88 results about "Skin stretching" patented technology

The invention discloses a vibration-assisted aircraft skin stretch forming and resilience inhibition device and technique. The device is characterized in that the following components are included: a mould, a vibration exciter, a cushion, a stretching device, a workbench, a fixed part; the vibration exciters are symmetrically fixed inside both sides of the mould, and the mould is provided with a cushion underneath. During stretch forming, stretching motion and vibration of the vibration exciter function synchronously; the control system starts the vibration exciter, and drives the mould to vibrate at a low frequency, till the forming process is finished. After stretch forming is finished, the vibration exciter drives the mould and the formed aircraft skin to vibrate at a high frequency to prevent the resilience of the aircraft skin. The aircraft skin stretch forming and resilience inhibition device and technique can ensure the sufficient deformation of sheet bars, and prevent resilience of the aircraft skin, thereby improving the forming quality.

The invention provides an annular skin stretching device, comprising a stretching line, a rod body, a hollow pipe, and retaining clips which can slide relative to the rod body. A wound surface skin is continuously sutured by the stretching line. After suture, the tail ends of two sides of the stretching line intersect and pass through the hollow pipe, and the tail ends of two sides of the stretching line are respectively tensioned on the retaining clips on the corresponding sides. The retaining clips move a certain distance towards the corresponding ends of the rod body, so under the action of the stretching line, the skin around the wound surface is stretched to a certain degree to the center of the wound surface, and then the retaining clips are fixed on the rod body, to keep stretching. The skin around the wound surface continuously tightens toward the center of the wound surface under the action of the stretching line, so as to gradually reduce the wound surface. The device is simple, light and handy in structure, and has little influence on motion of a patient. The device is suitable to be used in irregular skin defects, and can reduce economical burden of the patient.

The invention relates to a method for designing loading trajectory of airplane skin lengthwise stretch forming and generating numerical control codes based on ACB FEL serial numerical control lengthwise stretcher, comprising two steps: a first step: (1) designing the loading trajectory of lengthwise stretch forming and computing initial hole site; (2) initializing clamping and prestretching; (3) computing deflection angle; (4) computing jaw; and (5) searching for the excursion of the reference point of a mediate subsidiary clamp; and a second step: (1) inverse solving mechanism position and analyzing mechanism; and (2) movement evaluating. The method designs space motion location of the mediate subsidiary clamp, converts the loading trajectory into the numerical control of a device by the inverse solution, and computes the other space attitude parameter of each clamp according to the geometric characteristics of components, thereby, improving design efficiency and accuracy of stretch forming technological parameter. Optimally compared with the traditional method, the invention can obtain optimal produce technological process program, and realize scientific, numeralization and controllability of the airplane skin stretch forming. The invention has wide utility value and application prospect.

The invention provides a skin stretch-forming method with a transition sectional face of a flexible multipoint mould. The method includes the following steps of step1, the appearance of an intermediate transition skin is calculated; step2, a data model of initial sectional face of an intermediate transition mould is formed; step3, skin stretch forming is carried out to form an intermediate transition skin (4); step4, a next intermediate transition mould sectional face or a final transition mould sectional face is designed; step5, step3 and step4 are repeated in sequence until the final skin (4) is formed. According to the skin stretch-forming method with the transition sectional face of the flexible multipoint mould, a plurality of scattered punch bars with adjustable heights are used for fitting the three-dimensional sectional face of the mould, and therefore forming requirements of parts with different sectional faces are met.

The invention provides a rapid design method of a personalized bone plate with a controllable fitting degree. The method comprises the steps that firstly, three-dimensional reconstruction is carried out on a bone of a patient, and according to design requirements and needs, a parameter panel which is matched with the three-dimensional model and the area range of the to-be-fixed bone plate on the three-dimensional model is generated; the parameter panel is subjected to skin stretching operation towards the three-dimensional model, and a shaping panel which is attached to the surface appearance of the three-dimensional model is formed, wherein the shaping panel can completely cover the area range of the to-be-fixed bone plate on the three-dimensional model; cutting, thickening and other shaping and adjusting treatment are carried out on the shaping panel, and a bone plate model with a certain thickness and shape is generated. Subsequently, existing machining and manufacturing equipment and technologies, such as a multi-axis numerical control machine tool and the additive manufacturing technology, can be utilized, and the personalized bone plate is prepared. The bone plate prepared according to the design is controllable in fitting degree, good in adaptability and safe to use, and has the advantages of being long in service life and the like.

The invention discloses a simple skin stretching device. The skin stretching device comprises a pair of insertion needles and a pair of closing-up devices and is characterized in that the insertion needles can be inserted into the skin, and the closing-up devices can close up the insertion needles; each closing-up device comprises a screw rod, a pair of stretching blocks and rotating handles, oneof the stretching block is fixed at one end of the screw rod, the other stretching block sleeves the middle of the screw rod, and the rotating handles are rotatably connected to the other end of the screw rod; the two insertion needles are inserted into the two stretching blocks at the same positions of the two closing-up devices; The skin stretching device has the advantages that the skin stretching device is compact in structure and convenient to use; when the skin stretching device is applied to skin stretching surgery, the device can fast and effectively shrink skin defects and reduce or heal wounds; in addition, the skin stretching device is low in cost, easy to manufacture, few in complications and capable of relieving pain.

The illustrative embodiment is a simulation system that provides realistic training and practice for vascular-access procedures without using human subjects. The simulator includes a data-processing system and a haptics interface device. The haptics device provides the physical interface for performing vascular-access procedures by manipulating a needle/catheter module to simulate needle insertion, etc. Some embodiments of the system include a palpation module, a skin-stretch module, or both. The palpation module provides an ability to practice palpation and occlusion techniques, while the skin-stretch module provides an ability to practice a skin-stretch technique.

The invention provides a buckle type skin stretching device and a skin stretching method. The device comprises a fixing member, a fixed stretching member and a suture buckle, wherein the fixing membercomprises a fixing-end main body, a plurality of soft tissue fixing needles are connected below the fixing-end main body, and a traction suture is arranged at the intersection of the soft tissue fixing needles. The fixed stretching member comprises a fixed-stretching-end main body, a sealing fixing piece and a guiding noose, wherein the upper portion of the interior of the fixed-stretching-end main body is provided with a cavity accommodating the sealing fixing piece; the lower end of the cavity is connected with a plurality of intradermal fixing needles; the sealing fixing piece is internally provided with a long hole through which the guiding noose penetrates; the upper portion of the fixed-stretching-end main body is provided with a round hole from which the guiding noose stretches out. The suture buckle comprises a handle and a suture buckle ring, and the tail end of the handle is connected with the front end of the suture buckle ring. The buckle type skin stretching device has the advantages that a wound surface is quickly closed, complications are reduced, all skin organs and corresponding functions thereof are reserved, and the device is easy to operate without damaging other healthy skin tissue and can be matched with a VSD device for use, reduce discomfort of patients and increase the recovery speed.

The invention discloses a preparation method of a graphene material based on a surface microstructure flexible substrate, provides a dual-channel flexible polymorphic stress sensor structure, which relates to a flexible polymorphic stress sensor structure and preparation. The sensor comprises upper and lower flexible substrates, upper and lower sensitive layers, upper and lower electrode layers and a packaging structure. The lower flexible substrate and the lower sensitive layer are a PDMS substrate subjected to surface microstructuring treatment and a graphene film formed on the surface of the PDMS substrate, and the lower flexible substrate and the lower sensitive layer are prepared through PDMS reverse molding and graphene brushing. The upper electrode layer comprises a silver electrode C and an electrode leading-out end thereof, and the lower electrode comprises silver electrodes A and B and electrode leading-out ends thereof. The prepared dual-channel sensor is used for realizing simultaneous detection of pressure and stress signals, and distinguishing and judging of human body actions under complex strain conditions such as joint bending, external force pressing and skin stretching can be realized. Meanwhile, the graphene material based on the surface microstructure flexible substrate is adopted, so that the stress detection range adapted to the sensor is optimized, and the sensor can work normally when human joints move freely.

A self adjusting flap is disclosed. The self adjusting flap comprises a solid body including a hinge. The flap includes a flexible skin stretched across an array of equi-spaced ridges on a convex surface of the hinged solid body, such that lift and drag forces due to fluid flow across it causes the flap to rotate about the hinge and automatically orient itself to minimize flow losses through turbulence while shielding objects downstream from flow induced drag.

The present invention discloses a set of equipment which comprises an extended and biologically compatible flexible support plate. The support plate comprises the following components: at least a series of holes which extend from a bottom part to a top part and are basically positioned adjacently with a first relative edge and a second relative edge of the support plate; a bent surface which extends from a surface of a base part of the support plate to the top part; a propulsion extension part which is basically positioned at a center line of the bent surface; and a releasable locking mechanism which is positioned along a vertical axis of the bent surface adjacently with the extension part. Therefore, the releasable fixing mechanism which positions first equipment and second equipment for contacting with the skin at the edge or adjacent part of opposite wounds and inserts the propulsion extension part of the first equipment into the second equipment facilitates skin extension, wound edge approaching, wound closing or combination thereof. The invention also discloses a method for promoting skin extension, wound edge approaching or wound closing in an object, and an external member which comprises wound closing equipment and at least one propulsion extension part.

The invention belongs to the technical field of technological equipment designing and manufacturing, and particularly relates to a skin stretch forming die and a manufacturing method thereof. The skinstretch forming die comprises a wooden structure frame, an epoxy resin-talcum powder surface and an epoxy resin-glass bead filling body; and the wooden structure frame is arranged at the periphery and the bottom face of the skin stretch forming die, the epoxy resin-talcum powder surface is arranged on the top face of the skin stretch forming die, the wooden structure frame and the epoxy resin-talcum powder surface form a hollow space, and the hollow space is filled with the epoxy resin-glass bead filling body. According to the skin stretch forming die and a manufacturing method thereof, the technological operation processes are simple, filling material sources are wide, the relative cost is low, the relative weight is low, and machining and using are convenient in the skin part stretch forming process.