39results about How to "Avoid manufacturing errors" patented technology

The invention discloses a wafer-level fan-out type stack package process method, and the method comprises the following steps: pasting a dry photoresistive membrane on a high-temperature bonding glue layer on a light-transmitting temporary substrate; forming a plurality of blind holes, which are directly communicated with the high-temperature bonding glue layer, on the dry photoresistive membrane; implanting conductive metal poles in the blind holes after the dry photoresistive membrane is solidified; pasting an unpacked chip on the surface of the dry photoresistive membrane; carrying out the integrated injection moulding, and carrying out the grinding of the surface of a plastic packaged body till the bonding pad of the unpacked chip is completely exposed; manufacturing a rewiring layer, used for connecting the conductive metal poles and the unpacked chip, on the grinding surface of the plastic packaged body, wherein the rewiring layer is provided with miniature salient points obtained through reballing and reflow soldering; removing the light-transmitting temporary substrate and the high-temperature bonding glue layer, and obtaining a package unit; and obtaining a fan-out stacked package structure according to the package unit. The method simplifies the manufacturing technology of a fan-out type stack package, and reduces the manufacturing cost of the stack package.

The invention aims to provide an inkjet cartridge group and a method for detecting an installed inkjet cartridge group. The inkjet cartridge group is detachably installed on an inkjet printer and comprises a plurality of inkjet cartridges; the inkjet printer is communicated with the inkjet cartridges through equipment electric contacts which are arranged, and an optical receiver is arranged on the inkjet printer; a container electric contact, an information-storing device, a light-emitting part and a control part are arranged on each inkjet cartridge; and each control part controls the light of the light-emitting part when receiving the information which is sent out from the inkjet printer to control the light of any light-emitting part. According to the method for detecting the installed inkjet cartridge group, when a certain inkjet cartridge is detected, all the light-emitting parts send out lights. After the inkjet cartridge group and the method for detecting the installed inkjet cartridge group, the detection stability of the installed inkjet cartridges of the printer can be ensured completely, so that the phenomenon that installed inkjet cartridge detection error is caused by the manufacturing error of the light-emitting parts is avoided.

The invention relates to a method for testing the shrinkage cracking performance of a cement paste or a mortar. A molded test piece of a novel mold is adopted to carry out the cracking test to test the shrinkage cracking performance of the cement paste or the mortar. The mold comprises a pedestal, an outer mold and a steel cylinder; the steel cylinder is fixed on the pedestal; the outer mold is movably connected with the pedestal; and the outer mold is square, the steel cylinder is in the outer mold, and the steel cylinder which is not in the center of the square is in a unidirectional eccentric position. The ratio of the diameter of the steel cylinder to the inner side length of the outer mold, i, satisfies a case that i is greater than 0.5 and less than 1; and heights of the steel cylinder and the outer mold satisfy a case that the thickness of the molded test piece is equal to or greater than 5 times the largest particle size used in the test. The selection of the eccentric position of the steel cylinder is determined through carrying out finite element analysis on the molded test piece by ANSYS software. According to the invention, the cracking position can be foreseen, the test piece cracking can be accelerated, and the cracking can start from the outer interface.

The invention relates to a tooth profile modification design method and system for a cycloid gear of an RV speed reducer, and belongs to the technical field of design of the RV speed reducers. According to the tooth profile modification design method for the cycloid gear of the RV speed reducer, at least two factors of a manufacturing error, a mounting error, a system bearing deformation and a temperature variable are used as boundary conditions, and a modification amount is used as an optimization variable, so as to build a target function with a minimum transmission error and a minimum hysterisis error of the cycloid gear is built; and the target function is solved to obtain a tooth profile modification amount and a modification function curve of the cycloid gear. The tooth profile modification design method disclosed by the invention comprehensively considers at least two factors of the manufacturing error, the mounting error, the system bearing deformation and the temperature variable, and influences caused by the at least two factors on the modification amount is used as the boundary conditions to determine the modification amount, so that the obtained modification amount andthe modification function curve can pre-control the transmission error and the hysterisis error of the RV speed reducer under an actual working condition, and the aim of improving the motion precisionof the RV speed reducer is fulfilled.

The invention discloses a machine tool fixture, which comprises a bottom plate (1), a clamping device (2) and a positioning plate (3), wherein the bottom plate (1) is used for supporting a workpiece, the clamping device (2) is used for fixing the workpiece, and the positioning plate (3) provides a detecting reference surface (31) for the workpiece and is arranged between the bottom plate (1) and the clamping device (2). The center of the positioning plate (3) and the center of the workpiece are arranged on the axis of a spindle of a machine tool for machining the workpiece, and the distance from the center of the positioning plate (3) to the reference surface (31) is a reference distance. By the aid of the machine tool fixture, a machining coordinate system can be provided for the workpiece, the reference surface in the same coordinate system can also be provided, and the requirements of the workpiece on machining and detecting are met. Compared with the prior art, the machine tool fixture has the advantages that the machining coordinate system and a detecting coordinate system do not need to be built respectively, so that manufacture errors caused by coordinate transformation are avoided, and workpiece machining precision and workpiece machining efficiency are greatly improved.

A tooth mold retaining frame comprises an L shape seat; a pivotal block; a universal connector; a first positioning block; a second positioning block; and a first fine adjust unit. By using the first fine adjust unit, second fine adjust unit and the fine-adjust device, an upper teeth mold, and a lower teeth mold can move with respect to one another precisely. By a universal connector, the upper teeth mold can move three directionally and can lift or descend proportionally so as to avoid the error in manufacturing of the teeth mold. Thus the teeth mold can be made precisely and the condition of the teeth mold can be viewed conveniently. Furthermore, the teeth mold can be sent directly without needing to send the teeth frame. Thus, the manufacturer can make the teeth mold continuously without affecting the working time.

The invention relates to the technical field of reducers, and provides a low-noise automobile trunk reducer which comprises an inner gear shell, an input mechanism and at least two stages of planetary gear transmission mechanisms. The inner gear shell comprises an inner gear shell body and first helical teeth integrally formed on the inner wall of the inner gear shell body. A first-stage planet holder in the first-stage planetary gear transmission mechanism is integrally formed. The input mechanism comprises a first-stage sun gear. The first-stage sun gear, first-stage planetary gears, a second-stage sun gear and second-stage planetary gears are in helical tooth transmission with the inner gear shell body. In the low-noise automobile trunk reducer, the helical tooth structure and the inner gear shell body are integrally formed, and manufacturing errors caused by respective machining of the helical teeth are avoided; meanwhile, the first-stage planet holder is of an integral structure, so that the overall running precision and sealing performance of the reducer are improved, and assembling errors caused by combined assembling are avoided; all transmission gears are in helical tooth transmission, so that the overlap ratio is high, running is stable, and carrying capacity is large; and the reducer is more compact in structure and smaller in size.

The invention relates to a vehicle lighting device, and discloses a vehicle lamp optical element which comprises a light passing part (2) and a light emitting part (3), the light passing part (2) comprises a light entering surface (25), a first reflecting surface (21) and a second reflecting surface (22), and the first reflecting surface (21) and the second reflecting surface (22) are oppositely arranged. Light received by the light entering surface (25) is reflected by the first reflecting surface (21) and the second reflecting surface (22) in sequence and then is emitted to the light emitting part (3). In addition, the invention further discloses a vehicle lamp module and a vehicle. The vehicle lamp optical element is miniaturized, and the integration degree is higher.

The invention discloses a recyclable low-carbon portable building block die. According to the invention, a building block manufacturing die is standardized and can flexibly move and can be used in a factory or worksite. A die chassis is used as a carrier, can be suitable for storey height according to wall design and is composed of one or two pieces of originally-sized plywood or OSB. A load-bearing frame structured keel below the chassis adopts standard timber, and has consistent size with a building block stud or keel, and reacting force produced by nailing or screw-driving can be absorbed. A movable SIMPSON angle iron-shaped A34 or Z4 right-angle connecting piece can be installed on the surface of the chassis; one end is fixed to the plywood or OSB through screws; and a pair of connecting pieces forms a groove for containing the stud. Through the systematic management and regulation, stipulation and control and calibration of the stud, column and lintel positions, the die chassis can be lifted and put on a stand or turnplate and is ergonomic to minimize occupational injuries, fault waste or rework and raise efficiency and accuracy. Measurement is not required, block production man-hour is shortened and space usage is reduced.

The invention relates to the technical field of weaving, in particular to an ultrahigh-speed shuttleless narrow loom, and solves the problems of an incomplete part structure, large assembly and maintenance amount, low weaving accuracy and a low weaving speed of the conventional ribbon loom. The loom comprises a frame, a driving device arranged in the frame, and a weaving mechanism, wherein the weaving mechanism comprises a weft insertion mechanism, a heald frame mechanism, a pattern chain and a rocker arm; the weft insertion mechanism has an integral base split clamping structure; a tensioning pressure seam is arranged at a position where a weft insertion bearing is arranged and positioned; the two ends of an inner ring of the weft insertion bearing stretch out of an outer ring to be manufactured into a weft insertion small shaft; the heald frame mechanism is provided with a bearing seat frame and a clamping transverse heald frame which are vertically sleeved with each other; the bearing seat frame is provided with a plurality of linear bearings which correspond to one another coaxially up and down; an elastic steel wire heald with a heald eye is arranged in the clamping transverse heald frame; and the pattern chain is formed by connecting a double high pattern sheet, high and low chain sheets and a double low pattern sheet through tenon sheets and notches. The ultrahigh-speed shuttleless narrow loom has high weaving accuracy and a high weaving speed and is convenient to assemble and maintain.

The invention discloses a steering bracket assembly. The steering bracket assembly comprises a support plate, a steering tube column connecting component, a mounting region, an angle bogie mounting bracket, a clutch pedal mounting hole and a hanging device, wherein the steering tube column connecting component is arranged on the upper side of the middle part of the support plate; the mounting region is arranged at the middle part of the right side of the support plate, and an accelerator pedal mounting component and a brake pedal mounting component are arranged on the mounting region; the angle bogie mounting bracket is arranged at the lower end of the right lower side of the support plate; the clutch pedal mounting hole is formed in the left side of the steering tube column connecting component; and the hanging device is used for hanging a clutch control mechanism.

The invention discloses a plunger type leveling hydraulic system with a movable beam of a large hydraulic machine, and relates to the field of large hydraulic machines. The plunger type leveling hydraulic system with the movable beam of the large hydraulic machine comprises the movable beam, first leveling plunger cylinders, second leveling plunger cylinders, a first two-position two-way electromagnetic valve, a second two-position two-way electromagnetic valve, a third two-position two-way electromagnetic valve, a first two-position two-way plug-in proportional valve terminal, a second two-position two-way plug-in proportional valve terminal, a third two-position two-way plug-in proportional valve terminal, a fourth two-position two-way plug-in proportional valve terminal, a proportionalrelief valve and a hydraulic pump. The diagonal vertexes of the movable beam are provided with the four leveling plunger cylinders: the first leveling plunger cylinders and the second leveling plungercylinders. According to the plunger type leveling hydraulic system with the movable beam of the large hydraulic machine, the stroke of the plunger cylinders is twice of the length of the cylinders, the height of equipment is prevented from being too large, and the system has the advantages of being small in size, low in pressure loss and precise in flow control.

The invention discloses a satellite high-precision centroid measurement method combined with a laser tracker, and the method comprises the steps: obtaining the centroid position I1 of a combination ofa satellite and a centroid measurement tool in a centroid measurement platform coordinate system in a vertical state of the satellite through the measurement of a centroid measurement platform duringthe measurement of the transverse centroid of the satellite; using the mass center position of the no-load mass measurement tool in the vertical state to obtain the transverse mass center of the satellite through calculation; when satellite longitudinal centroid measurement is carried out, the centroid position I5 of a combination of a satellite and a quality measurement tool in a horizontal state under a quality measurement table coordinate system is obtained through measurement of a quality measurement table, and the satellite longitudinal centroid is obtained through calculation in combination with the centroid position of the no-load quality measurement tool in the horizontal state. By means of the method, the satellite installation error and the tool deformation error are reduced, and the measurement precision of the satellite mass center is remarkably improved.

The invention relates to a permanent magnet motor, which comprises a stator, a rotor and an end cover, and is characterized in that the stator comprises a plurality of unit sheets, the plurality of unit sheets are laminated and fixed by welding, the end cover is fixed on the end surface of the stator, the rotor is connected with a rotating shaft, and the rotating shaft is arranged on the end cover. The motor has the advantages that the concentricity error between the stator and the rotor is greatly reduced, the running performance of the motor is improved, and shaking and movement in the rotating process of the rotating shaft are reduced.

The invention discloses an optical disc grabbing device of an optical disc printing and burning machine. The device comprises a shell sheet metal part, a motor is arranged at the top of the shell sheet metal part, the motor is connected with a first synchronizing wheel through the shell sheet metal part, the first synchronizing wheel is connected with a second synchronizing wheel through a belt, and a second connecting wheel is arranged on a fixed sheet metal part. The fixed sheet metal part is arranged at the bottom of one side of the shell sheet metal part, the upper end and the lower end of the shell sheet metal part are fixedly connected with a polish rod through buckles, the polish rod is sleeved with a linear bearing joint, and the linear bearing joint is connected with a grabber through a screw. According to the device, manual cost is saved, the job schedule is quickened, a single optical disc can be grabbed rapidly and precisely each time, and the device avoids manufacturing errors caused by manual disc grabbing and placing, saves time and labor, avoids fingerprints, oil stains and dust left on the optical disc when the disc is manually grabbed and placed, increases the success rate and the quality of optical disc burning, enables the interiors of a burning machine and a printer to be clean and tidy, does not waste electricity, does not need manual work when control software is used, and is simple to operate and convenient to use.