63results about How to "Ease of precision machining" patented technology

The invention provides a three-horizontal movement one-rotation parallel robot which comprises an output moving platform (1), a middle platform (2), a static platform (0), a ball pair parallelogram type branch chain I, a ball pair parallelogram type branch chain II, and two constraint-free S-S-R or S-S-P or S-P-S branch chains, wherein the ball pair parallelogram type branch chain I and the ball pair parallelogram type branch chain II are the same. The three-horizontal movement one-rotation parallel robot is characterized in that on the ball pair parallelogram type branch chain I or the ball pair parallelogram type branch chain II, one end of a drive rod (3) is connected with the static platform (0) through a first rotation pair (R11), the other end of the drive rod (3) is fixedly connected with a short edge rod at one end of a ball pair parallelogram composed of four ball pairs and four rods, and a short edge rod at the other end of the ball pair parallelogram is fixed to the middle platform (2); while on the branch chain I and the branch chain II, the axes of the two rotation pairs connected with the static platform (0) cannot be parallel to each other; the output moving platform (1) is connected with the static platform (0) through the two constraint-free S-S-R or S-S-P or S-P-S branch chains after being connected with the middle platform (2) through a second rotation pair (R0). The parallel robot has the advantages of being simple in structure, easy to manufacture, high in positioning accuracy and the like.

The invention relates to a radio-frequency push-pull power amplifier, belonging to the technical field of radio-frequency circuit. The radio-frequency push-pull power amplifier comprises the following four parts of a push-pull power transistor, an input matching network, an output matching network and a power supply bias circuit; the output matching network comprises an output balun impedance converter and an output matching circuit; the output balun impedance converter comprises a U-shaped coaxial cable and two identical straight coaxial cables that are overlapped in parallel and arranged on a printing circuit board horizontally, and two insulated leads; the two leads connect the internal conductor of the U-shaped coaxial cable with the internal conductor of the straight coaxial cable so as to form one conductor; the external conductors of two ends of the U-shaped coaxial cable are two low-resistance balance ports; the internal conductor of one end of the two straight coaxial cables is grounded and the other end thereof is a high-resistance unbalanced port; and the middle point of the external conductor of the U-shaped coaxial cable is connected with a direct current power and is grounded by a capacitance radio frequency. The radio-frequency push-pull power amplifier has symmetric structures, small space occupying, convenient processing and good repeatability, and greatly improves the electrical performance.

A two-segment enveloping worm end face meshing worm transmission device comprises a worm gear, a left segment worm, a right segment worm, a connecting shaft and axial positioning devices used for adjusting a worm and worm gear meshing side gap. The left segment worm and the right segment worm are taken from the end face of an enveloping worm and are identical in shape and structure. The left segment worm and the right segment worm are vertical to the center line of the connecting shaft relative to the worm gear and are axisymmetrically arranged on the connecting shaft, and a gap is reserved between the left segment worm and the right segment worm for installation of the worm gear. The worm gear is located between the left segment worm and the right segment worm and is arranged on a worm gear shaft, and different portions of the tooth faces on the two sides of the worm gear are meshed with the tooth faces of the left segment worm and the tooth faces of the right segment worm respectively. The axial positioning devices are two in number, and are respectively combined with the left segment worm and the right segment worm and installed on the connecting shaft. On the conditions that the number of meshed teeth of the worms and the worm gear is large and bearing capacity is large, the worm transmission device of the structure effectively solves the difficulty that rigidity of the throat portion of a common enveloping worm is not enough, and solves the problem that a backlash is automatically eliminated after the tooth faces are abraded.

The invention discloses a micro-nano composite diamond coating, a preparation method and application thereof, a cold extrusion die punch and the die, and relates to the technical field of diamond coating preparation. The micro-nano composite diamond coating sequentially comprises (a) a micron diamond coating in contact with a substrate and (b) a nano diamond coating. The preparation method of themicro-nano composite diamond coating includes the step that a hot-wire vapor deposition method is used for sequentially depositing the micron diamond coating and the nano diamond coating on the surface of the substrate. The invention also provides the application of the micro-nano composite diamond coating to the cold extrusion die, the cold extrusion die punch and the die. The micro-nano composite diamond coating is applied to the cold extrusion die punch, the service life of the extrusion die punch is prolonged, the cost is reduced, the friction between the punch and a workpiece is reduced,the forming extrusion force is reduced, and the surface smoothness of the workpiece is improved.

The invention discloses a silicon carbide-nano-diamond composite coating, a preparation method thereof and application thereof, a cold-extrusion mould terrace die and a mould, and relates to the technical field of diamond coating preparation. The silicon carbide-nano-diamond composite coating sequentially comprises a silicon carbide coating and a nano-diamond coating, which are in contact with a base body. The preparation method for the silicon carbide-nano-diamond composite coating comprises the following step of adopting a hot filament chemical vapor deposition method to sequentially depositthe silicon carbide coating and the nano-diamond coating on the surface of the base body. The invention further provides application of the composite coating in a cold-extrusion mould as well as theco-extrusion mould terrace die and the mould. A silicon carbide intermediate layer can effectively improve binding force between the coating and the base body, and blocks cobalt in the block body fromdiffusing into the diamond layer to catalyze graphite to reduce wear resistance of the diamond coating, and a nano-dimension diamond film is beneficial for reducing surface roughness of the coating.The silicon carbide-nano-diamond composite coating is applied to the cold-extrusion mould terrace die, so that the service life of the terrace die is prolonged, friction force between the terrace dieand a workpiece is reduced, and product quality is improved.

The present invention relates to a novel electromagnetic valve with a pilot valve structure, which belongs to a system control element in a refrigeration-circulating system. The prior art has the defect that the structural problem causes the injury of the surface quality of a small valve seat, which reduces the qualified rate of products. The electromagnetic valve comprises a main valve, a pilot valve and an electromagnetic coil; wherein, the pilot valve is provided with a bushing; a small valve seat is welded in the cavity of the bushing; the end of the bushing, which is close to the electromagnetic coil, is hermetically welded with an end enclosure, and the other end of the bushing is blocked by an end cover. Since the end of the bushing, which is close to the small valve seat, is blocked by the end cover, both ends of the bushing are open, particularly, the end of the bushing, which is close to the small valve seat, is open, thereby, after being welded, the small valve seat can be precisely processed in order to avoid the injury of the surface quality of the small valve seat caused by welding, ensure the precision degree of the surface of the small valve seat and increase the qualified rate of products. Meanwhile, since the structure is simple, the qualified rate of mass production can be ensured.

The invention belongs to the technical field of enhanced heat transfer and discloses a preparation method which is used for a porous boiling surface and capable of controlling a vaporization core. The preparation method comprises the steps that a template of the vaporization core is designed; a top layer with metal micro-nano particles is pressed and covered; and a co-sintering-demolding process is conducted to obtain the porous boiling heat-transfer surface with the fixed vaporization core. According to the preparation method, the problem that the vaporization core of the boiling surface is distributed in an uncontrollable mode is solved, and the phenomenon that boiling bubbles are too intensive and converge on the porous heat-transfer surface is effectively controlled. Technical improvement in the field of heat exchanger is facilitated. The preparation method is started from a porous heat-transfer mechanism, and distribution of the vaporization core is controlled technically. The boiling heat-transfer process is intensified from a principle of bubble dynamics, and another novel development direction and processing technology are provided for the porous heat-transfer surface on the rise, so that a basis is better provided for studying boiling bubble dynamics academically. The preparation method has profound academic value and significant social benefits.

The invention discloses a stainless steel material and manufacturing methods thereof. The stainless steel material is Cr-Mn-N austenitic stainless steel with nickel replaced with nitrogen. The manufacturing methods comprise a smelting method, a blank punching method and a machining method. The smelting method mainly comprises the step of smelting high-nitrogen steel through two alloying nitrogen-increasing methods, namely using nitrogen-containing materials and gaseous nitrogen. The blank punching method mainly comprises the steps of conducting circulative blank punching, conducting heat treatment, conducting solid solution treatment, and controlling the heat retention temperature and heat retention time, wherein hardness values and impact toughness values serve as the main reference for die selection. The machining method mainly comprises the steps of controlling appropriate machining parameters of milling and turning. The stainless steel material and the manufacturing methods thereof have the advantages that the stainless steel material is the novel austenitic stainless steel; the smelting method is applicable to batch smelting of the high-nitrogen steel with the nitrogen content ranging from 0.4 wt% to 0.75 wt%; the blank punching method inhibits cold hardening phenomena in the high-nitrogen steel machining process, and blank punching is facilitated; through the machining method, the problem that machining difficulty is large due to high hardness of the high-nitrogen steel is solved.

The invention provides a mounting bracket for T / R assembly of hemispherical phased array radar, which aims at providing a mounting bracket which has high reliability and high integration and can be easily mounted and maintained. The invention is realized by the following technical schemes. The upper end is provided with a support turn cover (3) and a support body (2) whose free end is provided with an adapter plate (4).The support turn cover and the support body are fixedly connected to a back arc shape support plate (1) with a two-layer staggering structure. The adapter plate is fixedly connected to the front end of the support body with an independently moveable installation unit. An attached bracket (5) is inserted fixedly into the arc shape support plate (1) through the docking face between the two layers of the staggering support box and from the front side face at two ends from the head to the tail of the lower layer of the support box respectively; a power distributor (7) and two power dividers (6) at two sides of the power distributor (7) serve as attached components that are fixedly arranged on the front plate of the support to assemble a component array (10). Finally, all component arrays are fixed to the inner side of the spherical hemisphere phased array radar.

The invention relates to the production field of the graphite material, in particular to a soaking method for a high-purity graphite multi-immersed product, which can completely soak a roasted carbon product. The roasted carbon product is put into a shot blasting machine to remove a surface shell; then the processed carbon product is preheated in a preheating furnace; the preheated carbon productis taken out to put into an impregnating tank and the impregnating tank is vacuumized; then, coal tar pitch is added into the impregnating tank; under the condition of certain pressure, the carbon product is kept for certain time; then, the carbon product is hoisted out and is cooled in a cooling pool at certain temperature for certain time; then the carbon product is hoisted out to remove surface pitch, and is roasted; according to the requirement, the processes of removing the shell, impregnating and roasting are carried out for 1-3 times; the carbon product can be soaked without adding anydiluent; and therefore, each performance index of the high-purity graphite product can be drastically improved.

The invention relates to a method for forming a flange by vibrating and winding and a forming machine thereof. The forming method comprises the following steps: 1, positioning steel plates to be processed on the forming machine, and moving a sliding rolling die downward to a press initial position A on the upper lateral surface of the steel plate; 2, pressing the steel plate downward for delta h stroke by the sliding rolling die to a press stop position B; 3, feeding the steel plate according to certain speed, making the upper and lower vibration with certain frequency at the position B, and vibrating the steel plate by the sliding rolling die to ensure that the steel plate is bent to the set radian; and 4, trimming a connector of the flange by a head trimming device to finish the forming and winding of the flange. The forming machine comprises a fixing rolling die, the sliding rolling die, a hydraulic oil cylinder, a main hydraulic pump, a vibration pump, a sliding block, a sliding rail and an auxiliary material pushing mechanism; the sliding block is glidingly connected to the sliding rail; the sliding rolling die is connected to the sliding block; the vibration pump is connected with the hydraulic oil cylinder; and the auxiliary material pushing mechanism is connected to the stander and pushes the steel plate to feed when the sliding block and the sliding rolling die make the vibrations. The forming machine has the advantages of low energy consumption, good winding effect and stability, less material consumption and low cost.

The invention provides a fuel metering valve which comprises a ratio electromagnet. The ratio electromagnet comprises an outer shell. A lead piece and a plug are arranged on the outer side of the outer shell. An inner shell is arranged in the outer shell. A coil is arranged in the middle of the inner side of the inner shell. An inner hole is formed in the tail end of the inner side of the inner shell. An insert bush is arranged in the inner hole. A first sliding bearing is arranged on the inner side of the insert sleeve. An armature motion component is arranged on the inner side of the coil. The tail end of the armature motion component is inserted into the first sliding bearing and is in sliding connection with the first sliding bearing. A mechanical sliding valve is connected to the front end of the inner shell. A second sliding bearing is arranged in a valve bush of the mechanical sliding valve. The front end of the armature motion component is inserted into the second sliding bearing and is in sliding connection with the second sliding bearing. According to the fuel metering valve, deep hole precision machining is facilitated, friction resistance of the armature motion component can be reduced easily, action of the armature motion component is reliable and stable, the product motion performance is improved, and the service life is prolonged.

The present invention relates to an electronically controlled fuel injection valve, and unlike a conventional mechanical fuel injection valve, the electronically controlled fuel injection valve provided by the present invention controls the injection time and the injection amount according to a control signal, independent of driving conditions of an engine, enables swift control of the fuel injection by using as a method for controlling the fuel injection a method that increases the strength of lifting up a cut-off needle of an injection control unit by delivering through a control needle high pressure fuel to a lower pressure chamber, and when the fuel injection is not carried out, fuel is not supplied to a nozzle unit, thereby preventing the high pressure from being applied to the nozzle unit at normal times, and prevents a large amount of fuel from being leaked into a combustion chamber when a component such as the needle is damaged, and processing thereof is easy due to the simple structure of a second fluid channel.

The invention relates to an automobile part precise machining system. The automobile part precise machining system comprises an outer machining supporting device and an inner machining supporting device. The inner machining supporting device is mounted on the upper side of the interior of the outer machining supporting device. A damping spring device is mounted on the lower side of the interior of the outer machining supporting device. An adjusting device is mounted in the center of the bottom of the outer machining supporting device and connected to the bottom of the damping spring device. The adjusting device is mounted at the top of the damping spring device and in the inner machining supporting device. A machining supporting rod is mounted at the top of the adjusting device. A machining conducting device is mounted at the top of the machining supporting rod. The system has the advantages of being high in efficiency and low in surface roughness and is convenient to use.

The invention discloses a crosslinkable cycloolefin copolymer as well as a preparation method and application thereof. Repeated structural units of the crosslinkable cycloolefin copolymer comprise a structural unit A and a structural unit B, and the B structural unit can be further crosslinked. The structural unit A is obtained from norbornene and a derivative monomer a thereof, the structural unit B is obtained from a monomer b containing two or more double bonds, the structure of the monomer b comprises at least one or more six-atomic rings, at least one double bond is on the six-atomic ring, and at least one double bond is adjacent to the ring body. The crosslinkable cycloolefin copolymer is a COC material with a controllable Tg point, is easy to process, and can be subjected to an in-situ crosslinking reaction in the subsequent processing process, so that a high-temperature-resistant COC material is obtained through molding, a thermoplastic material is changed into a thermosetting material, and the thermosetting cycloolefin copolymer can be applied to different fields and has wide application prospects. The materials comprise packaging materials, circuit substrates and the like.

The invention relates to an annealing drawn steel rod for finish machining; the steel rod selects raw materials of hypoeutectoid low-alloy steel; the steel rod adopts uniform (granular) bainite, and possibly contains fewer ferrites; carbide particles are uniformly distributed in a basal body; strip sulfide inclusions are distributed in the structure; and the hardness of steel is 160-250 HB. The steel rod with the bainite structure is generated after rolling of a blank; the annealed rod with controllable hardness is obtained through softening and annealing; the product with target hardness is drawn; the product shows excellent precise machining performances; and when a precise cutter is adopted to machine such shapes with higher chip removing requirements as small-diameter deep holes and annular blind holes, the life of the cutter is equivalent to that when isothermal annealed rods with the same hardness are machined, and is twice of that in a conventional annealing process.

Provides a precision machining molding module for micro power transmission components. A cavity is formed in the middle of the lower end surface of the upper half mold, and gates are formed on both sides of the upper end surface of the upper half mold, and the gate communicates with the lower end of the cavity through the runner. The middle part of the upper end surface of the lower half mold is equipped with a brush welding leg positioning groove corresponding to the position of the cavity, the lower half mold is equipped with a lower positioning device, and the middle part of the upper end surface of the upper half mold is equipped with The upper positioning device for positioning the upper end of the brush wire, the upper half mold and the lower half mold are positioned and assembled to form a tapered mold with a large upper part and a smaller lower part, and the upper and lower half molds pass through the clamping ring The device locks securely. The invention facilitates the assembly operation of the miniature power transmission components and the removal of plastic parts. The upper half mold and the lower half mold are precisely assembled with the micro power transmission components, and the positioning part adopts a completely open structure, which is convenient for processing, polishing and surface treatment, and improves the plasticity. Compression-molded Micro Power Transmission Components for quality and precision.

A hot-wire cutter includes a frame, a tank supported on the frame, a first working head located on a floor of the tank, a second working head movably supported on the frame, a supporting unit supported on the frame and used to support an annular work piece, a restraining unit supported on the frame and used to clamp the annular work piece, and a rotating unit supported on the frame and used to rotate the annular work piece. Thus, a line between the first and second working heads is directed through the centers of initial apertures in the annular work piece, one after another, to facilitate precise processing of sections of the annular work piece corresponding to the initial apertures.