41results about How to "Easy machining accuracy" patented technology

In a color wheel comprising plurality of color filter segments, one of the filter segments consists of a sector portion, and a circular core portion which is formed intergrally at the inner circumferential area of the sector portion, and which is located at the center of the wheel assembled. The inner circumferences of the remaining filter segments are fitted directly to the outer perimeter of the circular core portion of the one segment, whereby the geometric accuracy of the color wheel can be achieved. Also, the alignment process of the filter segments for preventing the color wheel from generating vibrations and noises at the time of spinning at high speed can be simplified or even eliminated thus preventing the number of manufacturing processes from increasing.

The invention belongs to the technical field of printed circuit boards, and concretely relates to a multichip typesetting substrate. The multichip typesetting substrate comprises a frame (2) and multiple child substrates (3), the frame (2) and each child substrate (3) as well as the child substrates (3) are connected through multiple connecting mechanisms (8), and each connecting mechanism (8) comprises at least a mechanical limiting connection mechanism (4) which is used for limiting the child substrate (3) to move in two directions perpendicular to the surface of the frame (2). The invention also discloses a manufacturing method of the multichip typesetting substrate. The multichip typesetting substrate disclosed by the invention can reliably limit the child substrates to move in two directions perpendicular to the frame (2), therefore, the connecting strength between the child substrates, or between each child substrate and the frame, is greatly improved.

The invention discloses a turn-over driving device of a vehicle-mounted flat-panel display and relates to an electric driving device for changing the supporting state of a display. The turn-over driving device of the vehicle-mounted flat-panel display is provided with a motor and a deceleration mechanism which comprises two rectangular box bodies and two worm gears and two worms. A rotating shaftof the first worm in the deceleration mechanism is a transverse input shaft, a rotating shaft of the second worm gear in the deceleration mechanism is a transverse output shaft, and the two shafts areparallel to each other. Longitudinal bearings are mounted on a lower straight rod part and an upper straight rod part of the two sides of an arc surface thread part of the second worm correspondingly, transverse bearings are mounted on a left circular rod part and a right circular rod part of the two sides of a working part on the second worm gear correspondingly, wherein the working part is provided with a plurality of arc surface tooth grooves along the circumference surface, and the arc surface thread part of the second worm is engaged with the arc surface tooth grooves of the second wormgear. The deceleration mechanism is provided with the two rectangular box bodies, the first worm and the first worm gear are mounted in the first box body, the second worm, the two longitudinal bearings of the second worm, the second worm gear and the two transverse bearings of the second worm gear are mounted in the second box body, and thus machining and production are facilitated.

A main machine base of a sizing mill for manufacturing seamless steel pipe features the existing C-shaped machine base is divided into lower machine base, upper transverse beam, supporting arch, and laterial supporters, and all of them are connected by the connecting parts to become a combined body.

The invention relates to a simulation and test system for excavation of a narrow foundation pit in a high gravity field. The simulation and test system is composed of a foundation pit simulation system, a foundation pit supporting system and a measuring system, the foundation pit simulation system comprises a model box, a separating plate and an adjusting rod, the separating plate is vertically located in the model box, one end of the adjusting rod is connected to the separating plate, the other end of the adjusting rod abuts against the inner wall of the model box, the adjusting rod is used for adjusting the position of the separating plate, a space between the separating plate and the model box is used for containing test soil, and the test soil is formed by consolidating mud in the highgravity field; and the foundation pit supporting system includes two retaining walls arranged in parallel with excavated trenches and a supporting rod connected between the two retaining walls, the supporting rod is used for adjusting the distance between the two retaining walls, and the measurement system is used for measuring the strain of the retaining walls and conducting formation settlementmeasurement and changes in the displacement field. The simulation and test system can comprehensively measure various aspects of affects of foundation pit excavation in the high gravity field, can realize full excavation of a foundation pit and can achieve simulation of support adding.

A guide convex portion is formed on a base plate in parallel to an illumination optical axis. Further, a fixed-side supporting member is provided in the base plate. A first opening is formed in an upright portion of the fixed-side supporting member. A slide supporting member can be provided on the base plate. A second opening is formed in the upright portion of the slide supporting member. By inserting a tapered rod into the second opening at its light incidence side and by moving the slide supporting member along the aforementioned guide convex portion, the slide supporting member is stopped at a predetermined position and, at this position, the slide supporting member is fixed.

The invention discloses a tooth profile bending assembly for anchoring part machining. The tooth profile bending assembly for anchoring part machining comprises a bottom disc and a bending head. A through hole, a first mounting hole, a second mounting hole and multiple fixing holes are formed in the bottom disc. The bending head comprises a head portion, a neck portion and a rotary shaft which aresequentially connected. A first tooth block and a second tooth block are arranged on the head portion. A bending gap is formed between the first tooth block and the second tooth block. The head portion can pass through the through hole, and the diameter of the neck portion is larger than the internal diameter of the through hole. A first bending roller is mounted on the first mounting hole, and asecond bending roller is mounted on the second mounting hole. The rotary shaft can drive the head portion to rotate in the through hole. The tooth profile bending assembly for anchoring part machining can efficiently machine anchoring parts.

The invention relates to the technical field of metal material processing equipment, in particular to a multi-directional repeated extrusion deformation processing device and a processing method for amagnesium alloy profile. The processing device comprises a male die, an upper female die and a lower female die; the upper female die is provided with a die cavity; the die cavity is composed of a male die channel and an extrusion channel; the male die channel is in a cuboid shape; the extrusion channel is in an inverted regular quadrangular frustum pyramid shape; the upper female die and the lower female die are connected, positioned and combined into the female die through screws and pins; and the male die is arranged in the male die channel and is matched with the male die channel. The processing device provided by the invention is simple in structure, convenient to operate, beneficial to extrusion sample demolding, capable of preparing a large number of high-performance magnesium alloy products of various sizes, capable of improving the production efficiency and the processing precision, easy to disassemble, convenient to maintain, small in abrasion to the male die under the condition of long-time extrusion production, and the magnesium alloy processed by the device has good strength, plasticity and corrosion resistance.

The invention discloses novel pulverized coal metering and conveying equipment which comprises a feeding bin and a drive motor. A drive shaft is connected to the drive motor. The feeding bin is provided with a feed opening and a discharge opening which directly face each other. The drive shaft is inserted into the feeding bin and provided with a feeding gear. The appearance of the feeding gear is just matched with the shape of an inner cavity of the feeding bin. Herringbone teeth are arranged on the outer wall of the feeding gear. The problems that the occupied area is large, and maintenance is difficult are solved; and the novel structure is adopted, and a mechanism achieving conveying through the herringbone tooth gear is adopted. Under the condition that the conveying quantity is not changed, the novel gear conveying mechanism is adopted, and equipment replacement can be conveniently carried out in limited space. The herringbone gear structure is adopted, the shaft becomes shortened, the machining precision and mounting precision are easier to guarantee, and the platform cost is reduced.

The invention discloses a machining device for an inner groove of a lathe. The machining device for the inner groove of the lathe comprises a clamping piece, a body, a groove depth control device, anaxial positioning size control device and a clamping device; a long rectangle convex strip is arranged on the left side of the clamping piece; the upper surface and the lower surface of the right sideof the clamping piece are each provided with a rectangular guide rail convex strip in the front-back direction; a guide rail groove in the front-back direction and in sliding fit with the rectangularguide rail convex strips is formed in the right side of the body; the groove depth control device is installed on the left side of the body and rightwards penetrates a first through hole to finally stretch into a combined groove in the middle portion of the right side face of the clamping piece; the clamping device is installed on the portion, located on the left side of the body, of the groove depth control device; and the axial positioning size control device is installed on the clamping device. The machining device for the inner groove of the lathe facilitates size control, is convenient and fast to operate, can guarantee the machining precision and can also improve the machining efficiency.