43results about How to "Shape influence" patented technology

The invention discloses a method and a device for testing thermal performance of an LED radiator. The method is characterized in that a heating block end surface made of a pure copper material is taken as a heating surface to simulate an LED chip heat source; electric heating tubes are embedded in the heating block which is wrapped with a thermal insulating material, and heat generated by the electric heating tubes is almost completely transmitted to the copper block end surface; the tested radiator is placed between the heating surface and a screw rod, a heated surface of the radiator aligns to the copper block heating surface, and the screw rod is tightened to enable the radiator and the heating surface to be tightly contacted; and the simulated heat source and guide rods are all fixed on a rotatable rack and relatively rotate with a hinged hole as a center by means of respective positioning holes in the rotatable rack and support racks, so that the heat dissipation performance when the radiator is placed obliquely can be tested. The invention further provides the testing device used for the testing method. According to the method and the device for testing the thermal performance of the LED radiator, the application range is wide, the structure is simple, and parts are convenient to process and assemble.

The invention discloses an electric spark milling method of a micro three-dimensional part. The electric spark milling method comprises the following steps that a tool electrode having appropriate diameter is adopted; an electrical guiding rule and parameters are set according to the diameter of the tool electrode; a length loss rate and a discharging gap are determined; the tool electrode is subjected to predeformation; and milling programs for each electric spark numerical control layering of a work piece are established. Based on the shape characteristic of the tool electrode at a high frequency power source, the tool electrode actively deforms, then the deformed tool electrode is subjected to layering milling by adopting a continuous compensation process, and the influence of interlayer feeding processing on the shape of the tool electrode is eliminated through a preprocessed hole. Aiming at the shape change in a micro electric spark processing procedure, the electric spark milling method for keeping the shape of the tool electrode stable on the specific electrical guiding rule condition is provided, tool electrode shape constant loss is realized, the problem of shape change due to loss of the tool electrode in the micro electric spark processing procedure is solved, and a processing technique index reaches a higher level.

The invention relates to the technical field of 3D printing, in particular to a 3D printing device and a use method thereof. The 3D printing device comprises a base and transmission frames located ontwo sides of the base respectively, wherein rollers are arranged on the two transmission frames and connected through a material carrying film; a feeding mechanism and a molding mechanism are sequentially arranged above the material carrying film; the molding mechanism comprises a molding platform and a lifting mechanism used for driving the molding platform to move up and down; a light beam generating device is arranged below the material carrying film; and a screen is arranged between the material carrying film and the light beam generating device and is parallel and opposite to the moldingplatform. The 3D printing device is high in printing efficiency, accurate in printing, skilful in concept, and suitable for 3D printing of printing materials with high viscosity and poor liquidity.

The invention relates to a support structure applied to a miniaturized reflector. The support structure comprises a back-grooved reflector (1), a bonding block (2), a connection screw (3), a bulb (4), a taper clamping ring (5), a support leg (6) and a connection plate (7). A conventional similar support structure hides mechanical members in the caliber of an optical device so as to eliminate influences exerted by the support structure on the detection capability and precision of infrared radiation, however, during structural assembling, due to existence of work errors and bonding position errors, when the support leg (6) is in butt joint with the connection plate (7), an overdetermined phenomenon occurs, when the flexibility of the support leg is not sufficient enough to overcome additional stress brought by overdetermining, the optical surface of an optical element generates additional deformation, and thus the system imaging quality is affected. By use of bulb connection, the support leg (6) is enabled to have a degree of freedom in three rotation directions, and thus the influence exerted by the additional stress on the optical surface is solved. The support structure applied to the miniaturized reflector has the advantages of simple structure, stable work performance, mature processing technology and the like.

The invention discloses an aluminum steel window anti-collision treatment device and a using method thereof, and belongs to the technical field of aluminum steel window anti-collision. The aluminum steel window anti-collision treatment device comprises a pair of L-shaped protective frames clamped to the outer end of an aluminum steel window frame, wherein the L-shaped protective frames comprise U-shaped clamping plates clamped to the outer end of the aluminum steel window frame, the outer ends of the U-shaped clamping plates are fixedly connected with a pair of parallel inner-layer buffer cotton, and outer-layer buffer rubber is arranged at the ends, away from the U-shaped clamping plates, of the inner-layer buffer cotton. According to the aluminum steel window anti-collision treatment device and the using method thereof, the L-shaped protective frames are arranged on the outer side of the aluminum steel window frame, when an external object collides with the L-shaped protective frames, on the one hand, the collision force can be weakened for the first time from the front side through elastic deformation, on the other hand, the action direction of the collision force is changed through circulating rolling of balls, secondary weakening of the collision force is achieved, collision damage of the external object to the aluminum steel window frame is greatly reduced through doubleweakening of the L-shaped protective frames to the collision force, and double protection of the aluminum steel window frame is achieved.

The invention discloses a method for preparing a metal-organic framework material film, and belongs to the technical field of preparation of inorganic-organic hybrid films. The method comprises the following specific steps: enabling a ZrC14 solution to react with a 2-aminaterephthalic acid solution to prepare UiO-66-NH2; adding methacrylic anhydride to obtain modified UiO-66-NH2; adding modified UiO-66-NH2 in an acrylate organic monomer, adding a photoinitiator, and irradiating under UV light to obtain the metal-organic framework material film. The method is a simple and fast MOF film processing method, self-supported MOFs hybrid films of different polymer systems are synthetized, MOFs particles and the polymer systems are bonded, and the MOF particles are dispersed uniformly in the polymer systems. The method is simple, fast, and low in raw material cost, and has industrialized advantages.

The invention relates to the technical field of red brick embossing, and discloses an auxiliary device for red brick embossing used in construction, including a main body of the embossing device, a support plate is movably connected to the main body of the embossing device, and the right part of the support plate is fixed A connecting rod is installed, a first extruding plate and a first elastic air bag are arranged above the connecting rod, a second extruding part is arranged on the left part of the supporting plate, and a second elastic air bag is arranged under the second extruding part, so A workbench is arranged below the green press mold, and a cleaning plate is arranged above the workbench. In the initial state, the first elastic airbag shrinks, the second elastic airbag bulges, the first pressing plate moves down, and the first elastic airbag is not squeezed. At this time, the second elastic airbag is squeezed by the second extrusion part. When the moving rod moves to the right to drive the rotating gear to rotate counterclockwise, the counterclockwise rotation of the rotating gear will drive the clearing plate to move left through the tooth column, and the clearing plate moves to the left of the workbench in advance and removes the mud on the workbench.

The present invention proposes a semiconductor device and a manufacturing method thereof, including: providing a substrate, the substrate at least including a first active region, a second active region and a third active region, the first active region The width is equal to the width of the second active region; gate structures are respectively formed on the first well region and the second well region; a tensile stress film is formed on the first well region, and A compressive stress film layer is formed on the second well region, the tensile stress film layer covers the gate structure on the first well region, and the compressive stress film layer covers all gate structures on the second well region In the gate structure, the thickness of the tensile stress film layer is the same as the thickness of the compressive stress film layer. The manufacturing method of the semiconductor device proposed by the invention can improve the performance of the semiconductor device.

A forming method of a semiconductor device comprises the steps of providing a substrate, and enabling a first interlayer dielectric layer, a second interlayer dielectric layer and a groove penetrating through the thicknesses of the interlayer dielectric layers to be sequentially formed on the surface of the substrate; processing part of the first interlayer dielectric layer and the second interlayer dielectric layer on a side wall of the groove, respectively forming a first sacrificial layer and a second sacrificial layer, and enabling the width of the first sacrificial layer to be larger than that of the second sacrificial layer; after forming the first sacrificial layer and the second sacrificial layer, filling the groove to form a metal wire layer; after forming the metal wire layer, removing the first sacrificial layer and the second sacrificial layer to form an opening which comprises a first auxiliary opening at the bottom and a second auxiliary opening at the top, and enabling the opening diameter of the first auxiliary opening to be larger than that of the second auxiliary opening; and forming an insulating layer which is covered on the second interlayer dielectric layer and striding the opening. Correspondingly, the invention further provides the semiconductor device formed by adopting the method. Resistance capacitance (RC) effect is low, and performance of a semiconductor integrated circuit is good.

The invention relates to a method for preparing rare earth silicate ceramics by chemical vapor deposition of an oxygen-containing precursor. Rare earth oxides are used as reactants, and CH 3 SiCl 3 As a precursor, CO 2 As an oxygen source, hydrogen as a carrier gas and dilution gas, and argon as a protective gas, rare earth silicate ceramics are obtained through chemical vapor deposition. It can be used to prepare rare earth silicate ceramic powder, and can also be used to prepare rare earth silicate ceramic coating, and rare earth silicate ceramic modified structural ceramics and ceramic matrix composite materials. The preparation temperature of the rare earth silicate ceramics of the present invention is low, which solves the problem that the preparation temperature of the rare earth silicate ceramics is too high. Vapor deposition provides a new method for preparing rare earth silicate ceramics and rare earth silicate modified ceramic matrix composites.

The invention provides a device for supporting optical elements, comprising a horizontally arranged base (21) and an annular body (22) above the base (21), the lower end surface of the annular body (22) has a plurality of The supporting legs (221) whose axes are evenly distributed, the supporting legs (221) are fixedly connected with the base (21), and the part of the annular body (22) located directly above the supporting legs (221) is called a fixed section, and the annular body (22) The part between two adjacent fixed segments is called floating segment (222), the two ends of the floating segment (222) have arm bars (225) fixedly connected with the fixed segment, and the middle part of the floating segment (222) has The platform (226) is placed, and the floating section (222) is also provided with a U-shaped through hole for forming the tongue piece (223). Using the device provided by the invention to support the optical element can effectively reduce assembly and fixing stress, thereby preventing the surface shape of the optical element from being affected.

The invention discloses a waterproof cable connector, which comprises two electric joints, a cable connected at the rear ends of the electric joints, and an inner shell and an outer shell wrapped at the rear ends of the electric joints, wherein the front ends of the electric joints protrude forwards and extend out of the outer shell; the joints of the rear ends of the electric joints and the cable are wrapped in the inner shell, and the outer shell is wrapped and formed on the periphery of the inner shell again; the middle part of each electric joint is provided with an accommodating groove, and the front part of the accommodating groove is provided with a screwing part; and a nut and a waterproof shim are correspondingly sleeved on each electric joint, wherein the waterproof shim is correspondingly sleeved on the periphery of the accommodating groove of the electric joint, and the nut is correspondingly screwed on the screwing part of the electric joint and is used for pressing and fixing the waterproof shim to the front end face of the inner shell. Gaps between the electric joints and the inner shell are sealed to prevent external water from entering the inner shell through the periphery of the electric joints.