19results about How to "Solve processing difficulties" patented technology

The invention provides a binary polyethylene composition for a lithium battery diaphragm as well as a preparation method and application of the binary polyethylene composition. The preparation method comprises the following steps: S1, carrying out first polymerization reaction on ethylene to obtain low molecular weight polyethylene with intrinsic viscosity of 2-5dl / g; the temperature of the first polymerization reaction is 60-80 DEG C, the pressure is 0.4-0.8 mPa, and the mass ratio of ethylene to hydrogen is (6000-4000): 1; s2, ethylene is subjected to a second polymerization reaction, and extra-high molecular weight polyethylene with the intrinsic viscosity of 6-12 dl / g is obtained; the temperature of the second polymerization reaction is 75-90 DEG C, the pressure is 0.5-1 mPa, and the mass ratio of ethylene to hydrogen is 4000-2000: 1; the binary polyethylene composition for the lithium battery diaphragm comprises low-molecular-weight polyethylene and extra-high-molecular-weight polyethylene. The invention effectively solves the problem of difficult processing of extra-high molecular weight polyethylene.

The utility model discloses a machining tool for cylinder body dragon milling, which comprises a dragon milling table, a large-diameter cutter body, an adjusting mechanism and a mounting mechanism, the top end of the dragon milling table is symmetrically and fixedly connected with slide rails, the two slide rails are connected with a portal frame in a sliding manner, the portal frame is provided with movable machining equipment, the bottom end of the machining equipment is provided with the large-diameter cutter body, and the large-diameter cutter body is provided with the adjusting mechanism. A large-diameter cutter body is arranged in the machining equipment, blades are symmetrically installed at the bottom end of the large-diameter cutter body, an adjusting mechanism is installed in the machining equipment, the adjusting mechanism and the large-diameter cutter body are installed in a matched mode, and an installation structure is arranged between the blades and the adjusting mechanism. The novel cylinder body part machining difficulty is solved, the production preparation time of dragon milling operators in the production process can be shortened, and on the premise that economic benefits are considered, the adjusting efficiency is improved, and safe production is achieved.

The present invention provides a polylactic acid fiber spinneret with a double concave-convex special-shaped cross section, and relates to the technical field of polylactic acid fiber spinning. The polylactic acid fiber spinneret with a double concave-convex special-shaped cross section comprises an upper plate, a lower plate, a seat ring, a liquid guide cavity, a liquid guide groove, and a liquid guide hole. The present invention provides multiple groups of inserts with spinnerets, so that multiple groups of spinnerets are used in combination, which effectively solves the problem of processing difficulties after increasing the length of the spinnerets, and the detachable connection simplifies the work of cleaning the spinnerets. A sink is provided on the lower wall of the lower plate, and the weight of the spinneret is greatly reduced by hollowing out. Multiple groups of spinnerets are arranged in increasing order from top to bottom, and a nano alloy ion layer is provided on the inner wall of the spinneret to increase the smoothness, which can release part of the elastic potential energy of the polylactic acid melt to a certain extent, reduce the expansion ratio of the primary silk, and maintain the stability of spinning. The nano alloy ion layer also plays an anti-corrosion role.

The present invention discloses a laboratory sample rack, comprising a base, a support frame and a sample tube fixing plate, wherein the upper surface of the base has a buffer layer, the lower end of the support frame is connected to the base, the sample tube fixing plate has a sample tube placement hole, the sample tube fixing plate is arranged above the base, the sample tube placement hole is within the upward projection range of the buffer layer, and the support frame is used to support and fix the sample tube fixing plate. The laboratory sample rack provided by the present invention can reduce the collision between the sample tube and the sample rack, and avoid the sample tube from bouncing up when placing the sample tube, causing the sample to spill and cause contamination.

The utility model discloses an assembly type crankshaft, including driving crank, driven crank and two balance blocks. The center of two balance blocks all is provided with the installation through -hole, and driving crank, driven crank are inserted in corresponding installation through -hole respectively. Two balance blocks are spaced apart, and are provided with connecting rod needle bearing between. Connecting rod needle bearing is divided into the installation part of middle and the insertion part of both ends. The insertion hole is set up on two balance blocks. The insertion hole eccentricity sets up on the balance block. Two insertion parts on connecting rod needle bearing are inserted in corresponding insertion hole. The utility model discloses through dividing crankshaft into driving crank, driven crank, connecting rod needle bearing and two balance blocks, and through the insertion type assembly between, make crankshaft be combined by multiple independent sections, and effectively solve the problem that integral type crankshaft processes difficultly.

This invention relates to the field of modified plastics technology, specifically to a polypropylene composite material, its preparation method, and its application. The invention provides a polypropylene composite material comprising the following components in parts by weight: 4-26 parts polypropylene, 6-13 parts polyethylene, 30-50 parts spherical metal filler, 30-50 parts flake carbon filler, 0.4-1.2 parts antioxidant for polypropylene, 0.4-1.2 parts antioxidant for polyethylene, 0.2-0.6 parts metal passivator, and 0.3-1 part epoxy resin; the melt flow rate of the polypropylene is 10-100 g / 10 min (230℃, 2.16 kg), and the melt flow rate of the polyethylene is 1-3 g / 10 min (190℃, 2.16 kg); the surface of the spherical metal filler is coated with the polyethylene. This composite material solves the problem of difficult processing of high-filler systems and also possesses excellent thermo-oxidative aging properties.

The application belongs to the technical field of polymer composites, and discloses a reversible cross-linking high-thermal-conductivity high-strength flame-retardant PC composite material and a preparation method thereof.The composite material contains, by weight, 100 parts of polycarbonate (PC) resin, 5-25 parts of borate-modified boron nitride (BN), 0.1-1 part of an antioxidant, and 0.1-1 part of an anti-dripping agent, wherein the borate-modified BN is obtained by organic modification of the surface of BN with a borate cross-linking agent.The above raw materials are melt-blended and extruded, and a reversible borate cross-linking network structure is formed through an ester exchange reaction between an o-diol and phenylboronic acid.The thermal conductivity of the composite material is greater than or equal to 1.2 W / (m·K), the vertical burning level is UL94 V-0 (3.2 mm), the tensile strength is greater than or equal to 55 MPa, the bending strength is greater than or equal to 85 MPa, the melt flow rate is greater than or equal to 10 g / 10 min, and the dynamic cross-linking bond is reversible under heating conditions, the material can be recycled and reprocessed, and the green and cyclic manufacturing concept is met, so the composite material is suitable for heat dissipation components in the fields of LED lighting, power adapters, new energy vehicles, 5G communication, etc.

The application discloses a kind of laser processing devices of mould surface texture, including base, laser cutting machine main body, material guiding structure, blanking structure and solid material structure;The laser cutting machine main body is fixedly arranged on the right end upper wall of base, the material guiding structure is fixedly arranged in the middle of base front end, the blanking structure is fixedly arranged on the left end of material guiding structure, the solid material structure is fixedly arranged on the right end front side of base, and solid material structure respectively with laser cutting machine main body and material guiding structure right end correspond, the present application relates to mould processing equipment technical field, the present application has the beneficial effect that: automatic blanking and guiding, improve processing efficiency, reduce manual operation, multi-angle overturn processing, optimize inner wall texture precision, solve the problem that traditional device inner wall is processed difficult, self-adapting adjustment design, enhance mould compatibility, fit different thickness and diameter mould blanking demand, improve equipment versatility.

The utility model relates to the technical field of machine manufacturing, in particular to a special position machining tool for small shaft type round bar parts, which comprises a machining platform, a clamping jaw vice and a positioning clamping block. The clamping vice comprises sizing blocks and a sliding seat, a plurality of pairs of sizing blocks are installed on the sliding seat in the length direction, and a set of positioning clamping blocks is installed between each pair of sizing blocks to clamp a small shaft type round bar part; the sliding base slides on the machining platform to adjust the position. A pair of positioning clamping blocks is arranged, profiling grooves are formed in the opposite faces of the inner sides of the positioning clamping blocks in the length direction, the positioning clamping blocks are used for clamping small shaft type round bar parts, and the pair of positioning clamping blocks are fixed to the sizing blocks on the two sides through locking bolts respectively and locked on the sliding base through locking screws. During clamping, the contact area of the circular side wall is large, local point position stress is reduced, indentations and scratches are prevented from being generated on the surface of a part, meanwhile, the positioning and guiding effects are achieved, the coaxiality and the clamping degree are ensured, scratches and other damage to the shaft end, namely the outer circular surface are avoided, the machining precision is improved, and positioning is accurate.

The invention discloses a control system for a CNC electric spark perforating machine tool for processing fuel injection holes of automobile fuel injectors, comprising an upper computer, the upper computer is respectively connected to a lower computer, a fine pulse power supply for micro-hole processing, a high-sensitivity servo feeding system for micro-hole processing and a touch display screen, the lower computer is respectively connected to a pneumatic fixture control circuit of an automobile fuel injector and an interface circuit of a loading and unloading manipulator of an automobile fuel injector, the pneumatic fixture control circuit of an automobile fuel injector is connected to a pneumatic fixture of an automobile fuel injector, the lower computer is respectively connected to an X-axis servo driver and a Y-axis servo driver, the X-axis servo driver and the Y-axis servo driver are respectively connected to an X-axis motor and a Y-axis motor, the fine pulse power supply for micro-hole processing is connected to a perforating discharge system, the perforating discharge system is connected to a high-sensitivity servo feeding system for micro-hole processing, and the high-sensitivity servo feeding system for micro-hole processing is connected to a perforating spindle system. The invention can quickly, stably and reliably complete the micro-hole processing of automobile fuel injectors, and greatly improve the yield rate.

The invention belongs to the field of optical communication transmission, and particularly discloses a high-tensile-strength framework type ribbon optical cable and a preparation method thereof.The high-tensile-strength framework type ribbon optical cable comprises a framework type cable core and a sheath body, the sheath body wraps and is attached to the outer portion of the framework type cable core, and the framework type cable core comprises a framework body and a plurality of optical fiber ribbons; a plurality of skeleton grooves are formed in the peripheral side of the skeleton main body; the plurality of optical fiber ribbons are respectively arranged in the corresponding skeleton grooves; the skeleton-type cable core also comprises a water-blocking tape, and the water-blocking tape wraps the optical fiber tape and the skeleton main body. The sheath body comprises an inner sheath layer, a tension enhancement layer and an outer sheath layer which are sequentially arranged from inside to outside. According to the skeleton-type ribbon optical cable, the sheath body is combined with the skeleton-type cable core, so that the whole optical cable has better tensile performance on the premise that the advantages of high optical fiber density, small diameter and weight, no pollution and the like of the existing skeleton-type ribbon optical cable are reserved, and the skeleton-type ribbon optical cable is suitable for use and construction occasions with higher requirements on the tensile force of the optical cable.

The utility model relates to the application field of guided missile integrated navigation. More specifically, the utility model relates to an anti-interference connection structure, an integrated navigation device and a missile, the anti-interference connection structure comprises a shielding box; a female head of the three-coaxial radio frequency connector penetrates through the shielding box and is in sealed connection with the shielding box; and one end of the three-coaxial cable is connected with the three-coaxial radio frequency connector male head. According to the anti-interference connecting structure, the combined navigation device and the guided missile, the combined navigation device comprising the anti-interference connecting structure is applied to the guided missile, so that a satellite navigation antenna of the combined navigation device is not interfered by internal parts of the guided missile.

The invention discloses an intermediate shaft processing power transmission device, which comprises a machine tool chuck, a base, a transmission rod and an intermediate shaft main body, the base is provided with a first mounting hole, a second mounting hole and a mounting screw hole, the machine tool chuck is fixedly connected with the base through a locking bolt, the transmission rod comprises a transmission shaft body and a connecting stud, and the transmission shaft body is fixedly connected with the base through the connecting stud. The connecting stud of the transmission rod is in threaded connection with the mounting screw hole of the base, the base is fixedly connected with the transmission rod in a threaded mode, the intermediate shaft body comprises a flange end, and a hole body is formed in the center of the flange end. According to the technical scheme, the novel tool is designed and manufactured, the transmission effect is ideal, compared with an original tool, the influence of idling of an intermediate shaft in the initial movement process is reduced, power transmission is timely, the shaft and a lathe spindle do not have relative movement, the problem that machining is difficult due to uneven transmission force in the shaft machining process is solved, the machining precision of products is guaranteed, and the machining efficiency is improved. Therefore, the product quality and the attractiveness are improved.

A glass-metal laser composite welding method, the present invention relates to the field of laser welding, and specifically to a glass-metal connection process based on ultrafast laser technology. The present invention is to solve the technical problem of poor reliability of existing glass-metal connections. Method: 1. Fix the light emitter of the continuous laser and the light emitter of the ultrafast laser; 2. Adjust the focus of the continuous laser and the focus of the ultrafast laser to be located on the contact surface of the base material; 3. Turn on the continuous laser and the ultrafast laser to weld the base material. The present invention utilizes the thermal effect and impact effect of the continuous laser, the high processing accuracy and nonlinear absorption phenomenon of the ultrafast laser, to overcome the problems such as the difficulty in processing the base material contact surface in the ultrafast laser welding process, and is of great significance to the development of laser welding and the nuclear industry. The present invention is used for welding glass-metal dissimilar materials.

The invention relates to a processing technology for preparing a steel strip for high manganese austenite low temperature steel flux-cored welding wire. The technical scheme comprises the following steps: polishing and grinding a high manganese austenite low temperature steel hot rolled strip, cold rolling, welding and coiling the strip; then performing four annealing heat treatments and cold rolling, and finally performing one annealing heat treatment: the temperatures (°C) of the five annealing heat treatments are 950-1080, 980-1100, 970-1060, 950-1040, 980-1020, the heat preservation time is 0.5-1.0 hour, and the protective atmosphere is hydrogen; the cooling rates (°C / min) are 100-120, 120-140, 140-160, 240-260, 280-300, the thicknesses (mm) of the four cold rollings are 1.5-2.3, 0.8-1.5, 0.6-0.8, 0.4-0.6, and trimming is performed to obtain a steel strip for preparing a high manganese austenite low temperature steel flux cored welding wire. The invention has simple ingredients, low powder filling rate and high production efficiency. The manufactured product is suitable for all high manganese austenite low temperature steel flux cored welding wires and meets the technical requirements for preparing high manganese austenite low temperature steel matching flux cored welding wires.

The utility model relates to processing equipment technical field, concretely relates to a kind of screw machine barrel section horizontal car clamping tool, including spiral machine barrel section, the inside of spiral machine barrel section is provided with flange plate, the middle position of flange plate is equipped with center hole, the center hole includes the first top hole and the second top hole sequentially arranged from left to right, the first top hole and the second top hole are coaxial and mutually communicated;The flange plate is equipped with several mounting holes with center hole as center circular array;Top tight piece is equipped on the inner wall of mounting hole close to spiral machine barrel section, one end of top tight piece penetrates flange plate, and top to the inner wall of spiral machine barrel section;The inner wall of spiral machine barrel section is annularly arranged with multiple auxiliary web, auxiliary web is located at the inboard of flange plate, for limiting the position of flange plate.The utility model can assist horizontal car to quickly clamp barrel section, with stronger universality, can be applicable to different diameter, length barrel section processing, reduce manufacturing cost.

The invention discloses a scheme for enabling a lathe to realize bevel grinding of a gear rotor. The scheme comprises the following steps: firstly, mounting a first ejector pin in a center hole of a lathe chuck, mounting a second ejector pin on a lathe tailstock, mounting a motor on a lathe saddle, and fixing a turning tool on a transmission shaft part; a traveling crane is used for hoisting the gear rotor to a lathe, a first ejector pin and a second ejector pin abut against the two ends of the transmission shaft part correspondingly, and a to-be-ground inclined face on the gear part faces a grinding wheel on a motor; the angle of the motor on the lathe is adjusted through the tool rest; the lathe is started, and the lathe chuck drives the gear rotor to rotate through the turning tool; starting the motor to drive the grinding wheel to rotate; and driving the motor to axially move along the transmission shaft through the lathe saddle, so that the grinding wheel moves towards the gear part of the gear rotor until the inclined surface of the gear part is machined. By means of the arrangement, on the premise that equipment does not need to be additionally arranged, the large gear with the diameter larger than two meters can be rapidly produced, the production cost is effectively reduced, and the production efficiency is improved.

The utility model discloses a taper pin hole reaming device for a rotor impeller of a steam turbine, and belongs to the field of machining and assembling. A turbine rotor impeller taper pin hole reaming device comprises a transmission box fixed on a tripod, a large gear set connected with a reamer and a small gear set meshed with the large gear set are arranged in the transmission box, and the small gear set is connected with an electric hand drill through an electric hand drill connecting shaft. A cover plate is arranged on the right side of the transmission case, a stud perpendicular to the cover plate is arranged in the center of the cover plate, and the puller nut is in threaded connection with the stud. The taper pin hole reaming device solves the problem that a taper pin hole in a rotor impeller of a steam turbine is difficult to machine, through the large bevel gear and the small bevel gear which are meshed, the force application direction is changed, original manual operation is changed into electric hand drill force application, the taper pin hole in the impeller can be rapidly reamed, reaming quality is guaranteed, manpower can be saved, and machining efficiency is improved.

The invention discloses a method for machining an oblique cone cylinder. Comprising the steps that S11, based on an obtained positive cone cylinder, a first reference block is fixed to the outer surface of a second machining part of the positive cone cylinder; s12, the second machining part is fixed, a milling cutter is moved to make contact with the first reference block to determine a first machining reference point coordinate, and then the first machining part of the positive cone cylinder is milled till the first machining part is milled into a first forming part; s13, the positions of the first forming part and the second machining part are rotationally exchanged, and then the first forming part is fixed; and S14, the milling cutter is moved to make contact with the first reference block to determine coordinates of a second machining reference point, then the milling cutter is moved to mill the second machining part till the second machining part is milled into a second forming part, and the oblique cone cylinder is obtained. In this way, the problems existing in the machining process of an existing high-temperature alloy oblique cone cylinder are solved.