23results about How to "Avoid precision errors" patented technology

The invention discloses a platform and a method for testing the response time of infrared alarm and confrontation equipment, and belongs to the technical field of infrared alarm and confrontation. Comprising an electric control system, target simulation equipment and a tested product, the target simulation equipment and the tested product are connected with the electric control system, the tested product is infrared alarm and confrontation equipment, and multiple sets of target simulation equipment are arranged in a view field of the tested product in a sliding mode in the circumferential direction; the target simulation equipment can emit medium-wave infrared light required by the infrared alarm sensor to a tested product, and can capture interference energy emitted by the tested product at the same time; and the electric control system carries out unified time service on the target simulation equipment and the tested product. According to the invention, the problems of low reaction time acquisition precision and the like caused by the fact that the traditional reaction time test method cannot automatically acquire each timestamp and the reaction time needs to be calculated and evaluated by combining the recorded picture with the timestamp through manual playback are solved.

The invention discloses a precise hole lug piece and a manufacturing method of a high-edge-strip titanium alloy rib part, and relates to the technical field of forging. According to the specific technical scheme disclosed by the invention, the method comprises the steps of reaming a process hole, clamping a high-edge strip surface, roughly machining a part lug surface, roughly machining the part high-edge strip surface, naturally aging, semi-finishing the part lug surface, finishing the part lug surface, reaming a side wall precision hole of the part lug surface, semi-finishing the part high-edge strip surface, and finishing the part high-edge strip surface. And measuring the size of the part, and removing the process patch and the patch on the two sides. The machining method effectively solves the problem of machining precision holes in the side walls of the lug pieces of the parts, the problem of vibration of the high-edge-strip parts in the machining process and the problem of residual closed angles of the parts, meanwhile, deformation of the parts in the machining process can be controlled, and then the size and precision of the parts are guaranteed.

The present invention provides a rear-mounted precision speed shifting device based on linear transmission, characterized in that the device comprises a finger shifter installed on a bicycle handlebar, a shifting mechanism installed on a rear wheel of the bicycle, and a steel wire rope connected to the finger shifter at one end and to the shifting mechanism at the other end, wherein the shifting mechanism comprises a gear shifter connected to the steel wire rope and a transmission connected to the gear shifter; when a user shifts the finger shifter, the steel wire rope drives the gear shifter on the rear wheel, thereby driving the transmission connected to the gear shifter to shift gears, shortening the steel wire rope transmission distance between the gear shifter and the shifting mechanism, thereby avoiding precision errors caused by friction in the linear transmission process of the gear shifter, and having a greater fault tolerance value for the input of the gear shifter without modifying the gear shifting accuracy.

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.

A multi-reflection-cavity accurate modeling method based on a vector method is high in accuracy, high in universality, suitable for modeling of multiple types of reflection cavities, capable of solving precision errors caused by a traditional paraxial approximation method, and significant to improvement of reflection cavity design accuracy and reflection cavity measurement precision. Comprising a first front reflection mirror surface M1 and a second rear reflection mirror surface M2 which are arranged along the z axis of a Cartesian rectangular coordinate system and are opposite to each other, a light through hole is formed in the middle of the first front reflection mirror surface M1, an incidence point A0 and an emergence point in the light through hole are coordinate origins O, a first reflection point A1 and a third reflection point A2 are arranged on the second rear reflection mirror surface M2, and the first reflection point A1 and the third reflection point A2 are opposite to each other. The relative distance between the first front reflection mirror surface M1 and the second rear reflection mirror surface M2 is d, the second rear reflection mirror surface M2 comprises the following parameters: delta, I, S, R and N, delta is a relative rotation angle, I is a laser incidence vector, R is a laser reflection vector, and N is a mirror surface direction vector.

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 grinding machine transverse feed ball screw pre-tensioning structure which comprises a screw rod installed on a bearing seat I and a bearing seat II through a bearing assembly I and a bearing assembly II, the bearing assembly II comprises a pair of angular contact ball bearings which are installed on the screw rod and located in a bearing hole II, and the opposite angles of the angular contact ball bearings are in contact. An inner ring and an outer ring of an angular contact ball bearing are limited in a shaft step of the lead screw and a hole step of a bearing hole II respectively, a locking nut II screwed on the lead screw limits the inner ring of the other angular contact ball bearing, and a gland installed on a bearing seat II limits the outer ring of the angular contact ball bearing. The first bearing assembly comprises a deep groove ball bearing and a thrust bearing which are installed on the lead screw and located in a first bearing hole, an inner ring of the deep groove ball bearing is limited to a shaft step of the lead screw, a gasket is arranged between the thrust bearing and the deep groove ball bearing, the gasket is limited to a hole step of the first bearing hole, and the thrust bearing is pressed on the gasket through a first locking nut screwed on the lead screw. And an interval of 2mm is reserved between the gasket and the end face of the deep groove ball bearing.

The utility model discloses a three -dimensional punch -die, including die base and die forming seat, be provided with forming cavity on the die forming seat, and place the product to be processed in forming cavity, the both sides and top of die base are provided with first punch structure and second punch structure respectively, through first punch structure and second punch structure to the product to be processed in forming cavity three -dimensional punch at the same time, have reached the disposable forming's purpose, the bottom of die base is provided with the ejection structure, and the product of forming is taken out through the ejection structure. The utility model discloses through the first punch structure of die base both sides and the second punch structure of top, to the product to be processed front, back, upper three -dimensional pressure at the same time, significantly shorten the processing cycle, avoid the precision error of the positioning of multiple times.

The utility model relates to a top hammer outer circle grinding integrated clamp belongs to top hammer processing technical field. Top hammer outer circle grinding integrated clamp contains front chuck, rear chuck, first connecting piece and second connecting piece, and front chuck and rear chuck are oppositely arranged, and first connecting piece and second connecting piece exist detachably fixed connection, and front chuck is rotatively connected in first connecting piece, and rear chuck is rotatively connected in second connecting piece, the rotation axis of front chuck and rear chuck is coaxially arranged, and the one end center of front chuck is provided with front centre hole back to rear chuck, and the one end center of rear chuck is provided with rear centre hole back to front chuck. The utility model adopts integrated structure to realize the convenient centering of top hammer workpiece clamping, and remarkably improves production efficiency and yield.

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 present invention discloses a CNC machine tool workbench exchange device, including a workbench, a shell, and a bottom plate. A switching shaft is arranged on the bottom plate, and the upper end of the switching shaft is fixedly connected to a square block. Two workbenches are arranged on both sides of the square block. The workbenches are connected to the square block by a rotating propping assembly for switching. A control assembly is arranged under the switching shaft to control the rotation and lifting of the switching shaft. A shell is arranged outside the control assembly, and the shell is fixed on the bottom plate. The present invention sets a double workbench to cooperate with the switching shaft to switch between rough grinding and fine grinding. Each workbench can be separated from the exchange device, and the position and angle can be adjusted by the machine tool. There is no need to remove the parts separately for adjustment, thereby avoiding the precision error caused by repeated installation and disassembly, saving time, and improving processing efficiency. At the same time, the rotating propping assembly facilitates the transfer and separation of the workbench, and the control assembly ensures that the workbench does not rotate when it is separated, thereby avoiding the workbench from the machine tool.

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 present invention provides an integrated equipment for press-fitting and heating the vulcanization bushing of a stabilizer bar. The distance between two press-fitting and heating devices is adjusted by a distance adjusting device, so that it is convenient to vulcanize stabilizer bars of different sizes and specifications, thereby improving the practicability of the equipment. The temperature of the two press-fitting and heating devices can be controlled separately according to the temperature range set for vulcanization by a temperature control device, so as to improve the vulcanization effect of the bushing. The centering fixture is movably installed on the support seat, so different centering fixtures can be easily replaced according to stabilizer bars of different specifications. The upper press-fitting and heating component presses the stabilizer bar and the bushing on the lower press-fitting and heating component and heats them. The present application integrates the press-fitting and heating processes of the stabilizer bar bushing, can be formed in one step, reduces the transfer time at the press-fitting and heating stations, improves the processing efficiency, and can prevent the transfer of the stabilizer bar from causing precision errors, thereby ensuring the consistency and reliability of product quality.

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 present invention relates to the technical field of cold welding equipment, and in particular to a cold welding equipment for multi-layer composite silver contacts, comprising: a frame; a limit module, wherein the limit module is fixedly arranged on the frame, the limit module is provided with a limit seat capable of limiting and fixing a workpiece, and the limit seat is also provided with a limit groove for loading the workpiece; a guide module is fixedly arranged on the frame in a vertical state; the guide module is provided with a guide frame capable of positioning and guiding the silver contact and a first linear driver capable of driving the guide frame longitudinally close to or away from the limit module; the cold welding module is fixedly arranged on the frame in a vertical state and is located above the guide module; the cold welding module is provided with a cold welding head capable of moving along the guiding direction of the guide frame and capable of cold welding the silver contact to the workpiece; the present invention can not only actively suppress the deformation of the silver contact when welding the silver contact, but also can always maintain a uniform pressure to weld the silver contact.

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 invention discloses a metal part burr removing device for a logistics stacking machine, and relates to the technical field of burr removal, the metal part burr removing device comprises a workbench, supporting legs are fixedly installed at the bottom of the workbench, a support is fixedly installed at the top of the workbench, a first motor is fixedly installed at the front part of the workbench, and a second motor is fixedly installed at the rear part of the workbench; the transmission shafts are fixedly installed at the output end of the first motor, the two transmission shafts are in transmission connection through a conveying belt, a pushing device is arranged at the top of the workbench, a deburring device is arranged at the top of the workbench, and a collecting device is arranged at the top of the workbench. The pushing device comprises a first gear, a rotating rod, a second gear, a third gear, a rotating column, a fourth gear, an eccentric disc, a sliding column, a first push rod and a push plate, the push plate moves to push parts to the center of the equipment, the parts are kept at preset positions all the time, it is guaranteed that the burr removing effects of all the parts are the same, and therefore the production efficiency and quality are improved.

The invention discloses a three-dimensional monitoring substrate type fiber Bragg grating crack sensor and a dynamic analysis method thereof. The three-dimensional monitoring substrate type fiber Bragg grating crack sensor can monitor the set X, Y, and Z three-dimensional displacements of a measured surface respectively, and the three-dimensional monitoring data are monitored independently without interfering with each other; the three-dimensional monitoring substrate type fiber Bragg grating crack sensor is fixed on a relatively fixed surface, and a monitoring auxiliary tooling is fixed on the monitored surface, and an initial data model is established by mapping the three-dimensional relative positions of the relatively fixed surface and the monitored surface; the XYZ displacement of the detected surface is dynamically monitored in real time, and the X, Y, and Z three-dimensional displacement dynamic curves are respectively drawn in real time, and the data is imported into the dynamic model, and the displacement change is displayed in real time, and the historical change can be recorded. Therefore, the dynamic analysis method is intuitive and efficient in observing the displacement change, and can effectively provide a basis for structural health diagnosis.

The present invention discloses a nesting die-cutting machine, comprising a frame for carrying; a feeding mechanism, which is arranged on the frame for guiding feeding; a feeding mechanism, which is arranged on the frame for pulling the material strip and guiding the feeding; a die-cutting mechanism, which is arranged between the feeding mechanism and the feeding mechanism, and comprises an upper die and a lower die that open and close relatively; the upper die and the lower die are respectively equipped with an upper template and a lower template through an L-shaped limit block for die-cutting the material strip; a driving mechanism, comprising a cam driving assembly and a cam height adjustment assembly; the cam driving assembly is connected to the upper die driving connection for providing power for the upper die to intermittently press downward; the cam height adjustment assembly is connected to the upper die for adjusting the highest point of the upper die, thereby changing the die-cutting depth; compared with the existing nesting die-cutting machines, the present invention has the advantages of long service life, good die-cutting depth adjustment effect, convenient template assembly, and flexible alignment.

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.