14results about How to "Increase binding area" patented technology

The utility model discloses a kind of lead frame structures, lead frame unit is arranged to form the lead frame structure in six rows, left and right two columns, the lead frame unit includes: base island, including base island body and protruding setting in the front of base island body chip bearing area;Locking groove, be opened in the chip bearing area, and the locking groove is located at the edge position of the chip bearing area;Pin, bending connection in the side of the base island;Base island connecting rib, connect between two the base island of adjacent upper and lower;Wherein, the chip bearing area is rough surface. Solve the problem that the base island and chip of existing TO-252 lead frame are easy to delaminate.

The utility model discloses a DFN2510 anti-layering frame, which comprises a DFN2510 frame and connecting ribs formed at the edge of the DFN2510 frame, a step structure is formed at the edge of the long side of the DFN2510 frame, one end of the step structure is connected with the edge of the hollow part on the DFN2510 frame, and the other end of the step structure extends to a connecting rib opening in the middle of the long side of the DFN2510 frame; the pair of step structures is symmetrically arranged on the two sides of the rib connecting opening, so that the rib connecting opening forms a narrowed rib connecting opening through the pair of step structures. The utility model relates to the technical field of semiconductor packaging, and can solve the problem that in the prior art, a DFN2510 frame and an insulating medium layer may have a layering defect during forming and cutting.

This invention discloses a welding method for fabricating a three-dimensional reinforced steel / aluminum welded joint on a steel surface, belonging to the field of dissimilar metal welding technology. This invention employs laser selective melting to fabricate a three-dimensional geometric structure on the surface of a steel substrate, forming a surface with a high aspect ratio and high specific surface area. By using brazing or fusion brazing methods, the bonding area between the liquid aluminum and the steel plate and the three-dimensional geometric structure is greatly increased, effectively suppressing crack propagation and achieving a dual enhancement of the strength and toughness of the steel / aluminum dissimilar metal joint. This method increases the specific surface area of ​​the steel / aluminum joint interface, improving sliding resistance under external loads, while the three-dimensional geometric structure itself bears some of the stress. Simultaneously, the three-dimensional geometric interface structure can alleviate joint interface stress and improve stress distribution, which is beneficial for obtaining a welded joint with good performance.

The utility model discloses a sound production unit, which comprises a voice coil and a framework, the framework is provided with a connecting surface used for being bonded with the voice coil, and the connecting surface is provided with a glue containing groove. In the sound production unit, the connecting surface, used for bonding the voice coil, of the framework is provided with the glue containing groove, and the glue containing groove can store glue and is favorable for increasing the bonding area of the voice coil and the framework, so that the bonding strength of the voice coil and the framework is improved, and the structural stability of the sound production unit is improved.

The utility model relates to a kind of composite lining for semi-autogenous mill and ball mill, including first lining body, second lining body and metal ceramic block, first lining body includes boss and transition zone;First lining body is used for semi-autogenous mill;Second lining body includes boss, transition zone and bottom plate, bottom plate is between two bosses;Second lining body is used for ball mill;Metal ceramic block is evenly distributed in the working surface of first lining body and second lining body;Metal ceramic block is provided with through hole, and metal liquid of boss, transition zone and bottom plate is fused into an organic whole with metal ceramic block by through hole.The utility model hole makes metal liquid infiltrate into the inside of metal ceramic block when casting, forms "metal anchor nail" structure after cooling and solidification, provides pullout resistance perpendicular to interface for metal ceramic block, effectively prevents metal ceramic block from transverse slip or drop under impact load.

The utility model discloses a separation type facial mask bag which comprises a bag body, a liquid cavity and a facial mask cavity are arranged in the bag body, a first easy-to-uncover strip and a second easy-to-uncover strip are arranged on the two sides of the interior of the bag body between the liquid cavity and the facial mask cavity respectively, and the first easy-to-uncover strip and the second easy-to-uncover strip are attached in a separable mode through hot melt adhesive. The first easy-to-tear strip and the second easy-to-tear strip are provided with transverse embossments, and vertical embossments are arranged at the two ends of the transverse embossments and form locking edges. A clamping block is arranged on the top face of the first easy-to-tear strip, and a connecting groove matched with the clamping block is formed in the top face of the second easy-to-tear strip.

A method for laser welding of titanium / aluminum using coaxial airflow and pre-placed powder-assisted welding comprises the following steps: S1, machining a powder-filling groove on the surface of the aluminum alloy workpiece to be welded; S2, grinding and cleaning the surfaces of the titanium alloy workpiece to be welded and the machined aluminum alloy workpiece; S3, filling the powder-filling groove with pre-prepared metal powder, wherein the pre-prepared metal powder is pure Zr powder, pure V powder, or pure Nb powder; S4, lapping the aluminum alloy workpiece and titanium alloy workpiece to be welded with the titanium alloy workpiece on top and the aluminum alloy workpiece on the bottom to form a lap joint assembly, fixing it on a welding fixture, and covering it with a gas protective cover; S5, welding the assembly using a oscillating laser, during which protective gas is introduced through the gas pipe of the gas protective cover, and a pulsed coaxial protective gas flow is delivered to the welding position in real time through a coaxial gas delivery device. This invention solves the problem of difficulty in controlling the thickness of the brittle intermetallic compound layer during titanium-aluminum dissimilar metal welding.

The utility model discloses a silicon nitride ceramic heater, and relates to the technical field of ceramic heating. Comprising a ceramic laminated plate which is formed by laminating a plurality of ceramic layers, a heating circuit which is arranged between two adjacent ceramic layers and has a folded shape, a connecting circuit which is arranged between the adjacent heating circuit and the ceramic laminated plate, and a plurality of through holes which are uniformly distributed and penetrate through the heating circuit and the connecting circuit, the width of the connecting circuit is larger than that of the heating circuit, and the two ends of the connecting circuit extend to the two sides of the ceramic laminated plate; the two ends of the heating circuit extend to the two sides of the ceramic laminated plate. The heating circuit is arranged between the upper-layer ceramic laminated plate and the lower-layer ceramic laminated plate, voltage is applied to the heating circuit, flowing current is generated, electric energy is converted into heat energy, the heating circuit generates heat, and the heat is transmitted outwards through the upper-layer ceramic laminated plate and the lower-layer ceramic laminated plate. And enabling the surface of the ceramic laminated plate to reach a preset temperature.

The invention relates to the technical field of cable test detection, and discloses a cable test detection device, which comprises a base, two groups of fixed seats, a stroke measuring scale, an air cylinder, two groups of guide columns and a guide protection unit. According to the cable test detection device, the interception assembly is arranged, arc-shaped covers distributed in a circumferential array form a stable tubular protection area on the periphery of a stretching cable, it is ensured that linear motion of the stretching cable does not deflect through cooperation of a guide frame and a T-shaped block, and meanwhile movable arc-shaped plates are arranged in the arc-shaped covers; when the broken end of the cable and fragments rebound and fly under huge energy at the moment of breakage of the cable, the multi-direction arc-shaped cover structure and the movable arc-shaped plate on the opposite side jointly form a dynamic closed buffer ring, and splashing objects are intercepted and restrained in a limited protection space. The safety risk problems that an existing test device easily causes personal injury to operators, precision measurement equipment is damaged by collision and data accuracy is interfered are solved.

This utility model provides an FPC gold finger reinforcement device to prevent solder pad detachment, comprising: a substrate and multiple gold finger bodies, further comprising: a support structure, wherein the support structure is installed between each two adjacent solder pad bodies; a protective structure, wherein the protective structure is sleeved on one end of the substrate and the gold finger bodies; and an anti-bending structure, wherein the anti-bending structure is provided between the outermost two gold finger bodies, which are far apart from each other, and the protective structure. The FPC gold finger reinforcement device provided by this utility model increases the bonding area between the solder pad bodies and the substrate through support ribs and connecting rods, thereby increasing the bonding force between the two and preventing loosening or detachment during insertion and removal. The reinforcing plates on both sides distribute the bending force, preventing wrinkles or damage to the solder pad bodies and gold finger bodies after being stretched, which would affect the performance and subsequent use.

The application discloses a preparation method of an electromagnetic shielding layer, the electromagnetic shielding layer and a display module, and relates to the technical field of display modules. The preparation method of the electromagnetic shielding layer comprises the following steps: forming a corrosion grain boundary layer on a first surface of a metal layer; and forming an organic material layer on the first surface of the metal layer, and part of the organic material layer invades the corrosion grain boundary layer to form a first composite layer. In the preparation method of the electromagnetic shielding layer, the corrosion grain boundary is formed on one side of the metal layer, and part of the organic material layer invades the corrosion grain boundary layer. The first composite layer improves the bonding area and the bonding strength between the organic material layer and the metal layer, improves the adhesion between the organic material layer and the metal layer, and helps to improve the rigidity of the overall structure of the electromagnetic shielding layer. Meanwhile, after the organic material invades the metal grain boundary, the organic material layer and the metal layer form an interlocking structure, the first composite layer can disperse impact force and reduce stress concentration, thereby preventing local damage of the metal layer.

The utility model relates to circuit board technical field, concretely relates to a leadless welding joint reinforced circuit board, including casing, circuit board main part, pin and buffer mechanism, circuit board main part slides and installs on the casing, the pin is welded and installed on the circuit board main part through the connecting mechanism, and the buffer mechanism is used for buffering the circuit board main part, and the connecting mechanism includes cylinder and conductor post, the cylinder is fixedly installed on the circuit board main part, and the inner wall of cylinder is provided with recess, and the conductor post is fixedly installed on the pin, and the conductor post is inserted with recess, and the connecting mechanism still includes reinforcing rib, and the reinforcing rib is fixedly installed on the cylinder. The leadless welding joint reinforced circuit board, through the connecting mechanism that sets up, makes the cylinder can improve the stress distribution of welding point, and enhances the bonding area of welding point, thereby can play the reinforcing effect to the welding point of circuit board, and then improves the use effect and service life of circuit board.

The application discloses a 3D-printed implant with arc-shaped pipelines and a preparation method thereof, which is used for being implanted into an alveolar bone implantation nest of a patient, and the implant comprises a dense core body and a bone bonding part wrapped outside the dense core body; the bone bonding part comprises a first porous part and a second porous part; the first porous part is connected with the top surface of the second porous part; a plurality of arc-shaped pipelines are arranged in the first porous part; the arc-shaped pipelines are provided with openings at two ends and are communicated with the outside through the openings; the arc-shaped pipelines are extended into a cleaning part through the openings to clean the interiors of the arc-shaped pipelines. The interiors of the arc-shaped pipelines can load drugs (such as BMP-2, VEGF, PDGF and the like) to induce the rapid growth of bone tissues. The implant has the characteristics of good strength, matched elastic modulus of the bone bonding part and the patient and easy cleaning. The implant has a wide indication and is suitable for various edentulous patients, especially for the cases of insufficient alveolar bone mass or bone density.