174 results about "Thin shells" patented technology

The invention provides an automatic clamping double-acting deep drawing die for a large deep-cavity basin-shaped part and a clamping method of the automatic clamping double-acting deep drawing die. The maximum contours of a lower die assembly, an edge pressing assembly and an upper die assembly of the deep drawing die are obviously larger than the effective clamping range of a working table, an outer sliding block and an inner sliding block of corresponding connecting parts of deep drawing equipment respectively; by designing a lower die assembly, a blank pressing assembly and an upper die assembly of an upper and lower surface profile variable cross-section combined structure, the problems of movement and connection interference between an oversized deep drawing die and a clamping system of automatic clamping equipment are solved by utilizing a die switching part of which the length and the width are respectively not greater than those of an equipment connecting part; triangular, annular and cross-shaped crossed and staggered reinforcing ribs are designed on the upper part of the shell structure mold, so that the structural rigidity of the shell structure mold part is enhanced, and the structural weight of the shell structure mold part is reduced; unequal and uniform external and internal guide mechanisms are designed between mold parts, and positioning pin holes and U-shaped mold containing grooves matched with equipment are designed in mold connecting parts, so that automatic posture adjustment of the overweight mold parts depending on gravity during hoisting is achieved. According to the technology, the machining width limit of double-acting deep drawing equipment can be remarkably improved, and the automatic clamping device can be popularized and applied to automatic clamping of ultra-long and wide large deep-cavity thin-shell part dies.

The invention provides a double-acting deep drawing die for a large deep-cavity basin-shaped part and an alternate deep drawing method. A lower die assembly, an edge pressing assembly and an upper die assembly of the deep drawing die are obviously provided with movement interference parts larger than a working table, an outer sliding block and an inner sliding block of deep drawing equipment respectively. By designing the lower die assembly, the blank pressing assembly and the upper die assembly of a non-uniform-section combined structure of the upper and lower surface outlines, the die-filling problem of an oversized deep drawing die and equipment is solved; by designing an external guide mechanism and an internal guide mechanism, the guide stroke is reasonably matched, and indirect guide transmission is adopted to solve the problem of reliable operation of the super-large deep drawing die; by utilizing the geometric height relation design between mold parts, the mold closing stroke and the mold opening stroke are controlled, and the displacement difference between the mold parts is controlled, so that rigid movement collision between the mold and equipment and between the mold parts is avoided. According to the technology, the machining potential of existing double-acting deep drawing equipment can be brought into full play, overall forming of the ultra-long and ultra-wide large deep-cavity thin shell part is achieved, and particularly the forming width limit can be increased to two times of the forming width limit in the prior art.

The invention discloses a simulation and prediction method for an instability phenomenon of a dielectric high-elastic thin shell. The method comprises the following steps: S1, constructing a mechanical-electric coupling constitutive model of a dielectric high-elastic material; s2, developing a numerical analysis method of the nonlinear response of the dielectric high-elastic thin shell; s3, simulating the overall instability phenomenon of the structure under large deformation; and S4, outputting the complex mechanical behavior under the predicted force-electricity coupling effect. Compared with the prior art, the method for simulating and predicting the instability phenomenon of the dielectric high-elastic thin shell has the advantages that the method can be used for capturing the complex shape and geometric change of the dielectric high-elastic thin shell and simulating the complex behavior of the thin shell under the force-electricity coupling effect.

The invention relates to the technical field of motor shell machining, in particular to a precise metal part cutting clamp which comprises a working table, a rotating seat is rotatably mounted on the working table, and a three-jaw chuck is mounted in the middle of the upper end of the rotating seat, and is characterized in that a supporting plate is fixedly mounted on the rotating seat through a plurality of frame connecting rods; an anti-overturning unit and an inner supporting unit are mounted on the supporting plate; before the motor shell is clamped, the motor shell can be pre-positioned, so that the three-jaw chuck can be aligned and centered without depending on larger clamping force, and the situation that the motor shell with a thin shell is deformed due to the fact that the clamping force is too large is prevented; when an inner hole of the motor shell is machined, the outer side of the motor shell can be radially supported, when the outer side of the motor shell is machined, the inner hole of the motor shell can be rigidly and internally supported, the overturning moment generated in the cutting process is effectively offset, the stability of the motor shell in the machining process is improved, and therefore the machining precision of the motor shell is ensured.

The invention discloses a vibration reduction bionic boring bar based on hedgehog thorns and biological eggshells, and relates to the technical field of boring bars, the vibration reduction bionic boring bar comprises a boring bar body, a cavity is formed in the boring bar body, the bionic eggshells which are transversely distributed at equal intervals are fixed in the cavity, and longitudinal reinforcing ribs are fixed in the bionic eggshells; the first transverse reinforcing rib, the second transverse reinforcing rib, the third transverse reinforcing rib and the longitudinal reinforcing rib which are designed based on hedgehog thorn bionics are fixed in the boring bar body, so that buckling and damage of the boring bar body are delayed, and the boring bar has an excellent external force resisting effect; the bionic eggshell which is designed in a bionic mode based on the thin shell structure of the biological eggshell is fixed in the boring rod body, so that stress distribution in the boring rod body is more uniform, the stress concentration effect is smaller, the mechanical efficiency is improved, and compared with an existing common solid boring rod, the effects of improving rigidity and reducing vibration are achieved; the vibration problem of the boring rod can be effectively solved, and the boring machining precision and machining efficiency are guaranteed.

The utility model provides an inner and outer double-cylinder thin-shell workpiece peripheral surface cutting processing clamp, which comprises a base and a rotating shaft, the rotating shaft is arranged on the base by using a rolling bearing, the rotating shaft is also coaxially and fixedly connected with a driving bevel gear, the driving bevel gear is respectively meshed with a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected with one end of a first lead screw, and the second bevel gear is fixedly connected with the other end of a second lead screw. The second bevel gear is fixedly connected to one end of a second lead screw, the other end of the first lead screw and the other end of the second lead screw are both in threaded connection with a sliding block, the thread rotating direction of the first lead screw is opposite to that of the second lead screw, the sliding block is further fixedly connected with an inner supporting seat, and an outer cylinder bottom groove is formed in the surface of the inner supporting seat. By the adoption of the technical scheme, the inner supporting seat synchronously and consistently supports the left side and the right side of the workpiece, the rigidity of the workpiece is improved, deformation of the workpiece is reduced, the cutting machining precision of the workpiece is improved, the symmetry of the workpiece is effectively improved, and the symmetry degree of the workpiece is improved.

The invention provides a dense pre-support structure thin shell mechanical modeling method, and relates to the technical field of tunnel engineering soft stratum pre-support structure mechanical modeling, and the method comprises the steps: calculating the equivalent stiffness of a pipe shed-jet grouting pile composite layer based on a Voigt theory; establishing a continuous thin shell model taking the control equation as a core; constructing a plastic / elastic disturbance partition in front of the tunnel face and a four-section type boundary condition of a supporting structure through a Pasternak foundation model; and solving the constructed continuous thin shell mechanical model through a finite difference method to obtain radial displacement, and completing mechanical modeling of the tunnel engineering soft stratum pre-supporting structure. The continuous thin shell model designed by the invention can provide high-reliability theoretical support for tunnel pre-support design.

The present application discloses a method for manufacturing a composite metal shell, comprising the following steps: providing a metal substrate; stamping the metal substrate to form a shell outer frame, the shell outer frame having a bonding surface; performing mechanical surface treatment and chemical microporous etching on the bonding surface; and die-casting an inner frame metal on the bonding surface to obtain the composite metal shell. The present application stamps a metal substrate to form a shell outer frame having a three-dimensional shape, the shell outer frame having a bonding surface, and performs mechanical surface treatment and chemical microporous etching on the bonding surface to reduce the thickness of the shell outer frame and increase the bonding force between the bonding surface and the inner frame metal, so that the prepared composite metal shell has good tensile strength and shear strength at the bonding surface between the shell outer frame and the inner frame metal.

The invention relates to an electric arc additive design-simulation-reinforcement-construction integration method for a curved metal thin shell, which comprises the following steps of: adopting a metal wire, and obtaining a three-dimensional structure model of a metal thin shell structure by utilizing the curved surface shape optimization design of a shell unit; simulating and predicting the deposition of the exposed thin shell structure; simulating and predicting the deposition of the reinforced thin-shell structure; and reinforcing thin-shell metal 3D printing construction. The method has the beneficial effects that the stress and deformation distribution and amplitude of the exposed thin shell structure are obtained through deposition simulation prediction with low cost, and reinforcement measures are set based on the stress and deformation distribution and amplitude, so that excessive deformation in the printing process of the electric arc additive process is avoided to a great extent, and the service life of the electric arc additive process is prolonged. Printing failure and printing repositioning caused by excessive deformation are avoided, and the forming quality and the material performance of the metal forming structural part are effectively guaranteed.

The present application relates to a kind of large section deep soft rock tunnel combined support system and construction method, the present application is combined with elastic shell theory and equivalent section method, a steel arch frame-grating combined support mode suitable for deep large section soft rock tunnel is proposed, the support rigidity of simply using steel arch frame or grid steel frame is overcome or supported, the disadvantage of lower in long-term large deformation unfavorable surrounding rock stability and deformation control, solve the problem that the stress of existing support structure is larger, the self-bearing capacity of surrounding rock cannot be fully exerted, cause material waste is serious, the safety factor of support structure is low, difficult to guarantee the stability of tunnel, and provide a simple and practical construction method for tunnel excavation and support.

The present invention belongs to the field of forestry technology, and in particular to a device and method for applying trace elements to thin-shell pecan rods. In view of the inconvenience in the operation of scoring longitudinal marks and applying trace elements, the staff is required to score longitudinal marks one by one and apply trace elements one by one, which is cumbersome and affects the efficiency of the thin-shell pecan rod fertilization. The following scheme is proposed, including a mounting frame seat, wherein the top and bottom of the mounting frame seat are provided with three movable openings, and the same rod fertilization module is arranged inside the multiple movable openings. The device and method for applying trace elements to thin-shell pecan rods disclosed by the present invention have the function of increasing the operating efficiency of the thin-shell pecan rod coating. When in use, the device can automatically score longitudinal marks and perform subsequent trace element fertilizer fertilization operations without the need for the staff to operate one by one, which increases the convenience of the device when in use and improves the use effect of the device.

The invention discloses a welding process device and method for a gate of a side wall thin-wall frame structure of a motor train unit project. The welding process device comprises a bottom support supported at the bottom of the device. The side wall upper edge clamping assembly is arranged on the upper portion of the bottom support and used for clamping and fixing the upper edge of a side wall. The cross beam clamping assembly is arranged at the upper part of the bottom bracket and is used for positioning and fixing an upper edge and a door frame cross beam; a water storage and slow cooling structure is arranged between the side wall upper edge clamping assembly and the upper edge of the side wall, the specific heat capacity of a medium filled in the water storage and slow cooling structure is larger than that of a body material of the water storage and slow cooling structure, and the thermal conductivity of the water storage and slow cooling structure is smaller than that of the body material of the water storage and slow cooling structure. According to the process device and method, welding deformation can be effectively controlled, the welding quality and the production efficiency are improved, and good application prospects and popularization value are achieved.

The utility model relates to the technical field of batteries, and provides a shell for a battery, which is characterized by comprising a plurality of side walls formed by bending plates, a battery accommodating cavity is defined by the plurality of side walls, and the battery accommodating cavity is suitable for accommodating a battery main body; the plurality of side walls comprise a first side wall formed by bending the head end of the plate and a connecting side wall formed by bending the tail end of the plate; and the connecting side wall and the first side wall are welded to form a welding seam so as to form a large surface of the shell. A strategy of transferring a shell welding seam to a large surface is adopted, so that the influence of shell deformation caused by welding stress on a subsequent shell cover welding procedure during shell manufacturing is reduced; gap transfer caused by size fluctuation of supplied materials is evenly distributed to the whole welding seam, the assembling difficulty of a thin shell can be effectively overcome, the welding yield of the thin shell is improved, meanwhile, the structure of the boss of the cover plate is changed, spreading of a molten pool during shell cover welding is facilitated, the air tightness of the welding seam is improved, and then the overall strength and air tightness of the battery shell are improved.

The embodiment of the invention provides a shell, a preparation method of the shell and electronic equipment. The technical problem that the thickness of the shell of the electronic equipment is large is solved. The shell comprises flexible leather, a glass fiber structure and an identification structure. The flexible leather is provided with an avoiding hole, and the avoiding hole penetrates through the flexible leather in the first direction. The glass fiber structure and the flexible leather are arranged in a stacked mode in the first direction, and the glass fiber structure makes contact with and adheres to the flexible leather. The identification structure comprises a base part and a protruding part, the base part is embedded into the glass fiber structure, at least part of the protruding part extends into the receding hole, the orthographic projection of the protruding part on the reference face is located in the outer contour of the orthographic projection of the base part on the reference face, the base part and the flexible leather are overlapped in the first direction, and the reference face is perpendicular to the first direction. Through the arrangement, the flexible skin and the glass fiber structure are in direct contact and are bonded, so that the thickness of the shell is reduced, and the shell is light and thin.

The invention discloses a superstructure shell device for reducing noise radiation, which comprises an outer shell and an inner shell, and is characterized in that the outer shell and the inner shell are of a thin shell structure which is coaxially arranged; and one or more annular noise reduction devices, wherein the annular noise reduction devices are arranged between the outer layer shell and the inner layer shell. The connecting device is used for coaxially and fixedly connecting the outer-layer shell, the annular noise reduction device and the inner-layer shell; wherein each annular noise reduction device comprises an integrated circular ring frame and at least one closed particle damping cavity, the circular ring frame comprises a plurality of torsion structure cavities and connecting rods in the annular direction, the torsion structure cavities and the connecting rods are periodically arranged in the annular direction, and the torsion structure cavities and the connecting rods form periodic structure units in a plane; the particle damping cavity is defined by a cover plate and the torsion structure cavity, and the particle damping cavity is filled with spherical particles.

The utility model discloses processing equipment for a luggage with a light and thin shell and belongs to the technical field of luggage punching, the processing equipment for the luggage with the light and thin shell comprises a rack, a fixing plate, a lifting device and a punching device, the outer end of the rack is provided with a roller way assembly, and a plurality of limiting assemblies used for forming rotation resistance are installed in the roller way assembly; a pressing and holding assembly used for extruding and fixing the luggage is arranged at the bottom end of the punching device, when a drill bit moves downwards to conduct drilling, an abutting disc of the drill bit makes contact with the surface of the luggage for limiting firstly, then a limiting block abuts against the interior of a limiting hole through the acting force provided by a plurality of second springs, and therefore resistance is formed for rotation of a roller shaft; according to the luggage punching device, the roller way assembly is arranged, so that the luggage is not prone to moving on the roller way assembly, secondary limiting is formed, the luggage is fixed, the punching quality is improved, meanwhile, additional fixing operation is not needed during punching, the pressing assembly and the roller way assembly are automatically matched, and therefore the machining efficiency can be improved.

This invention discloses a pre-defined fracture-type pile tip deformation monitoring device, construction method, and monitoring method for driven steel pipe piles. The monitoring device includes a transmission mechanism and a fracture sensor installed at the bottom of the driven pile. The fracture sensor includes a sensing wire, multiple thick shells, and multiple thin shells, which are alternately distributed and connected end-to-end to form a circular portion that matches the inner wall of the driven pile. Each thick shell has a first through hole and a second through hole at its two ends. A resistor is embedded in each thin shell. The sensing wire is connected to both ends of the resistor through the first and second through holes to form independent circuits. All independent circuits are connected in parallel and to the transmission mechanism through corresponding armored wires. This invention has advantages such as economy, convenience, sensitivity, and accuracy. It is suitable for steel pipe pile construction under various geological conditions, effectively improving project quality and reducing engineering risks caused by pile tip deformation.

This invention relates to a high-precision, cost-effective method for manufacturing open, curved integral thin-shell shells, belonging to the field of advanced manufacturing. It solves the problem that existing methods struggle to simultaneously achieve low cost, high efficiency, and high precision when manufacturing open, curved integral thin-shell shells. The method includes the following steps: S1, establishing a theoretical model of the thin-shell; S2, performing finite element simulation of subsequent assembly processes on the thin-shell; S3, performing finite element simulation of the mold during heating; S4, digitally unfolding the reconstructed thin-shell model to obtain an accurate planar unfolded model of the thin-shell. This invention, through multiple key steps such as thin-shell reconstruction, mold reconstruction and / or differential temperature design, and conversion of the three-dimensional thin-shell model into a planar unfolded model, can effectively improve the manufacturing efficiency of thin-shell shells, shortening the processing cycle by more than 75%; reducing costs by more than 80%; and improving the precision of thin-shell manufacturing, with product surface accuracy reaching the order of 0.3mm / 1000mm.

This invention relates to the field of aqueduct construction technology, and discloses a method for on-site construction of a U-shaped aqueduct body based on a self-propelled trenching machine, as well as the self-propelled trenching machine itself. It aims to solve the technical problems of poor structural adaptability, insufficient construction stability, difficulty in precision control under complex working conditions, and inefficient construction organization when using conventional bridge mobile formwork for the construction of large-span U-shaped thin-shell aqueducts in the prior art. The invention includes the following steps: S1. Equipment assembly and anti-overturning reinforcement; S2. Pre-stressing and positioning of the formwork structure; S3. Installation of reinforcing steel and prestressed structure; S4. Positioning of the inner formwork anti-buoyancy structure; S5. Concrete pouring and curing; S6. Prestressing tensioning and grouting; S7. Equipment demolding and longitudinal movement through holes; S8. Formwork closing and cyclic construction. The self-propelled trenching machine of this invention, by setting a horizontally opening and closing lower hanging beam and a foldable hydraulic inner formwork structure, enables the formwork to accurately adapt to the complex hyperboloid contour and ultra-large width of the U-shaped aqueduct, solving the structural adaptability problem of conventional formwork.

The present application relates to concrete vibration technology field, disclose a thin shell concrete structure through type vibrating device. A plurality of pairs of fixed blocks are arranged on the two side forms of the concrete, the middle part of the vibrating rod is embedded into the concrete through the rotating holes on the two side fixed blocks, then the vibration unit is used to generate vibration, the vibration is transmitted to the vibrating rod embedded in the concrete, so as to vibrate the concrete; after the vibrating operation is completed, the vibrating rod protruding out of the surface of the concrete is cut and subjected to rust-proof treatment. A flexible shaft is arranged in the transmission device, and the flexible shaft is used to reduce the vibration transmitted by the vibration unit to the driving unit. Based on the above measures, a plurality of vibrating rods penetrating through the two side forms of the concrete are arranged in the concrete at a horizontal interval, the vibrating of the thin shell concrete structure is realized, and the problem of difficult vibration of the thin shell concrete structure is solved; in addition, the flexible shaft is arranged in the transmission system, the vibration is reduced to the driving unit, which is conducive to the operation of the workers, and the energy loss is also reduced.

A rat and mouse fixing device is used for meeting the requirement for fixing an operation model animal with a device on the back, improving the comfort degree of fixing an experimental mouse, reducing animal stress, prolonging the service life of the model animal, improving the test operation efficiency and enabling test data to be more accurate. Which comprises a cylinder capable of containing a laboratory mouse, a conical thin shell is fixedly arranged at the front end of the cylinder, and vent holes are formed in the shell wall of the conical thin shell at intervals, and is characterized in that an annular groove which annularly extends from the top to the two sides by a certain arc length is formed in the front portion of the cylinder, and a longitudinal groove which longitudinally extends forwards from the rear end is formed in the top of the cylinder; the annular groove and the longitudinal groove are communicated to form a T-shaped groove; and a mouse blocking mechanism capable of moving along the longitudinal groove is arranged at the rear part of the cylinder.

The application discloses a protective living structure convenient to transport and deploy, and belongs to the technical field of buildings, comprising an air cushion type living cabin and an inflatable shell covering the outer surface of the air cushion type living cabin, a protective filling layer is arranged between the inflatable shell and the air cushion type living cabin, and a filling opening for filling protective material into the protective filling layer is arranged on the inflatable shell. Compared with the prior art, the application can overcome the contradiction between the construction requirements of large size and multiple functions and the limited volume of the load cabin of the carrier in the existing habitat construction scheme, and solve the problems that loose protective material is difficult to self-support and form, the geometric shape of the protective layer is difficult to maintain, and the utilization efficiency of the protective material is low.

The present invention discloses a pivot structure for a thin-shell earphone charging box, comprising a cover and a box pivotally connected to each other. The pivot mechanism comprises a first pivot member, a second pivot member, a pivot, and a reinforcing plate. The cover connecting portion of the first pivot member is fixedly installed between the outer cover and the inner cover, and the upper pivot portion extends downward from the cover to the pivot notch; the box connecting portion of the second pivot member is fixedly installed between the outer box and the inner box, and the lower pivot portion extends upward from the box body to the pivot notch, and the lower pivot portion is pivotally connected to the upper pivot portion via a pivot; the reinforcing plate is fixed between the outer box and the inner box, and its plug-in plate is upwardly inserted into the lower slot provided on the box connecting portion. In response to the problem that the shell of the double-layer composite structure earphone charging box is relatively thin, the present invention adds a reinforcing plate to the pivot mechanism. The reinforcing plate is usually made of a metal plate and provides a strength support between the pivot structure and the shell of the charging box, which can effectively improve the problem of insufficient strength of the thin-shell charging box.

The invention relates to the technical field of bridge swivel, and provides a thin shell casting type swivel spherical hinge and a mounting construction method. The thin shell casting type swivel spherical hinge comprises an upper spherical hinge body, a lower spherical hinge body and a lower spherical hinge body, the upper spherical hinge body is of a cavity thin shell structure which is integrally cast and formed, and the thickness of the upper spherical hinge body ranges from 40 mm to 120 mm; the lower spherical hinge is arranged below the upper spherical hinge, the lower spherical hinge is of a cavity thin shell structure which is integrally cast and formed, the thickness of the lower spherical hinge is 40-120mm, and a plurality of material injection holes, vibration holes and exhaust holes are formed in the top of a spherical panel of the lower spherical hinge; and the multiple friction sliding sheets are circumferentially distributed between the upper spherical hinge and the lower spherical hinge. Compared with the prior art, the thin-shell casting type swivel spherical hinge has the advantages that on the basis that the swivel spherical hinge meets the requirements for structural strength and rigidity, the compactness of concrete on the lower portion is effectively improved, and meanwhile the structural weight can be greatly reduced.

The invention relates to the field of material recovery, in particular to a crushing device for thin shells of particles with Mohs hardness of 9.5 grade. According to the crushing principle, the shells of hard particles are crushed by means of instantaneous shear force between a movable grinding head and a static grinding head, the device mainly comprises the movable grinding head, the static grinding head, a feeding port and a discharging port, the static grinding head is arranged below the movable grinding head, and the discharging port is arranged below the static grinding head. A particle channel is arranged between the movable grinding head and the static grinding head, one end of the particle channel is connected with the feed port through a pipeline, and the other end of the particle channel is connected with the discharge port through a pipeline; cutting grooves are formed in the dynamic grinding head and the static grinding head, the positions of the cutting grooves of the dynamic grinding head and the static grinding head are opposite, and the dynamic grinding head and the static grinding head crush particles through shearing. Through the design of the movable grinding head and the static grinding head, the abrasion degree of a traditional crushing device during crushing of thin-shell materials with the Mohs hardness of 9.5 level is reduced. By changing the material channel gap between the movable grinding head and the static grinding head, the crushing fineness of particle thin shells with the Mohs hardness of 9.5 grade can be controlled and adjusted.

The present application relates to the technical field of prefabricated buildings, and provides a movable mold system for ribbed thin-shell stairs and a method for producing prefabricated stairs. The movable mold system for ribbed thin-shell stairs comprises a supporting base, a first mold, a second mold and a driving assembly arranged on the supporting base; the first mold comprises a first mold body; the second mold comprises a second mold body and a rib mold; the driving assembly comprises a first telescopic driving device, a second telescopic driving device and a third telescopic driving device, the first telescopic driving device is connected to the second mold body to drive the second mold body to move, the second telescopic driving device is installed on the side of the second mold body corresponding to the rib mold, one end of the third telescopic driving device is connected to the rib mold, and the other end is connected to the second mold body. The system automatically and accurately controls the action of the driving assembly to realize mold closing and demolding operations, reduces the difficulty of demolding, prolongs the life of the mold, and improves the production accuracy and efficiency.

This invention discloses a hollow structure Go piece, belonging to the technical field of chess products. The invention includes a Go piece body, which consists of a shell, a hollow area, and internal supports. The Go piece body adopts a thin-shell structure design, with hollow areas on the shell and internal supports arranged in the non-hollow areas. Specifically, the pentagram series hollow Go pieces use a fully supported structure, while the snowflake series hollow Go pieces feature a combination of columnar and radial support structures. This invention optimizes the layout of the hollow areas and internal supports through topological modeling, significantly reducing weight, achieving a lightweight Go set, and facilitating portability while effectively ensuring the structural strength and durability of the Go pieces. This invention relies on structural optimization to precisely control the center of gravity of the Go pieces, ensuring a high degree of consistency in the center of gravity of each piece through refined structural proportions, effectively improving placement stability and game feel. This invention features a novel structure, diverse shapes, and strong practicality, effectively solving the technical problems of traditional solid Go pieces, such as heavy weight, inconvenience in carrying, difficulty in accurately controlling the center of gravity, and poor consistency.

The utility model provides a thin-shell workpiece clamping tool which comprises a bottom plate, a positioning piece, a plurality of limiting pieces and a clamping unit, the limiting pieces are arranged on one end face of the bottom plate in the circumferential direction of a thin-shell workpiece so as to define an installation space for containing the thin-shell workpiece, and the clamping unit is arranged on the other end face of the bottom plate. The positioning piece is arranged on the bottom plate and provided with a positioning column penetrating through a positioning hole in a thin shell workpiece, the clamping unit comprises a pressing element and a supporting element, the pressing element comprises a pressing part, the supporting element comprises a supporting part, and the supporting part is arranged on the pressing part. The pressing part and / or the supporting part can be driven to move in the opposite direction or in the back-to-back direction so that an adjustable clamping space can be formed between the pressing part and the supporting part, and the clamping space is used for clamping a thin shell workpiece. The thin shell workpiece clamping tool solves the problems that when the thin shell workpiece clamping tool is used for clamping a workpiece, local stress concentration is easily caused in the pressing process, and deformation and even breakage are caused.

A hydroforming method for an ellipsoidal container under combined hydrostatic load and rotational load, the method comprising: Step 1, determination of an initial lantern-shaped single-curvature thin shell member: Select an appropriate segmenting scheme; determine the size of the pole plate and fabricate the initial single-curvature thin shell; Step 2, fix the initial single-curvature thin shell using a fixture, and fix near the weld with relatively small displacement between the fixture and the thin shell during the bulging process and achieve soft contact by relying on a jacket, so as to drive the ellipsoidal shell to rotate and reduce the limitation on deformation during the rotational bulging of the ellipsoid; Step 3, rotate the fixture and gradually increase the rotational speed, and increase the hydrostatic pressure during the process of increasing the rotational speed, ensure that the hydrostatic pressure and the rotational pressure increase linearly synchronously, and after the loading reaches the total load, keep it stable for a certain time to make it fully deformed and then unload to obtain the bulged ellipsoidal container. The present invention realizes the forming of an ellipsoidal shell structure with a high axial length ratio by changing the stress state of the spherical shell using a non-uniformly distributed hydraulic load.