34results about How to "Increased tensile and shear capacity" patented technology

The invention relates to the technical field of welding of Al / Mg dissimilar materials and specifically relates to a method for diffusion spot welding with solid phase assistance by an efficient liquidphase of Al / Mg dissimilar metal. The method provided by the invention comprises the steps that an Al plate and an Mg plate are rubbed by a friction head to generate heat, a metal foil between the plates is melted by the heat, and an oxidation film on a contact face is cleaned by the molten metal obtained after melting; the liquid metal is then extruded out through extrusion of the friction head;and during maintenance of close adhesion between the Al plate and the Mg plate, atomic diffusion takes place on the cleaned contact face, so diffusion spot welding connection is formed. A welding connector obtained through utilization of the method provided by the invention is a solid diffusion welding head, and a key hole in a welding spot surface is eliminated, so an effective bearing area of the connector is significantly increased; resistance of the spot welding connector to tensile and shear is enhanced; and complicated mechanical equipment and subsequent processes of repair welding are omitted.

The invention relates to a carton production process, which comprises a film coating process, and the film coating process comprises the following steps: a1, preparing materials, namely preparing a corrugated board, a heat preservation film and an isolation film; a2, conducting film coating, specifically, the surface of the corrugated board is covered with the heat preservation film; a3, punching,specifically, glue containing grooves and glue injection holes are evenly formed in the composite corrugated board and the heat preservation film; a4, conducting glue injection, specifically, fixingglue is injected into the glue injection holes, so that the fixing glue is fixedly poured into the space between a second paperboard and the corrugated paperboard and overflows into the glue containing grooves; and a5, conducting secondary film coating, specifically, the isolation film and the surface, away from the second paperboard, of the heat preservation film are bonded and fixed, and the surface, attached to the heat preservation film, of the isolation film is bonded and fixed to the fixing glue in the glue containing grooves. According to the technology, in the step a5, the isolation film and the heat preservation film are bonded and fixed through the fixing glue in the glue containing grooves, so that the situation that the surface, close to the heat preservation film, of the isolation film is coated with the glue again is avoided, and the film coating process is simple in step and short in period.

The invention discloses a construction method of a reinforced concrete support structure of a diaphgram wall retaining foundation pit. The reinforced concrete support structure of the diaphgram wall retaining foundation pit mainly comprises an underground diaphragm wall, a underground diaphragm wall main reinforcement, a pre-buried anchor cable fixing end, a anchor cable protecting tube, an anchor cable, a straight sleeve, a reserved connecting reinforcement with mantle fibers, a cross-shaped stiffened plate with holes, a horizontal connecting reinforcement with a thread, a fiber cloth isolating film, a vertical filling agent main pipe, a horizontal filling agent main pipe, a post-installed L-shaped lower supporting plate, a post-installed Z-shaped upper fixing plate, a pre-buried PVC pipe, a supporting main reinforcement and a reinforced concrete support. The construction method comprises the steps of trenching construction, reinforcement cage manufacturing, concrete pouring, part of a diaphgram wall chiseling off, crown beam and reinforcement concrete support pouring, demolition blasting and the like. The construction method of the reinforced concrete support structure of the diaphgram wall retaining foundation pit has the advantages that shear resisting strength is high, connection is convenient and quick, and steel can be recycled and reused; and the purposes of shortening the construction period and reducing construction cost are achieved.

Disclosed is a hollow box for concrete structure, which comprises an upper box board (1) and peripheral formworks (2), characterized in that the peripheral formworks (2) are partly or completely deformable formworks (3) through compressing deformation or / and stretch deformation. The invention can be applied to various cast-in-situ reinforced-bar concrete or prestressed reinforced-bar concrete hollow building roofings, house roofings, walls, foundation bedplates and hollow bridges, especially for hollow flat slabs.

Disclosed is a hollow box for concrete structure, which comprises an upper box board (1) and peripheral formworks (2), characterized in that the peripheral formworks (2) are partly or completely deformable formworks (3) through compressing deformation or / and stretch deformation. The invention can be applied to various cast-in-situ reinforced-bar concrete or prestressed reinforced-bar concrete hollow building roofings, house roofings, walls, foundation bedplates and hollow bridges, especially for hollow flat slabs.

A method for synchronously realizing friction stir spot welding-brazing-diffusion welding of aluminum and magnesium dissimilar materials. Both sides of the blank are respectively in contact with the aluminum plate and the magnesium plate. Friction stir spot welding is performed on the fixed overlapping structure. During the welding process, on the one hand, the friction stir spot welding of the aluminum plate and the magnesium plate is realized through the action of the stirring pin on the stirring head and the plate below; Under the action of heat generated by shaft shoulder friction and forging pressure, the temperature in the area close to the stirring pin is high, the brazing sheet melts, and a brazed connection is formed between the aluminum plate and the magnesium plate; Under the action of heat, atomic diffusion occurs between aluminum plate / solder sheet and magnesium plate / solder sheet to form diffusion welding. The invention can form brazing and diffusion welding joints at the same time of friction stirring spot welding, increase the effective bearing area of ​​solder joints, and improve the tensile shear force of the joints.

Disclosed is a hollow box for concrete structure, which comprises an upper box board (1) and peripheral formworks (2), the upper box board (1) covers on the peripheral frameworks (2), the upper box board (1) and the peripheral formworks are split-and-paste prefabricated members, characterized in that the lower portion of the peripheral frameworks (2) is provided with at least a notch or hole (4).The invention can be applied to various building slabs, house roofings, walls, foundation bedplates and hollow bridges.

Disclosed is a hollow box for concrete structure, which comprises an upper box board (1) and peripheral formworks (2), characterized in that the hollow box is provided with an overhead member (3) for dangling the lower end of the peripheral framework (2). The invention can be applied to various cast-in-situ reinforced-bar concrete or prestressed reinforced-bar concrete hollow building roofings, house roofings, walls, foundation bedplates and hollow bridges, especially for hollow flat slabs.

The invention relates to an aluminum formwork structure. The aluminum formwork structure comprises a formwork face, a first side plate, a second side plate, a first reinforcing strip, a second reinforcing strip, a third reinforcing strip, a first fixing clamp, a second fixing clamp and fixing channel steel. First reinforcing angles are arranged at the two ends of the first side plate; second reinforcing angles are arranged at the two ends of the second side plate; the first reinforcing strip, the second reinforcing strip and the third reinforcing strip are all arranged on the formwork face; a first mounting groove is formed between the first reinforcing strip and the second reinforcing strip; a second mounting groove is formed between the second reinforcing strip and the third reinforcing strip; the first fixing clamp is in sliding connection with the first reinforcing strip; the second fixing clamp is fixedly connected with the third reinforcing strip; the first side plate, the first reinforcing angles, the first reinforcing strip and the formwork face form a first reinforcing frame; and the second side plate, the second reinforcing angles, the third reinforcing strip and the formwork face form a second reinforcing frame. The aluminum formwork structure can enhance the strength of an aluminum formwork.

The invention relates to a production process of a carton, which includes a film covering process, and the film covering process includes the following steps: A1. Prepare materials, prepare corrugated cardboard, thermal insulation film and isolation film; A2. Cover film, cover the surface of the corrugated cardboard with the thermal insulation film ; A3. Punching holes, evenly opening out glue grooves and glue injection holes on the composite corrugated cardboard and insulation film; A4. and overflow into the glue tank; A5. Secondary lamination, paste and fix the surface of the isolation film and the insulation film away from the second cardboard, and the surface of the isolation film attached to the insulation film is bonded with the fixed glue in the glue tank fixed. In step A5 of this process, the isolation film and the heat preservation film are bonded and fixed by the fixed glue in the glue tank, thereby avoiding the recoating of glue on the surface of the isolation film close to the heat preservation film. The steps of the film coating process are simple and the cycle is short.

The invention discloses a construction method for an underground diaphragm wall containment foundation pit steel pipe supporting structure. The underground diaphragm wall containment foundation pit steel pipe supporting structure mainly comprises an underground diaphragm wall, underground continuous wall main ribs, embedded anchor cable fixing ends, anchor cables, anchor cable protection pipes, embedded connecting sleeves, U-shaped fixing ribs, an embedded end plate, positioning steel plates, joint steel, ribbed rib plates, a supporting bracket, a batten plate, a pull rod with a hook and a steel support. The construction method mainly includes the steps of grooving construction, reinforcement cage manufacturing, concrete pouring, chiseling of a part of the underground diaphragm wall, joint connecting and the like. A connecting joint of the construction method has the beneficial effects that the shear strength is high, connecting is convenient and fast, and structural steel can be recycled and reused; and the construction method achieves the purposes that the construction period is shortened, and the construction cost is reduced.

The invention discloses an antenna structure with omnidirectional shielding, which includes a circuit board for the antenna, and the circuit board includes an insulating layer, circuit layers arranged on both sides of the insulating layer, and covering films respectively arranged on the surface of each circuit layer , also includes a shielding film, the shielding film is divided into an upper shielding film and a lower shielding film, the upper shielding film is attached to the surface of the covering film on one side, and the lower shielding film is attached to the surface of the covering film on the other side; wherein, the The shielding film comprises a protective layer, an insulating layer, a metal shielding layer and a conductive layer, the insulating layer is arranged on the surface of the protective layer, the metal shielding layer is arranged on the surface of the insulating layer, the conductive layer is arranged on the surface of the metal shielding layer, the The insulating layer is made of vinyl, and the metal shielding layer includes a first metal shielding layer formed by sputtering and a second metal shielding layer formed by electroplating. The omnidirectional shielding antenna structure provided by the invention has good electromagnetic shielding performance and stable structure.

The invention provides a device and a method for carrying out thermocompression welding on enameled wires of pendulum components. The device comprises a base and a sliding shaft, wherein the base is cylindrical, a through stepped hole is formed in the central position of the base; the aperture of a big hole at the upper part of the stepped hole is a mounting hole for the sliding shaft; a ring-shaped boss is processed on the upper surface of the base, at the outer side of the stepped hole; a ring-shaped shallow slot is processed on the outer side of the ring-shaped boss; two arc-shaped non-closed surrounding structures symmetrically distributed are processed on the outer side of the ring-shaped shallow slot, and are separated by two shallow slots with different shapes. With the special design of the device, the supporting and positioning problems of a central pendulum of a pendulum plate and a moving coil of a torquer are solved, so that the reliable positioning on the pendulum plate is realized, the stability of welding is good, and the rate of finished products and the work efficiency are also greatly improved. For the welding method, a special welding technology is adopted, the welding quality is good, the welding parameters are stable and controllable, the consistency is good, the time for welding one pendulum component by adopting lead-tin welding is about 10 minutes, while the time for welding one pendulum by adopting the method is only about 4 minutes, the production efficiency is improved by 150%, and the product pass rate also reaches above 99.5%.