434 results about "Thin wall" patented technology

The invention belongs to the technical field of solid-liquid phase change heat dissipation, and discloses a memory alloy-based phase change expansion buffer structure, which comprises an elastic structure, a supporting structure, a thin wall, a cavity, a flaring, an electronic device, a heat sink, fins, a connecting structure and a phase change material, the thin wall is made of shape memory alloy and separates the internal cavity and the external phase-change material, the internal cavity is communicated with the external environment through the flaring, and in the flying process of the aerospace vehicle, external airflow flows into the flaring to take away heat stored by the phase-change material continuously. Based on the shape memory function of the memory alloy, additional space expansion buffering can be provided for the phase change material when the temperature changes, and stress damage caused by phase change expansion is avoided. The memory alloy thin wall and the elastic supporting structure are combined, the structure is simple, no moving part exists, circulating work in the high-temperature environment and the low-temperature environment can be achieved, local hot spots caused by internal gap movement of the phase change material in the circulating phase change process are reduced, and heat transfer deterioration is avoided.

A putter-type golf club head comprises a unitary construction metallic frame having a thin wall crown region, and a crown damping member attached to thin wall crown region. The unitary construction metallic frame has a frame mass of 250-370 grams, a frame density of at least 2.5 g / cc, a frame length of 40-130 mm, a frame width of 75-130 mm, a frame height of 17-30 mm, a frame front forming a portion of a striking face, a frame rear, a frame top, and a frame bottom, wherein the frame top includes a thin wall crown region having a TWCR thickness of 0.6-1.2 mm, a TWCR length, a TWCR width, and a TWCR area of at least 600 mm2.

The invention provides a topology and morphology integrated optimization design method for a thin-walled structure. The method comprises the steps that 1, a finite element model is established according to design requirements; 2, extracting a thin-wall structure morphology distribution field # imgabs0 # through two-step partial differential equation filtering and Heavide projection operation; 3, constructing a material attribute rational approximation model in combination with the thin-wall morphology distribution field # imgabs1 # and the topological density field v obtained in the step 2, thereby obtaining an elastic modulus E and mass rho in a design domain; 4, performing finite element analysis in combination with the material interpolation model, and calculating the flexibility of the structure; 5, solving to obtain the sensitivity of the structure flexibility and the quality relative to the design variables; step 6, updating the morphology design variable mu and the topology design variable v of the thin plate by adopting a moving asymptote method; and step 7, when a convergence condition is satisfied, stopping optimization iteration and outputting an optimization result. According to the method, the maximum forming angle of the thin-wall structure is controlled by adjusting the filtering radius of the anisotropic filter, and the stamping forming process is met.

A moving part of the short flexible cylinder active complex parallel radial harmonic transmission is composed of a thin-wall composite short flexible cylinder and two rolling wave generators with roller pins or ball-retainer assemblies. A flexible bearing low-speed moving ring raceway is integrated on one side of the gear, and a full-cylinder-length gear is arranged on the other side of the gear; the two semi-short shafts are fixedly connected to the two ends of a motor rotor respectively, are integrated with flexible bearing high-speed moving ring raceways and are the same in structure size, and a semi-short shaft at one end needs to be coplanar with a semi-long shaft at the other end, so that the two ends of the semi-short shafts generate time-varying radial antisymmetric deformation; the static part is composed of end covers which are fixedly connected to the two ends of the motor stator and provided with rigid gears. A double-convex-arc raceway of a high-speed moving ring of the flexible needle bearing is designed, a convexity needle roller with the middle concave structure dynamically constraining the axial movement amount of a short flexible cylinder and a retainer and various structures facilitating rolling body assembly are used, and a waveform raceway calculation formula of a wave generator for the needle roller is given; therefore, the radial size and the axial size of the active complex radial harmonic transmission can be reduced on the basis of ensuring the transmission precision and the bearing capacity.

The invention provides a cavity thin-wall part printing method and system, a storage medium and equipment, and the method comprises the step of adopting a cavity part regional printing processing method with different forming parameters. A thin-wall cavity part of a part is independently split into an integral part through three-dimensional modeling software, a main body structure part and a thin-wall cavity structure part are split into a plurality of parts, and different filling printing parameters are adopted for machining the parts of different structure parts. By means of the printing method, heat accumulation can be effectively shared, distribution of residual stress is reduced, finally, the size structure precision of the thin-wall part is effectively guaranteed, and the printing success rate of the complex cavity part is increased.

The invention discloses a clamping and supporting tool for thin-wall parts, and relates to the field of clamping and supporting tools, the clamping and supporting tool comprises a box body part, a square inner groove is formed in the middle of one end of the box body part, a first clamping tool is arranged in the square inner groove, and the first clamping tool is of a frame type structure and is matched with the square inner groove in the box body part; a plurality of first inner grooves which are symmetrically distributed are formed in the peripheral wall of the first clamping tool, the first inner grooves are blind grooves, and clamping springs are fixedly installed at the bottoms of the first inner grooves; by means of the combined structure of a frame type / rod-shaped clamp, an elastic support and a process plate, traditional rigid clamping is replaced, clamping force can be evenly dispersed, plastic deformation during thin-wall part machining is effectively avoided, the size precision, shape tolerance and surface smoothness of parts are guaranteed, and the rejection rate of the parts is reduced; and meanwhile, damage to the inner wall caused by excessive supporting is prevented through the process plate (or the follow-up process plate), and the qualification rate of parts is further increased.

The invention relates to the technical field of laser cutting, and discloses a laser cutting sectioning device for blanking of a large-diameter thin-wall low-thermal-expansion alloy pipe, which comprises a worktable, a vertical plate is arranged at the top of the worktable, an alloy pipe body is arranged on the vertical plate, a telescopic cylinder is further arranged on the vertical plate, and a laser cutting head is arranged at the output end of the telescopic cylinder. A U-shaped frame is further arranged at the top of the workbench. The device further comprises a material receiving unit arranged on the workbench. The material receiving unit comprises a material receiving component, a discharging component and a locking component which are arranged on the workbench. According to the laser cutting sectioning device for blanking of the large-diameter thin-wall low-thermal-expansion alloy pipe, cutting dregs can be accurately received through the receiving hopper and the receiving box of the receiving assembly, and the dregs are shaken off through vibration during unloading, so that the damage to the smoothness of the inner wall is avoided. The fluid resistance and the corrosion risk are reduced, the follow-up cleaning difficulty is reduced, the service life of the pipeline is prolonged, and the medium circulation stability in the high-end fields such as aerospace and the like is ensured.

The invention provides a high-strength winding thin-wall SiC composite cladding tube and a preparation method thereof. A preparation method of a high-strength winding thin-wall SiC composite cladding tube comprises the steps that silicon carbide fibers are wound and laid around a core mold, the winding pre-tightening force is smaller than or equal to 10 N. The winding mode comprises the first mode that one layer of annular winding is conducted firstly, then one layer of spiral winding is conducted, and the number of fiber intersection points in the whole annular direction at a certain position of the outer surface of the core mold is 1. One-layer annular winding is carried out firstly, then two-layer spiral winding is carried out, the number of fiber intersection points in the whole annular direction at a certain position of the outer surface of the core mold is 3, and a prefabricated body is obtained; carrying out a densification deposition process on the preform, wherein the densification deposition process comprises PyC pyrolytic carbon interface deposition, CVI chemical vapor infiltration and CVD chemical vapor deposition; and precise inner circle and outer circle machining is conducted, and the SiC composite cladding pipe is obtained. According to the preparation method disclosed by the invention, through a specific dry winding mode and a densification deposition process, the SiC composite material tube blank is higher in density and better in mechanical property.

The invention relates to a flame-retardant PC resin composition meeting a thin-wall S.2 needle flame standard as well as a preparation method and application thereof. The flame-retardant PC resin composition comprises the following components in parts by weight: 92-98 parts of PC resin, 0.1-1 part of a sulfonate flame retardant, 0.1-1 part of a toughening agent, 1-3 parts of phosphate, 0.5-2 parts of a boron-containing compound, 0.5-2 parts of fumed silica and 0.5-1 part of an auxiliary agent. The preparation method comprises the following steps: stirring and fully mixing the raw materials in a high-speed mixer, conveying, shearing and mixing by a double-screw extruder through screws, and melting, homogenizing, drawing, cooling and pelletizing the materials to obtain the flame-retardant PC resin composition meeting the thin-wall S.2 needle flame standard. Compared with the prior art, the composite material not only has stable flame retardant property, meets the thin-wall S.2 needle flame standard, but also has relatively excellent mechanical property and thermal stability, is relatively low in cost, and is very suitable for being applied to the fields of power adapters, OAs, new energy batteries, electronics and electrics, electric control boxes, switches and the like.

The invention discloses a thin-wall shell plastic part injection molding process parameter multi-objective optimization method, which is based on an RIME-RF-MOGWO framework, takes a simulation sample as a research object, selects a volume shrinkage rate and a buckling deformation amount as optimization objectives, and firstly adopts SMOTE to process a data imbalance problem; establishing a nonlinear mapping relation between the process parameters and the quality target by using RF; an RIME is introduced to optimize the hyper-parameter of the RF; multi-objective optimization of process parameters is realized in combination with MOGWO, and a Pareto frontier solution set is obtained through non-dominated sorting and a congestion degree control mechanism. A multi-round optimization and simulation verification result shows that the multi-objective optimization method for the injection molding process parameters of the thin-wall shell plastic part can effectively obtain an optimal process parameter combination, the volume shrinkage rate is reduced by 19.02%, the buckling deformation amount is reduced by 50.63%, and the molding quality of the thin-wall plastic part can be remarkably improved.

The invention discloses a copper-stainless steel bimetal thin-wall part and a preparation method thereof, and belongs to the technical field of metal material processing. The preparation method comprises the following steps that a copper material and a steel material are prepared into a composite blank; performing first destressing heat treatment on the composite blank to obtain a bimetal cylindrical blank; the bimetal cylindrical blank is subjected to repeated spinning, and a bimetal spinning prefabricated part is manufactured; and after second destressing heat treatment is conducted on the bimetal spinning prefabricated part, machining is conducted till the dimensional tolerance of the copper-stainless steel bimetal thin-wall part is achieved. By means of the method, the metal advantages of the copper material and the steel material can be combined, low-cost manufacturing of the high-performance composite part is achieved, and therefore a traditional metal composite scheme of welding or bolt connection is replaced.

The invention relates to the technical field of pipe preparation, and particularly provides a small-caliber high-precision thin-wall GH738 pipe preparation method which comprises the following steps: step 1, obtaining a GH738 bar blank; secondly, the bar is machined into a GH738 pipe blank; 3, a semi-finished product GH738 pipe is obtained; 4, after the semi-finished GH738 pipe is cleaned, a finished product vacuum heat treatment procedure is conducted, and the structure and performance of the pipe are adjusted; step 5, rounding and straightening pretreatment; and 6, the small-size high-precision thin-wall GH738 pipe is obtained. The outer diameter is 5-8 mm, the outer diameter tolerance is-0.01--0.03 mm, the wall thickness is 0.5-1.0 mm, the wall thickness tolerance is + / -0.05 mm, and the straightness is smaller than 0.3 mm / m. The method has the advantages that the prepared small-size high-precision thin-wall GH738 pipe is higher in size precision, better in straightness, lower in surface residual stress and higher in eddy current flaw detection qualification rate, and the pipe yield is remarkably increased. And the preparation process is simple, has strong repeatability, is suitable for industrial large-scale production, and has wide popularization value and remarkable economic benefits.

The invention discloses a halogen-free flame-retardant polyphenyl ether composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The composite material is prepared from the following components in parts by weight: 40-70 parts of polyphenyl ether resin, 10-30 parts of high impact polystyrene resin, 4-8 parts of SEBS (Styrene-Ethylene-Butylene-Styrene) resin, 5-10 parts of organic and inorganic composite flame retardant, 3-8 parts of phosphate flame retardant, 1-5 parts of polyborosiloxane and auxiliaries. The core of the organic-inorganic composite flame retardant is that the organic-inorganic composite flame retardant is a core-shell structure particle which takes magnesium-aluminum hydrotalcite and nano silicon dioxide as a core and melamine cyanurate as a shell according to a specific proportion. Through the synergistic effect of all the components, especially the core-shell structure, the dispersity and interfacial compatibility are effectively improved, so that the material achieves excellent flame retardance while maintaining high impact strength and heat resistance, and the UL-94 V-0 grade can still be met even under the condition of a 0.8 mm thin wall. The material is particularly suitable for preparing thin-wall electronic and electrical appliance shells and new energy automobile parts with harsh performance requirements.

The invention relates to the technical field of investment casting, in particular to an investment casting shell making method of an air inlet casing casting and a shell. The method comprises early-stage preparation (high-precision wax mold manufacturing and module assembling), a shell manufacturing process (shell manufacturing of a surface layer, a transition layer and a back layer) and subsequent procedures (dewaxing, roasting, pouring, cleaning and detecting). The surface layer and the transition layer are dried by silica sol-based paint (zircon powder / mullite powder) in cooperation with strong wind power, so that the surface quality and the initial strength are ensured; the back layer is hardened by adopting a water glass-based coating (coal gangue powder) matched with ammonium chloride, so that the supporting strength and air permeability of the main body are provided. By optimizing a composite shell-making material system and process parameters, the problem that in the prior art, the strength, the air permeability, the quality and the efficiency of a shell are difficult to consider at the same time is solved, and the method is particularly suitable for production of complex thin-wall castings such as aero-engine air inlet casings with extremely high requirements for the surface quality, the size precision and the internal structure; the defects of air holes, slag inclusion and the like can be effectively reduced.

The invention discloses an upper cover structure and application of the upper cover structure to a new energy automobile battery box. The upper cover structure is made of a continuous glass fiber reinforced PPS thermoplastic composite material. The top surface of the upper cover structure adopts a thin wall of which the thickness is less than or equal to 2.00 mm; radial reinforcing ribs are arranged on the upper cover structure; the flange edge of the upper cover structure is welded with a reinforcing strip through vibration friction; the upper cover structure is applied to the new energy automobile battery box. According to the upper cover structure and the application of the upper cover structure to the battery box of the new energy automobile, the novel battery box upper cover structure which can meet multiple requirements of light weight, high strength, high production efficiency, environmental protection, recyclability, thermal runaway safety performance and the like at the same time is provided through innovation of materials, structures and processes, and the upper cover structure has wide application prospects.

The invention provides a low-warpage PC composite material as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The low-warpage PC composite material is prepared from the following raw materials in parts by mass: 45 to 55 parts of PC resin, 15 to 20 parts of modified glass fiber, 8 to 12 parts of filler, 0.8 to 1.2 parts of a core-shell type crystal nucleation warpage inhibitor, 5 to 8 parts of a toughening agent, 0.2 to 0.4 part of an antioxidant, 0.3 to 0.5 part of a lubricating agent and 0.2 to 0.3 part of an ultraviolet light absorber. The PC composite material provided by the invention has low warpage, high rigidity and high fluidity, and can be directly subjected to injection molding to obtain the thin-wall air deflector.

The invention discloses a method for generating a metal 3D printing supporting structure, and relates to the technical field of additive manufacturing. The method comprises the steps that geometric analysis is conducted on a three-dimensional model of a to-be-printed part, and areas needing to be supported are recognized and classified into a strong supporting area, a weak supporting area and a transition supporting area; different laser scanning parameters are configured for different supporting areas, a supporting main body adopts low-energy density parameters to form a porous structure, a contact interface adopts discrete dot matrix scanning to form weak connection, and a transition layer with gradually-changed parameters is arranged between the supporting main body and the contact interface; a composite supporting structure composed of hexagonal honeycomb units and vertical thin walls is generated; in the printing process, high-frequency micro-vibration is applied to the support to improve powder fluidity, and sweep-frequency vibration is applied to the interface layer to weaken interface bonding; thermal cycle treatment is carried out after printing, and interface automatic cracking is achieved through the difference of thermal expansion coefficients; and finally, support falling is accelerated through resonance frequency vibration. Through the synergistic effect of the scanning parameter gradient, the structure optimization design and the vibration auxiliary technology, the removability of the support is remarkably improved, the material consumption is reduced, and the surface quality of the part is improved.

The invention belongs to the technical field of silica gel coating, and particularly relates to an automatic silica gel coating device and method for a cylindrical thin-wall body. The device comprises a rack, and a material rotating mechanism, an inner ring gluing mechanism, an outer ring gluing mechanism, a glue supply mechanism and a grating safety system are arranged on the rack; the grating safety system is arranged on the front side of the rack, the inner ring gluing mechanism and the outer ring gluing mechanism are located on the two sides of the material rotating mechanism, and the glue supply mechanism is located on the rear side of the rack. A material pressing mechanism is arranged over the material rotating mechanism, a controller is further arranged on the rack, and the material rotating mechanism, the inner ring gluing mechanism, the outer ring gluing mechanism, the material pressing mechanism, the glue supply mechanism and the grating safety system are all electrically connected with the controller. Through the cooperative operation of the material rotating mechanism, the inner ring gluing mechanism and the outer ring gluing mechanism and the precise regulation and control of the controller on the glue supply flow, the pressing force and the motion trail, high-quality automatic coating on the inner wall and the outer wall of a cylindrical object or the outer wall of a columnar object is achieved.

The invention discloses a waterproof photovoltaic support for a color steel tile roof, and relates to the technical field of photovoltaic systems. The waterproof device comprises a plurality of waterproof bases linearly installed at a plurality of wave crests of the color steel tile, each waterproof base comprises a plurality of bases, a waterproof cover plate, a plurality of connectors and a set of end covers, the bases are installed at the wave crests of the color steel tile through fasteners, and the connectors are fixed to the tops of the two bases through bolts correspondingly; and the waterproof cover plate is fixed between the plurality of bases and the plurality of joints and covers the wave crest area of the color steel tile. The novel waterproof bases are designed, discrete and point-shaped distributed miniature bases are innovatively adopted, each base is only composed of two small bases, a thin-wall waterproof cover plate, two end covers and a connector, and compared with a free rail covering the whole support path, materials are saved to the maximum extent; and the cost of the base part is directly and remarkably reduced, and great economic attraction is achieved for large-scale application.

The invention relates to a composite spinning forming method for a large-length-diameter-ratio thin-wall barrel, which fully utilizes the advantage that a barrel-shaped part keeps high forming precision in positive spinning forming and the characteristic that the barrel-shaped part gets rid of the limitation of the axial size of equipment in negative spinning forming, and adopts a composite spinning forming method in which two passes of positive spinning and one pass of negative spinning are matched. And high-quality, high-efficiency and low-cost production of the large-length-diameter-ratio thin-wall cylinder is realized. The axial auxiliary limiting device is designed to provide boundary condition compensation for reverse spinning forming, in the reverse spinning forming process, a formed part is not subjected to the load effect, the requirement for the hardness of a spinning mold is met, and necessary conditions are provided for composite spinning forming of the large-length-diameter-ratio thin-wall barrel. The axial auxiliary limiting device comprises an annular positioning module and an annular limiting module. According to the device, the axial distance between the quasi-large-length-diameter-ratio barrel and the mold can be compensated in a stepless mode within the preset stroke, frequent mounting and dismounting are not needed, and adjusting operation is easy and convenient.

The application relates to the technical field of film drying, and discloses a drying and forming device for films, which comprises a shell, two groups of cooling cylinders are rotatably installed in the opposite inner walls of the shell, rotary joints are installed at the two ends of the two groups of cooling cylinders, connecting pipes are installed on the sides, away from the corresponding cooling cylinders, of each rotary joint, and the two cooling cylinders are staggeredly arranged, the two groups of staggeredly rotating cooling cylinders are arranged in the shell, drying mechanisms are arranged on the two sides of the corresponding cooling cylinders, and the film material can be subjected to regional and adjustable drying treatment during movement; when the film passes through the staggeredly arranged cooling cylinders, film sections with different thicknesses can obtain differential heat dissipation effects due to the difference in contact area with the cooling cylinders; in cooperation with the drying mechanisms, the thin-wall region can be prevented from being damaged due to excessive heating, and the thick-wall region can be ensured to be fully dried, so that the uniformity and yield of film material drying and forming are improved, and the problem of poor adaptability of traditional devices to film thickness changes is effectively solved.

The invention relates to the technical field of thermal protection composite materials, in particular to a thin-wall gradient thermal protection structure and application. The thermal protection structure sequentially comprises, along a thickness direction, an outer surface layer; the ablation-resistant layer is composed of at least one layer of quartz fiber cloth, and the distance d between the outer side face of the quartz fiber cloth and the outer surface layer is larger than 0 mm and smaller than or equal to 0.3 mm; the heat insulation layer is positioned on the inner side of the ablation-resistant layer; the total thickness of the thermal protection structure is smaller than or equal to 5 mm, and the overall density of the thermal protection structure is smaller than or equal to 0.6 g / cm. According to the thin-wall gradient thermal protection structure, under the extreme lightweight constraint that the thickness is smaller than or equal to 5 mm and smaller than or equal to 0.6 g / cm < 3 >, the extra thermal insulation gain larger than or equal to 5% is obtained through the principle of gradient layering and millimeter-level near-wall ablation resistance.

The application relates to the field of aerospace technology and discloses a cabin section structure suitable for a recoverable carrier rocket, which comprises a cabin section structure main body, the cabin section structure main body is mainly composed of a thin wall, a high rib and a grid, and the thin wall and the high rib are integrated through the spinning, milling and turning modes to process an aluminum alloy cylinder ingot, so that the design time of the rivet structure is reduced, and the design efficiency is improved. A large number of part assembly designs are needed for a traditional semi-hard shell structure, including rivet design. The rivet design is related to hole making requirements, positioning size and rivet specifications and the like. The design work usually accounts for 30-40% of the workload of a designer. However, the unit wall plate structure of the application cancels the rivet structure, realizes rivet avoidance design, and greatly improves the design efficiency of the structure product.

The embodiment of the invention provides a thin-wall metal material thinning method which comprises the steps that 1, the laser spot interval and the feeding frequency are calculated according to laser scanning parameters, and the laser scanning parameters comprise the feeding interval; 2, the thin-wall metal material component is obtained, and a to-be-machined face of the thin-wall metal material component is subjected to laser scanning according to the light spot interval to form a plurality of first-round micropores which are arranged at intervals; according to the light spot spacing, the feeding spacing and the feeding times, multiple rounds of circulating laser scanning are conducted on the to-be-machined face in sequence so that gaps between the first round of micropores can be filled, and a thin-wall metal material component with a loose modified layer is obtained; and 3, the loose modified layer is removed, so that thinning of the thin-wall metal material component is achieved. According to the embodiment, the adverse effect of heat accumulation on the workpiece in the laser machining process can be reduced while the thin-wall metal material component is thinned, the deformation resistance of the ultra-thin workpiece is improved, and the surface flatness of the workpiece is guaranteed.

The utility model relates to the technical field of composite material preparation, in particular to a thin-wall composite material plate structure with a hollow runner inside, which is formed by co-curing an upper composite material panel, a lower composite material panel and a runner layer clamped between the upper composite material panel and the lower composite material panel through resin, the problems that in a traditional technology, a flow channel is prone to being blocked, and interface bonding is weak are solved, and the heat pipe has the advantages of being good in structural integrity, excellent in sealing performance, light in weight and high in strength and is particularly suitable for heat management structural parts in the fields of aerospace, new energy automobiles, high-end equipment and the like.

The invention discloses a processing method of a thin-wall high-temperature alloy super-long inner cone welding assembly with a molded surface, which comprises the following steps of: dividing the inner cone welding assembly into a first section, a second section and a third section from the large-diameter end to the small-diameter end of the inner cone welding assembly along the height direction of the inner cone welding assembly; for the first section, firstly welding the mounting edge and the inner cone cylinder, then welding the part, corresponding to the first section, of the inner cone cylinder with the mounting edge after butt joint, and then welding the first reinforcing hoop on the inner wall of the part, corresponding to the first section, of the inner cone cylinder; aiming at the second section, a second reinforcing hoop and a third reinforcing hoop are respectively welded on the inner wall of the part, corresponding to the second section, of the inner cone cylinder; aiming at the third section, a fourth reinforcing hoop is welded on the inner wall of the part, corresponding to the third section, of the inner cone barrel; and finally, the first section and the second section are subjected to argon arc welding in the circumferential direction, and then the second section and the third section are subjected to argon arc welding in the circumferential direction. A segmentation scheme and a limiting clamp are adopted for clamping and welding, the requirements for size and shape precision are met, the machining efficiency of the whole welding assembly is improved, and welding deformation is effectively controlled.

The utility model discloses a thin-wall part flexible inner supporting device with a cam mechanism. The thin-wall part flexible inner supporting device comprises a base, a supporting body fixed to the upper surface of the base, an inner supporting chuck fixed to the upper end of the supporting body, a horizontal rotating rod rotationally connected to the middle of the supporting body, and a push rod vertically connected to the middle of the supporting body. The horizontal rotating rod is rotated until the thicker side of the cam in the middle of the horizontal rotating rod faces upwards, the push rod is jacked upwards, and the conical positioning section of the push rod pushes the positioning plate of the inner supporting chuck to expand outwards in the radial direction, so that the thin-wall cylindrical part is clamped and positioned; when the thin-wall cylindrical part is released, the horizontal rotating rod is rotated till the thin side of the cam faces upwards, the positioning plate of the inner supporting chuck retracts in the radial direction under the elastic force effect of the elastic connecting cylinder, and the thin-wall cylindrical part can be detached from the inner supporting chuck. According to the flexible inner supporting device for the thin-wall part, clamping is flexible, and deformation caused by uneven clamping force can be greatly reduced.

This utility model discloses an indexable roughing and finishing composite corn milling cutter, comprising a cutter body, a cutter shank fixedly mounted at the end of the cutter body, three spiral stepped grooves evenly distributed around the axis on the outer side wall of the cutter body, a plurality of roughing inserts sequentially mounted on the stepped surface of the spiral stepped grooves, the foremost roughing insert protruding from the end face of the cutter body, a clearance hole provided on the spiral stepped groove, and chip removal grooves provided on both the upper and lower sides of the clearance hole; a PCD insert, fixedly mounted on the outer side wall of the cutter body on one side of the roughing inserts, and a water outlet hole provided in the middle of the cutter body along its axial direction, the water outlet hole penetrating the cutter body and the cutter shank. This utility model can solve the problems of existing milling cutters in machining subframes, such as long repetitive positioning cycle time in roughing and finishing side milling, thin wall and poor rigidity of the subframe after roughing, and easy vibration during finishing, which affect machining efficiency and product surface quality.

This application discloses an optical and electrical composite cable designed for simultaneous installation within pipelines, along with its processing and installation methods. By providing a composite cable with a thin wall and compact overall size, it allows the commercially available thin pipelines ranging from 6 mm to 13 mm in diameter to accommodate both optical and electrical cables in a single pass. This design reduces the amount of pipeline material needed and shortens installation time, while broadening the potential applications for these types of pipelines and improving their utilization. Since the optical and electrical composite cable is installed within a pipeline, it does not require self-supporting overhead structure, which simplifies its design. The thinner optical cable is connected to the thicker electrical cable, allowing the electrical cable to provide necessary tensile strength to the optical cable. This simplified approach to tensile strength ensures that the composite cable meets required strength standards despite its smaller size.

The present application relates to the chuck cutting mode in the field of machining, in particular to a high-precision thin-wall flange part turning cutting deformation control method. The method solves the technical problem of size precision reduction caused by direct cutting of the workpiece chuck in the prior art when machining the thin-wall flange part. The method comprises the following steps: rough turning: rough machining of the outer circle and inner hole of the part; solid solution aging: solid solution aging of the part to remove stress; semi-fine turning: semi-fine turning of the inner hole and outer circle of the part to release stress again; turning shape: clamping the small end of the part, machining all sizes of the part from the large end to the small end at one time, and then machining the process groove, at this time, the workpiece cannot be cut off, and the process is completed; flat end face: clamping and positioning the large end face of the workpiece, using layer-by-layer cutting method at the chuck, and direct cutting is not allowed, so that the stress generated in the process of cutting the chuck is slowly released, and the relevant sizes can be effectively guaranteed without deformation after cutting.