25 results about "Gradual transition" patented technology

The invention provides a design method for balancing cutting force between cutting edges of a symmetrical gradually-changing end mill, and relates to the technical field of shape characteristics of milling cutters, through the design of the gradually-changing cutting edges, a truncated edge is evolved into a sharp shape, and multifunctionality from rough machining to finish machining is achieved; the gradual change characteristic remarkably improves the chip breaking effect in the cutting process, tool adhesion is effectively prevented, meanwhile, cutting chip breaking is promoted by thinning cutting chips and reducing the bending rigidity of the cutting chips, in addition, due to the symmetrical design of the odd number of cutting edges and the even number of cutting edges, cutting force is balanced, cutting loads are reduced, abrasion is reduced, and the service life of the tool is prolonged. Further, the machining stability is enhanced, and high-quality surface quality and machining precision are ensured; through deep analysis of cutting force and distribution thereof, vibration is effectively reduced through the design, the stability of the cutter is further improved, the service life of the cutter is further prolonged, meanwhile, the fracture state of cuttings is optimized, and the machining efficiency is improved.

The invention belongs to the technical field of centrifugal processes, and particularly discloses a centrifugal process in composite forming of a large tubular pile, which comprises the following five centrifugal stages: a low-speed centrifugal stage, a medium-low-speed centrifugal stage, a medium-speed centrifugal stage, a high-speed centrifugal stage and a shutdown centrifugal stage, an S-shaped acceleration curve is generated through cubic spline interpolation between every two adjacent centrifugal stages for speed adjustment, and the centrifugal speed adjustment is changed from instant switching to 8-12 s gradual transition acceleration from the middle-low speed centrifugal stage to the middle speed centrifugal stage; and the large-particle-size aggregate and the fine-particle aggregate are kept relatively synchronous when the radial position is adjusted through gradual transition acceleration. A five-stage progressive rotating speed control strategy is adopted, an S-shaped acceleration smoothing algorithm is introduced into a transition area of each stage, the acceleration change rate is controlled to restrain sudden change of a centrifugal force field, and uniform particle size distribution of concrete materials in the centrifugal forming process is achieved in cooperation with a high-precision rotating speed feedback system and a dynamic balance compensation mechanism.

This invention relates to transition layer materials and welding processes for welding dissimilar steel and aluminum materials, belonging to the field of welding technology. The transition layer material for welding dissimilar steel and aluminum materials of this invention comprises a copper layer, a copper alloy layer, and a zinc alloy layer arranged sequentially; the copper layer is adjacent to the steel base material, and the zinc alloy layer is adjacent to the aluminum base material; the copper content in the copper alloy layer is 62.0%-64.0%; the zinc content in the zinc alloy layer is 89.0%-91.0%; the mass ratio of the copper layer, copper alloy layer, and zinc alloy layer is (0.9-1.1):(2.3-2.7):(1.8-2.2). By sequentially setting the copper layer, copper alloy layer, and zinc alloy layer between the steel base material and the aluminum base material, a gradual transition from the steel base material to the aluminum base material is achieved, effectively avoiding the formation of brittle Fe-Al intermetallic compounds during direct welding, and enhancing the mechanical properties and durability of the welded joint.

The invention belongs to the technical field of tunnel engineering TBM construction, and particularly discloses a layered backfill reinforcement method under the uncovered working condition of a TBM starting end, and the method comprises the following steps: carrying out regional collaborative backfill by adopting concrete and dense clay to form a flexible bearing layer, and sequentially connecting the flexible bearing layer with a ground road; performing height-limited backfilling on the flexible bearing layer to form a flexible buffer transition layer; a transition sequential connection area is arranged at the joint of the TBM starting end backfill area and the existing municipal road; and quality detection is carried out to ensure that design requirements are met. According to the layered backfill reinforcement method for the TBM starting end under the non-earthing working condition, through the layered design of rigid supporting, flexible buffering and gradual change sequential connection, the requirements for stratum stability and TBM cutter head cutting under the non-earthing working condition are met, the influence of additional loads and sedimentation on municipal roads is avoided, construction and operation safety is guaranteed, and the construction period is shortened. The method can be suitable for complex terrain conditions of an urban rail transit TBM starting end, and is high in practicability.

The invention relates to the technical field of new energy axles, in particular to a hydraulic expansion forming type light-weight new energy axle which comprises a main beam body, end connecting parts arranged at the two ends of the main beam body and a differential mechanism shell connecting base arranged in the middle of the main beam body. The main beam body comprises an outer-layer pipe wall and a lining sleeve arranged on the inner side of the outer-layer pipe wall. The lining sleeve sequentially comprises an A-section reinforcing area, B-section gradual transition areas located on the two sides of the A-section reinforcing area and a C-section non-reinforcing area located on the outer side of the B-section gradual transition areas in the axial direction. And the main beam body is provided with a controllable collapse triggering area in the C-section non-reinforced area. Compared with the prior art, the outer-layer pipe wall and the lining sleeve are laminated in the A-section reinforcing area adjacent to the differential shell connecting base, so that the bending resistance and torsion resistance of the section are improved, and the equivalent wall thickness is increased; and meanwhile, a lining sleeve is omitted and thinned in a C-section non-reinforced area far away from a key load transmission path, so that the material consumption is reduced, and the unsprung mass is reduced.

The invention belongs to the field of mechanical engineering, particularly relates to a method for improving shell forge piece anode discoloration, and aims to solve the problem of uneven color and luster of a bottom corner area of a shell forge piece after anodic oxidation. According to the method, the structure of a lower mold cavity is optimized, a material storage area matched with the outline of a product is additionally arranged at the corner of the bottom of a corresponding shell, a slowly-changing transition area is formed, and metal is guided to flow stably; during forging and pressing, the blank fills the cavity under the pressure and enters a material storage area to reduce the local flow speed and homogenize the deformation; and after forming, CNC machining and anodic treatment are carried out to obtain the non-heterochromatic forge piece. Geometric parameters of the material storage area are determined based on simulation optimization, and precision machining is adopted to ensure the surface quality. According to the method, anode discoloration is effectively eliminated, the material utilization rate is increased, the CNC machining period is shortened, the process robustness is enhanced, and the comprehensive manufacturing cost is remarkably reduced.

The invention relates to the technical field of tunnel engineering construction, in particular to a steel arch assembly for assisting a tunnel in gradually changing into a main tunnel and a construction method.The steel arch assembly comprises a plurality of first steel arches, and the ends, close to a main tunnel, of the first steel arches are sequentially provided with multiple sets of gradually-changing steel arches in the extending direction of the auxiliary tunnel; the multiple sets of gradually-changed steel arches comprise a plurality of second steel arches, a plurality of third steel arches, a plurality of fourth steel arches, a plurality of fifth steel arches and a plurality of sixth steel arches which are sequentially connected in the extending direction. The top outlines of the multiple sets of gradually-changing steel arches are gradually changed into straight lines from arc shapes, the supporting structure which smoothly transits from the section of the auxiliary tunnel to the rectangular section of the main tunnel is jointly formed, and the construction method comprises the steps of construction preparation of the gradually-changing section, excavation through a bench method and gradually-changing supporting, section gradually-changing and measurement control, intersection reinforcing supporting and main tunnel connection and main tunnel excavation. Safe and smooth transition from the auxiliary tunnel to the main tunnel is achieved, surrounding rock disturbance is reduced, and supporting stability is enhanced.

The application provides a cutting line of a metal mask. Along the length direction of the cutting line, the cutting line is alternately arranged by a first etching blind hole row and a second etching blind hole row, the first etching blind hole row comprises odd etching blind holes, the second etching blind hole row comprises even etching blind holes; the cutting line has a center line along the length direction, and the first etching blind hole row and the second etching blind hole row are symmetrical about the center line. Through the above arrangement, the cutting line can have certain strength, can meet the requirement that the metal mask is not pulled off near the cutting line when the metal mask is stretched, can meet the requirement that the metal mask can be smoothly torn along the cutting line when the metal mask is split, and the effective area is not damaged; and the stress near the cutting line on the metal mask can be gradually transitioned, and the bulging phenomenon is reduced.

The invention belongs to the technical field of constructional engineering displacement, and particularly relates to a combined raft plate structure integrating rotating and translation functions, which comprises a rotating raft plate, a slideway beam stand column is arranged on the side surface of the rotating raft plate, and a slideway beam is fixedly connected to the side surface of the slideway beam stand column. According to the invention, an integrated slideway system is realized: a gradual transition node of an arc-shaped rotating slideway and a linear translation slideway is designed, so that split construction is avoided, and seamless connection of two displacement modes is realized; bIM precise control is conducted, specifically, unified modeling is conducted through the BIM technology, a rotation center and a translation datum line are precisely planned, and it is ensured that the whole-process error of composite displacement is smaller than or equal to + / - And composite stress optimization: analyzing the superposed load of rotation and translation through finite elements, specifically adjusting raft reinforcing bars and the section of the slideway beam, reducing the structural safety risk and improving the construction efficiency, wherein the slideway beam is formed through one-time pouring, the working procedures of template disassembly and assembly and node reconstruction are reduced, the construction period is shortened, and the material loss is reduced.

The invention provides a grinding wheel, a preparation method and wafer thinning equipment and method. The grinding wheel comprises a grinding wheel base body, an adhesive layer and a grinding material layer. The adhesive layer is provided with two or more small layers from bottom to top, the thermal expansion coefficients of the small layers are monotonically decreased, the longitudinal thermal conductivity of the small layers is monotonically increased, the surface energy of ceramic filler in raw material composition is monotonically decreased, and the rigidity of the ceramic filler is monotonically decreased; each small layer is subjected to induced orientation treatment by using a magnetic field perpendicular to the direction of the plane where the small layer is located before curing; according to the adhesive layer, gradient CTE composite modifier integrated design is matched with vertical heat conduction filler gradient and orientation design, gradual transition of the thermal expansion coefficient and vertical heat conduction from the grinding wheel base body side to the grinding material layer side is achieved, and a penetrating vertical heat conduction chain in the top-bottom direction is formed to open up a direct path for longitudinal efficient heat dissipation.

This invention discloses a connection structure and modeling method for the tailrace guide section of a hydropower station. From the tailrace tunnel to the diversion tunnel, the cross-sectional shapes of the connection structure are successively circular, first archway-shaped, and second archway-shaped. The circular cross-section and the first archway-shaped cross-section are connected by a first gradual transition section; the first archway-shaped cross-section and the second archway-shaped cross-section are connected by a second transition section. The projection of the second transition section on the bottom surface is arc-shaped. This invention adopts a circular-archway-archway-archway arrangement, achieving a smooth transition through gradual transition sections, avoiding abrupt changes in water flow caused by square cross-sections in existing technologies. This effectively reduces turbulence intensity, pressure fluctuations, and optimizes water flow efficiency. The modeling method uses parametric design to accurately construct the model, then performs mesh generation, and finally optimizes the structural design through numerical simulation analysis, providing reliable guidance for engineering practice.

The utility model provides a prevent deformation's box cover die casting die for motorcycle relates to die casting die field, prevent deformation's box cover die casting die for motorcycle includes movable mould and fixed mould, is equipped with the cavity on fixed mould, the side type core is fixed to the telescopic end of telescopic part, telescopic part can drive side type core and move into the cavity, the inside of cavity is provided with the recessed structure of tapering, at least one filling groove is equipped on the lateral wall of recessed structure of tapering, and the gradually transition structure that filling groove is shallow from both sides to middle, the fixed mould is provided with the type core on movable mould, and the type core is corresponded to the cavity and is provided, the utility model discloses a gradually transition structure's forming groove that is shallow from both sides to middle is arranged, and after the solidification of aluminium alloy liquid, a convex structure corresponding to filling groove will be on the surface of casting, which is convenient for offsetting the mould holding force of opposite direction of product local larger, and the size of final die casting ejection meets the drawing requirement tolerance requirement, reduces the deformation problem.

The present application relates to the technical field of double-color injection molding INS film piece, and discloses a method for avoiding surface stress marks of double-color injection molding INS parts, comprising the following steps: S1, material preparation, S2, product preparation, S3, PC material thickness optimization, the thickness of PC material is designed as 2.5-3 mm, and the thickness of PC material is 1:30 transition optimized at the intersection of one-shot and two-shot, so that the PC thickness of the edge of the INS film piece is 1.8-2.3 mm; S4, PC+ABS material thickness design, the thickness of PC+ABS material gradually transitions from 0.2 mm at the intersection of one-shot and two-shot to 1.2-1.5 mm at the edge position; S5, injection molding process control and optimization, S6, post-processing, through the thickness optimization of one-shot material and two-shot material, PC material is fully laid on the entire part surface and is compounded with the INS film piece, the thickness of PC material is 1:30 transition optimized at the intersection of one-shot and two-shot, the injection stress is reduced, the surface stress mark phenomenon of the double-color INS film piece can be effectively avoided, and the obtained INS film piece product has good appearance quality.

The utility model discloses a rolling machining die for threads of a water cup, which can greatly improve the out-of-round problem of the threads and ensure that the height size of the threads at the mouth of the water cup reaches a preset value. Comprising a male die and a female die, and the male die comprises a male die body and a thread protrusion; the female die comprises a female die body and a threaded groove. The male die main body and the female die main body are circular; the thread protrusions and the thread grooves are wound around the circumferential side walls of the male die body and the circumferential side walls of the female die body correspondingly. A gap is formed between the thread groove and the thread bulge, and the spiral directions are opposite; each thread bulge is provided with a continuous single section and an overlapping section; the height of the overlapping section is not smaller than that of the single section, and the overlapping section and the single section are connected in a gradual transition mode.

This invention discloses a gradual transition structure between the conical surface and the folded edge surface of a carbon fiber loudspeaker diaphragm and its manufacturing method, belonging to the field of electroacoustic technology. The structure includes a diaphragm formed by one-time hot pressing of carbon fiber prepreg. The diaphragm has a conical main body and a folded edge surface located at the outer edge of the conical main body. A gradual transition zone is provided between the conical main body and the folded edge surface. The thickness of the gradual transition zone linearly changes from the thickness of the conical main body to the thickness of the folded edge surface, with a transition length ≥30mm. The gradual transition zone achieves continuous thickness variation through ply cutting angle control, and the ply cutting edge is beveled. This invention also discloses a manufacturing method for this gradual transition structure, including ply design, bevel cutting, and hot pressing. By controlling the ply termination position and bevel cutting angle, the interlaminar shear stress is reduced from approximately 38MPa in traditional structures to approximately 15MPa, increasing the fatigue life of the diaphragm bending area by 3-5 times. This invention solves the problem of interlaminar delamination caused by abrupt thickness changes at the bending root of large-diameter loudspeaker diaphragms, significantly improving the structural integrity and long-term reliability of the diaphragm.

According to the non-welding integrated straightening forming method for the two ends of the corrugated pipe, a middle corrugated section of the corrugated pipe is fixed through a profiling clamp, a curved surface clamping part of the middle corrugated section is matched with a waveform, and stable clamping is ensured through an anti-skid structure; secondly, the two ends of the corrugated pipe are stretched step by step through a power driving mechanism, a straight section integrated with a middle corrugated section is formed, and a smooth and convergent gradual transition area is naturally formed at the connecting position; and finally, the straight section is subjected to aftertreatment such as radial bulging, shaping, 45-degree inner chamfering and polishing, so that the flatness of the end face of the straight section is smaller than or equal to 0.1 mm, and the 90-degree bending frequency of the corrugated pipe is larger than or equal to 150 times. Through a welding-free integrated forming process, welding defects are avoided, stress concentration is eliminated, the liquid leakage risk is reduced, the original performance of materials is reserved, meanwhile, the machining efficiency and precision are improved, and the liquid cooling pipe connector is suitable for the pipeline connection requirement of high-end liquid cooling equipment.

The utility model relates to the technical field of coating, and particularly discloses a coating die head and coating equipment, the coating die head comprises an upper die head, a lower die head, a micrometer and a thinning block, a slit coating space is formed between the upper die head and the lower die head, the micrometer is arranged on the upper die head, the thinning block is located in the slit coating space and is in driving connection with the micrometer, and the lower die head is arranged in the slit coating space. The side wall, facing the lower die head, of the thinning block is of an arc-shaped structure protruding towards the direction of the lower die head. In the application, the thinning block plays a flow blocking role in the slit coating space, the side wall, facing the lower die head, of the thinning block is of an arc-shaped structure protruding towards the direction of the lower die head, and the arc-shaped surface design can provide gradual transition for slurry flowing, so that the flowing stability of slurry is kept, and flowing separation is avoided as far as possible; therefore, slurry accumulation and sharp point formation are reduced; and the arc-shaped surface can disperse surface tension and provide a buffer space for drying shrinkage of the slurry, so that formation of sharp points is inhibited, and the problem of deformation or cracking during drying shrinkage is avoided as far as possible.

The utility model relates to the technical field of massage devices, and more particularly to a type of hygienic massage insole for footwear. The technical result sought is achieved in that a corrective insole comprises a bed of variable thickness having a front portion, a middle portion and a rear portion, the top side of the bed having rounded protruding massage points arranged thereon, and the underside of the bed having depressions therein with through-holes and further having built-in magnets, the insole being characterized in that on the top side the middle portion is higher than the front portion and transitions into the front portion through a radius of curvature of 24.5-34.5 mm, and the middle portion is divided into a first region with a raised edge and a second region with a raised edge, wherein the first region of the middle portion is lower than the second region, with a gradual transition between the two regions, the raised edge of the first region of the middle portion curves toward the first region with a radius of curvature of 12.4-72 mm, and the raised edge of the second region of the middle portion curves toward the second region with a radius of curvature of 7.5-91.8 mm, and the rear portion of the bed also comprises raised edges, wherein the rear portion is lower than the middle portion on the top side of the bed and transitions into the middle portion at an obtuse angle thereto. The technical result of the claimed utility model consists in a better distribution of pressure applied to the foot.

The present invention discloses a nozzle test device, which relates to the field of aerospace technology and is used to solve the problem that a rocket engine test bench cannot simulate the change process of the flow field of the nozzle caused by the change of flight altitude. The nozzle test device includes an ejector sleeve and a drive device. The ejector sleeve is used to be installed on the peripheral side of the outlet of the tested nozzle, and an annular gap is formed between the ejector sleeve and the peripheral side of the outlet end of the tested nozzle; the drive device is arranged on the peripheral side of the ejector sleeve, and the drive end of the drive device is dynamically connected to the outer wall of the ejector sleeve. The drive device is used to drive the ejector sleeve to move axially relative to the tested nozzle to adjust the axial position of the ejector sleeve relative to the outlet end of the tested nozzle. The nozzle test device provided by the present invention is used to realize the gradual transition between the separation state and the full flow state of the nozzle, simulate the gradual change of the flow field in the nozzle of the engine when the flight altitude changes, and cooperate with the rocket engine test bench to realize the test of the nozzle.

The present invention relates to a fan blade (3) made of composite material, wherein the fiber reinforcement of the fan blade includes a first strand (12) having a first stiffness, a second strand (13) having a second stiffness, and a third strand (14) having a third stiffness less than the first stiffness and greater than the second stiffness. The blade includes a first part (15), a second part (16), and a third part (17). The first part includes only the first strand (12), the second part includes only the second strand (13), and the third part is located between the first part and the second part (15, 16) and includes the first strand, the second strand, and the third strand (12, 13, 14). There is a gradual transition of properties at the interface between the different parts (15, 16, 17).

The utility model discloses a convenient extraction packaging structure which comprises a packaging bag body and a first extraction opening, the extraction opening is designed in a topological structure, namely, the transverse width of a first opening area is larger than that of a second opening area, and the contour line of the opening adopts a gradual transition mode. Even if the contents are in a compressed state in the packaging process, a user does not need to exert too large force when extracting the contents, the contents can be easily taken and used, and the problem that the first content or the first content is difficult to extract is effectively solved. Meanwhile, due to the fact that the first extraction opening is arranged on the top wall and the bending area in a striding mode, the depth that fingers need to stretch into when a user takes the remaining contents is remarkably shortened, the contact opportunity of the hand and the inner wall of the package is reduced, and therefore the pollution risk of the contents is effectively reduced.

A hyperbolic blade for a Francis runner, a manufacturing method and a Francis runner, belonging to the technical field of water turbines. The hyperbolic blade comprises a blade head (1) and a blade tail (2), wherein the blade head (1) and the blade tail (2) are integrally formed; the blade head (1) is in a gradual transition configuration, the blade head (1) comprises an upper transition section (3), a middle transition section (4) and a lower transition section (5), the upper transition section (3), middle transition section (4) and lower transition section (5) being sequentially connected end to end and integrally formed. The present invention takes into account both the operating parameters of the unit and the geometric parameters of a runner blade inlet, so as to obtain the distribution pattern of the maximum thickness of a blade inlet airfoil section, thereby effectively improving the flow regime at the blade inlet, meeting the requirements for large head variation and wide load operation; this improves the flow uniformity at the runner inlet between the crown (6) and band (7) under off-design conditions, reduces the value of pressure pulsation in a vaneless region under off-design conditions, enhances the overall stiffness and strength of the runner, and improves the operational stability of the unit.

It is disclosed a strut forming tool 3 and a method for using same. The strut forming tool (3) is configured to form an end portion (1b,1c) of an extruded tubular element (1) made of an aluminium alloy, such as a 6000 series aluminium alloy, into a connection area (12), wherein the strut forming tool (3) comprises: - a die (32) comprising an internal shaping surface (33) configured to shape the end portion (1b,1c) when the tubular element (1) and the die (32) is moved towards each other in an axial direction (A) of the tubular element (1) such that the end portion (1b,1c) is forced through the die (32); wherein the internal shaping surface (33) comprises: - a receiving section (33a) configured to receive the end portion (1b,1c) of the tubular element (1); - a final section (33c) with a cross-sectional area configured to define a cross-section of the connection area (12), wherein the connection area (12) comprises a flattened area (12a) and preferably at least one side wing (12b); and - a shaping section (33b) configured as a gradual transition from the receiving section (33a) to the final section (33c) and configured to convert the relative axial movement between the tubular element (1) and the die (32) into radial periphery compression forces on the end portion (1b,1c).

This invention discloses a user-decision-based intelligent furniture parameter adaptation and control method, relating to the field of intelligent furniture control technology. The target strategy of this invention employs a dual-track generation mechanism of basic and temporary strategies. Upon detecting a target user, the basic strategy is first retrieved; if a temporary strategy exists within a preset time, it is prioritized as the target strategy. During the execution phase, if immediate control is required, the intelligent furniture undergoes a gradual transition control; if immediate control is not required, a pre-reminder time is set, followed by gradual control after the reminder. The basic strategy in this invention is generated based on historical user behavior data, avoiding the rigidity problem of traditional single fixed strategies and accurately adapting to users' daily habits. The priority mechanism of the temporary strategy can flexibly respond to immediate needs, solving the pain point of untimely strategy adjustments in unexpected scenarios. Overall, it achieves personalized strategy generation and humanized execution, balancing intelligent automation and user autonomy, significantly improving the accuracy and user experience of intelligent furniture control.

The invention relates to a corrugated interlayer (10) for a heat exchanger (1), comprising: - a first section (11), comprising first flat walls (21), connected in pairs by first vertices (31) to form corrugations, each of the first vertices (31) comprising a first flat portion (310), - a second section (12), comprising second flat walls (22), connected in pairs by second vertices (32) to form corrugations, each of the second vertices (32) being constituted by a rounded portion (320), - a third section (13) interposed between the first section (11) and the second section (12), said third section (13) comprising third flat walls (23), connected in pairs by third vertices (33) to form corrugations, said third vertices (33) being configured to gradually transition from the shape of the first vertex (31) to the shape of the second summit (32). Figure of the summary: Figure 1