10results about How to "Avoid precision errors" patented technology

The utility model belongs to the technical field of sorting equipment, and particularly relates to modularized high-speed sorting equipment which comprises a rack, a conveying mechanism, a first optical sorting machine, a first discharging unit, a second optical sorting machine, a second discharging unit and a third discharging belt conveyor. The two high-speed optical selectors, the matched storage covers, the matched discharging belt conveyor and the matched air injection device are integrated in the same rack module to form a compact sorting unit, so that the precision error caused by on-site scattered installation is avoided, and the equipment deployment period is greatly shortened; the technical problems that traditional multi-stage sorting equipment is large in size, difficult to disassemble and assemble and high in maintenance cost are solved.

The invention relates to a multilayer PCB (Printed Circuit Board) wiring search algorithm based on a millimeter wave image, and aims to solve the problems that the resolution is limited and the calculation cost is too high in a grid A * algorithm on which multilayer PCB wiring depends, and the A * algorithm under a meshless method is not suitable for multilayer wiring. The invention provides an analysis obstacle avoidance exploration algorithm model based on a millimeter wave image. According to the model, on the basis of heuristic path optimization based on a grid A * algorithm, barriers and wiring areas are marked through pixel coordinates of millimeter wave images, a plurality of groups of barrier vertex pixel coordinate sets are generated, and local barriers are dynamically monitored and geometrically filtered; in combination with multi-pin network wiring optimization, generation of acute-angle corner wiring is avoided, signal transmission efficiency is enhanced, and the number of via holes is reduced. A cross-layer projection method is introduced into multi-layer PCB wiring, and a starting point, a barrier vertex and a barrier end point are marked, so that the total wiring length is reduced and the number of via holes is reduced to reduce the cost of the multi-layer PCB during PCB cross-layer wiring by an analysis and obstacle avoidance exploration algorithm of a millimeter wave image, and the interlayer connection complexity and the delay and electromagnetic interference of additional signals are reduced; therefore, the method is suitable for the multi-layer PCB drawing design of a high-frequency electronic circuit.

The utility model discloses a workbench for an automatic cutting machine with a fixed tool magazine, which belongs to the technical field of cutting processing equipment and comprises a hanging frame and a movable frame, the movable frame is mounted on the lower portion of the hanging frame through a horizontal movement driving mechanism, and the horizontal movement driving mechanism drives the movable frame to move horizontally and linearly. The N clamping and grabbing units are installed on the moving frame in the horizontal linear direction at intervals, and the distribution direction of the clamping and grabbing units is perpendicular to the moving direction of the moving frame. According to the workbench for the automatic cutting machine with the fixed tool magazine, the space utilization rate, the tool changing efficiency and the like can be improved, the overall performance of a cutting machining center can be effectively improved, and an efficient, flexible and accurate solution is provided for modern cutting machining.

The invention discloses a full-automatic intelligent optical fiber grinding machine which comprises a rack, a part taking shaft mechanism and a four-corner full-automatic pressurizing grinding machine, a bottom box is arranged on the rack, a working box is fixedly installed above the bottom box, a side box is fixedly installed on one side of the working box and the bottom box, a top box is fixedly installed at the top of the side box, and a touch screen master controller is fixedly installed on the top box; the invention discloses a full-automatic intelligent optical fiber grinding machine. The linear module is fixedly mounted on the side box; automatic transfer of an optical fiber clamp is achieved through the linear module and the disc taking mechanism, automatic laying and recycling of abrasive paper are completed in cooperation with the paper taking mechanism and the waste paper recycling mechanism, linkage operation of the four-corner full-automatic pressurization grinding machine and the air drying ultrasonic cleaning mechanism is achieved, and manual intervention is not needed in the whole process from grinding to cleaning and air drying; the labor intensity is greatly reduced, the production efficiency is improved, the precision error and quality fluctuation caused by manual operation are avoided, and the grinding consistency and stability of the end face of the optical fiber connector are ensured.

The utility model discloses a vertical hydraulic clamp, include: circular base, annular cylinder wall, vertical clamping mechanism and hydraulic distribution valve, circular base is installed in the rotary workbench, and annular cylinder wall is ringed in circular base, annular cylinder wall and circular base surround and set up clamping work cavity, the rotary workbench can make circular base and annular cylinder wall rotating activity, annular cylinder wall is provided with the vertical mounting plate of the board piece, vertical clamping mechanism and hydraulic distribution valve are installed in vertical mounting plate, vertical clamping mechanism includes a plurality of hydraulic clamping subassembly connected with hydraulic distribution valve, the utility model discloses, and the clamp whole is directly installed on the rotary workbench through circular base, can realize the synchronous rotation of workpiece and clamp under the clamping state, the design makes the hydraulic clamping force direct action on the vertical or inclined facade of workpiece, and the vertical posture of perfect adaptation large -scale workpiece is placed, and the rigidity and the anti -vibration of clamping under the strong cutting working condition are ensured.

The invention relates to the technical field of machine manufacturing, and discloses a press machine eccentric gear-based tooth hole coaxial positioning device, which comprises a workbench and a coaxial positioning mechanism, a rotating table used for rotationally supporting the eccentric gear body and a gear motor used for rotationally driving the rotating table are installed on the top of the workbench. The coaxial positioning mechanism comprises an axial positioning unit and an outer circle positioning unit. The axial positioning unit comprises a positioning shaft barrel used for being inserted into an eccentric hole or a center hole of the eccentric gear body. An axial positioning unit and an outer circle positioning unit are adopted for cooperative operation, the axial positioning unit is inserted into an eccentric hole or a center hole of an eccentric gear body through a positioning shaft barrel to achieve preliminary positioning, and axial and radial displacement of the gear is effectively limited in cooperation with elastic pressing of an end face pressing piece; through fine adjustment and calibration of the air cylinder, the coaxiality of the gear holes is greatly improved through a dual-positioning mechanism, precision errors caused by gear deviation in the machining process are avoided, and the machining quality of the gear holes is guaranteed.

The utility model relates to the field of food processing devices, and discloses a quantitative supply food fermentation device which comprises a fermentation tank, a feed pipe penetrates through the upper surface of the fermentation tank and is fixedly connected with the upper surface of the fermentation tank, a dust cover is arranged on the upper surface of the feed pipe, and a discharge pipe penetrates through the lower surface of the fermentation tank and is fixedly connected with the lower surface of the fermentation tank. An electromagnetic valve is arranged in the middle section of the discharging pipe, a stirring assembly is arranged in the fermentation tank, and a quantitative discharging mechanism is arranged on the upper surface of the fermentation tank. The quantitative discharging mechanism comprises a feeding assembly, and the feeding assembly comprises a transition barrel. According to the utility model, through the arrangement of the quantitative blanking mechanism, the hand wheel is rotated to drive the screw rod to adjust the positions of the sliding rod and the sealing gasket, the single fermentation liquid adding amount can be accurately controlled in combination with the scales of the transition barrel, the precision error caused by artificial experience adding is avoided, and after the adjustment is completed, when the same amount of fermentation liquid is added subsequently, repeated adjustment is not needed, so that the operation is convenient and fast; the fermentation effect and the food quality can be guaranteed.

The invention discloses a bridge engineering BIM (Building Information Modeling) lightweight conversion and visualization method and system. The method comprises the following steps: analyzing a. 3dxml file, and constructing a model structure tree with a father-child hierarchical relationship; extracting vertex coordinates, normal vectors and texture coordinates from Vertex Buffer nodes of the. 3Drep file in sequence to serve as vertex attribute data of the triangular mesh; extracting a vertex index type and a color attribute from the Faces node; reconstructing a triangular mesh topological structure according to the vertex index type to obtain a triangular patch set with a preset normal direction; and mapping the model structure tree into a Node hierarchical structure in a glTF format, and respectively mapping the triangular patch set, vertex attribute data and color attributes into data structures in a glTF format. According to the invention, a retriangularization process is avoided, and the conversion efficiency is improved.

The invention provides a dental restoration manufacturing method based on prefabricated teeth and a CADCAM technology, discloses a dental restoration manufacturing method based on prefabricated teeth and CAD / CAM equipment, and belongs to the technical field of dental restoration. The method comprises the following steps: pre-defining a processing tool with a positioning reference function; selecting prefabricated teeth based on an intraoral scanning model of a patient, and designing digital restoration denture data; generating three-dimensional data (the cavity is obtained by normal inversion of the surface of the false tooth) of the false tooth type box; the machining tool, the mold box and the repaired false tooth are combined, and a tissue surface cutting path is generated; manufacturing a real object type box through 3D printing or cutting; inserting a prefabricated tooth, injecting a gingival material, and solidifying to form a prosthesis blank; and the tissue surface is cut and machined through CAD / CAM equipment and is polished, and preparation is completed. The advantages of stable quality and low cost of prefabricated teeth and the advantages of high efficiency and accuracy of the CAD / CAM technology are integrated, the bonding accuracy error is avoided, the personalized adaptability is high, the method does not depend on the manual skill of technicians, batch production can be achieved, and the prepared prosthesis is accurate in shape and natural in color and can meet the functional and aesthetic requirements of patients.

The utility model relates to cable test technical field, and disclose a kind of jacking change handset for cable feeding, including inner support chuck and outer clamping chuck, the inner support chuck is supported and is gripped from cable insulation layer inside outward, and the outer clamping chuck is gripped to cable insulation layer outside inward;Outer clamping chuck is fixedly installed on upper table top, the bottom of inner support chuck is provided with lifting device, for driving inner support chuck along the axial lifting of outer clamping chuck.The utility model provides a kind of jacking change handset for cable feeding, improve detection efficiency, reduce artificial cost and reduce the influence of human interference factor on measurement result, avoid the precision error brought by secondary clamping, in actual implementation, can utilize laser to assist, and actual lifting precision can be controlled at ±0.01mm.