manufacturing of thin-walled ring structure parts provided by the present application can monitor the deformation amount of the part in real time during the support removal process, can find deformation in time and inhibit large size deformation of the part through air cooling, and greatly improve the forming quality. In addition, the deformation amount of the part is collected in real time through a piezoresistive sensor, and the cooling process is synchronized, which is simple to operate, simple in structure, low in equipment cost, good in applicability, effectively solves the deformation and cracking problem of laser additive manufacturing of thin-walled ring structure parts, and greatly improves the manufacturing efficiency and forming quality. At the same time, the piezoresistive sensor, the position, size and shape of the air outlet hole of the temperature control system are designed, so that the processing amount is minimized and the use of materials is minimized while the function is fully exerted.

The application provides a laser selective melting forming method of a complex structure two-stage axial vortex device, and comprises the following steps: blank model formulation; part placement and support addition; the most end area of the outlet of the part convergence section is in a uniform annular expansion structure, at this time, the vortex device exists the case that the part printing growth direction is opposite to the scraper direction no matter the vortex device rotates by any angle along the central axis, that is, the scraper collision and the risk of powder rebound exist at this place; forming process; in the cavity and the blade height area of the vortex device part, a small layer thickness, low power and multiple outer contour scanning process is adopted; in the uniform annular expansion structure height area of the most end area of the outlet of the part convergence section, a lower powder scraping speed is adopted. The application has the following advantages: the surface roughness requirements of the blade and the cavity in the forming process are guaranteed, the powder cleaning after the printing is more thorough, the risk of the part scraper collision and the powder rebound is avoided, the support removal is facilitated, and the product qualified rate is effectively improved compared with the casting process.

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.