32results about How to "Controlled plastic deformation" patented technology

Disclosed is a clamping device including a collar having at least one pair of projecting lugs and tightening means co-operating with said lugs. Each lug of a pair is equipped with reinforcement means suitable for opposing deformation of said lugs under the action of the tightening means. Each lug has a connection portion via which it is connected to a belt portion of the collar, which connection portion is upstanding relative to said belt portion, and a tightening wall, with which the tightening means come into engagement and which is folded back towards the belt portion. A space is formed between the connection portion and the tightening wall.

Fittings are provided for use with different types of tubing. One such fitting includes a gripping member having a sharp tube indenting edge that provides a seal between the tube gripping member and the tube. Another such fitting includes a tube gripping member having a body indenting edge that provides a seal between the tube gripping member and a fitting body.

A bracket is used to couple together a seating frame member and a back frame member of a seat of a vehicle. The bracket comprises a periphery and a central longitudinal axis dividing the bracket into a front portion and a rear portion. The front portion of the bracket defines a yield segment for plastically deforming when a force above a predetermined value is applied to the back frame member. Plastically deforming the yield segment reduces an impact force transferred from the seat to an occupant. The periphery of the rear portion of the bracket includes a first contact surface and a second contact surface spaced from the first contact surface. The first contact surface moves into contact with the second contact surface as the yield segment plastically deforms thereby restricting the plastic deformation of the yield segment.

The present invention provides a rider restricting device of a two-wheeled vehicle which is easily applicable to a small-sized vehicle and, at the same time, can absorb a frontward load and alleviate a load applied to a rider. The rider restricting device has left and right knee portion pads such that a pad support member for each mounts to a connecting member such that a load absorbing member is mounted in either the pad support member or the connecting member.

The present invention provides a rider restricting device of a two-wheeled vehicle which is easily applicable to a small-sized vehicle and, at the same time, can absorb a frontward load and alleviate a load applied to a rider.

The invention discloses a post-tensioning prestress type self-centering steel frame structure. The post-tensioning prestress type self-centering steel frame structure comprises at least one structural unit. Each structural unit comprises two steel frame columns, a T-shaped steel beam, a self-centering connecting piece and friction energy consumption parts, wherein the T-shaped steel beam is used for connecting the upper ends of the steel frame columns, the self-centering connecting piece is located on the lower side of the T-shaped steel beam and used for connecting the steel frame columns, and the friction energy consumption parts are located on the lower portion of the self-centering connecting piece. Each self-centering connecting piece comprises an inner sleeve, an outer sleeve, end plates, pretensioning rods and connectors, wherein the inner sleeve is sleeved with the outer sleeve, the end plates are located at the two ends of the sleeves, the pretensioning rods are arranged in the inner sleeve and anchored on the end plates, and the connectors are connected with the ends of the inner sleeve. Each friction energy consumption part comprises an inner friction plate, an outer friction plate and a friction gasket, wherein the inner friction plate is connected with the inner sleeve, the outer friction plate is connected with the lower side face of the outer sleeve, the friction gasket is arranged between the inner friction plate and the outer friction plate, and the sliding direction of the inner friction plate and the sliding direction of the outer friction plate are arranged in the axial direction of the outer sleeve. Column space is kept unchanged when the columns are laterally deformed, and the strength, the rigidity and the ductility of the structure can be flexibly and independently adjusted and controlled in the design process.

The invention discloses an extrusion moulding mold for branch type light alloy component with the big middle and small ends. The mold comprises an upper mold assembly, a lower mold assembly, an ejector device, a material crushing device and a valving type internal-external support component, wherein the upper mold assembly is arranged above the lower mold assembly, the valving type internal-external support component is arranged between the upper mold assembly and the lower mold assembly, the ejector device is arranged below the lower mold assembly and is in clearance fit connection with the lower mold assembly, the top end of the ejector device is in contact fit connection with the valving type internal-external support component, and the material crushing device is fixedly arranged abovethe lower mold assembly and is arranged outside the upper mold assembly and the valving type internal-external support component. The invention adopts a hot-extrusion shrink-opening method to realizeprecise plastic moulding of the complicated branch type light alloy components with the big middles and small ends, so that problems in a conventional production method can effectively be overcome, the formability of light alloys is improved, the comprehensive mechanical properties of the formed component is improved, the material utilization rate is greatly increased, the energy is saved and theconsumption is reduced.

The invention relates to the field of anchor chains, and more particularly an anchor chain (1) comprising a first plurality of links (3) and, at the end of the chain, a second plurality of links (4) comprising at least three successive links (4) in each of which at least one property selected from its bar diameter and the elastic limit of its material is substantially greater than in each of the links (3) of the first plurality, in order to improve the ability of the chain to withstand fatigue by bending of the links (4) in the second plurality.

The invention discloses an extrusion molding method of a large-belly and small-mouth branch light alloy component. The method comprises the following steps: (1) preparation before molding: a light alloy cylindrical part and an extrusion molding mold are totally preheated; the extrusion molding mold mainly comprises an upper mold module, a lower mold module, an ejection device and split inner and outer support modules; a molding angle is arranged on a convex mold of the upper mold module, and is transited from small to big and from big to small; the split inner and outer support modules are arranged between the upper mold module and the lower mold module; the ejection device is arranged below the lower mold module, and is connected with the lower mold module in a clearance fit manner; and the top end of the ejection device is contacted, matched and connected with the split inner and outer support modules; (2) molding process: the light alloy cylindrical part is deformed by three phasesunder the effect of convex mold pressure: (1) a radial micro-necking deformation phase, (2) a radial large-necking deformation phase, and (3) a final molding phase; and (3) a necking cylindrical partis taken down after the extrusion molding is finished.

The invention discloses a synchronous extrusion molding mold for H-shaped steel connectors different in wall thickness. The mold comprises an upper mold assembly, a lower mold assembly and a guiding and jacking assembly; the upper mold assembly comprises an upper template, an embedding member, an upper mold base, a convex die, an upper mold sleeve plate, a threaded coil and a return ring; the lower mold assembly includes a lower template, a lower template pad, a lower mold support plate, a bottom core, a pressing sleeve, a shrink sleeve and a concave die; an inner flange is formed in the concave die, the concave die sleeves the upper portion of the bottom core, and the bottom core and the convex die form a transition fillet and inclination; the guiding and jacking assembly comprises a guiding column, a guiding sleeve, a jacking rod, a bottom plate, pull rods, sleeves and connecting rods. The mold adopts a warm extrusion synchronous forming method for achieving precision plastic formingof the H-shaped connectors different in wall thickness in order to effectively solve problems caused by existing conventional machining and manufacturing methods, so that the formability of alloys isimproved, the comprehensive mechanical performance of the formed connectors is improved, the utilization rate of materials is greatly increased, the production efficiency is greatly improved, energyis saved, and emissions are reduced.

The invention discloses an extrusion forming method of a thin-wall near-contoured chevron light alloy member, which relates to an extrusion forming die of the thin-wall near-contoured chevron light alloy member. The die comprises an upper die assembly, a lower die assembly, an ejection device, material ramming device, a fixed component and a movable component, wherein the upper die assembly, the lower die assembly and the ejection device form a forming part outer ring wall channel, a corner channel and a forming part inner ring wall channel. The method comprises a first pass extrusion formingand a second pass extrusion forming, wherein the first pass comprises the following steps of extruding and forming the bottom and the outer ring wall of the chevron piece through the corner channel and the outer ring wall channel, and then ramming, demoulding and ejecting, and in the second pass, extruding and forming the inner ring wall of the chevron piece through the inner ring wall channel. According to the extrusion forming method of the thin-wall near-contoured chevron light alloy member, the precise plastic forming of the thin-wall near-contoured complex chevron member is achieved, theproblems brought by the traditional processing and manufacturing die are effectively overcome, the formability of the light alloy is improved, the comprehensive mechanical property of the formed member is improved, the material utilization rate is greatly improved, the energy is saved and the consumption is reduced.

The invention discloses a synchronous extrusion forming method for H-shaped steel connectors different in wall thickness. The method involves a synchronous extrusion forming mold for the H-shaped steel connectors different in wall thickness. The mold comprises an upper mold assembly, a lower mold assembly and a guiding and jacking device assembly; the method includes the steps that the mold and blanks are preheated before forming, three deformation processes are conducted during extrusion of a concave-convex die, and the connectors are guided out after final forming. The method adopts a warm extrusion synchronous forming mode for achieving precision plastic forming of the H-shaped connectors different in wall thickness in order to effectively solve problems caused by existing conventionalmachining and manufacturing methods, so that the formability of alloys is improved, the comprehensive mechanical performance of the formed connectors is improved, the utilization rate of the materialsis greatly increased, the production efficiency is greatly improved, energy is saved, and emissions are reduced.

The invention discloses a nuclear main pump stator shield sleeve zero-clearance plasticity attachment precision assembly device which is mainly used for zero-clearance plastic deformation attachment precision assembly between a nuclear main pump stator shield sleeve and a shield motor stator and belongs to the field of nuclear electricity. The nuclear main pump stator shield sleeve zero-clearance plasticity attachment precision assembly device is composed of a stator module, a module rack, a hydraulic system and a control system. Hydraulic pressure in a sealed cavity and a load path of the hydraulic pressure are accurately controlled after being determined through analysis of a technology value through utilization of incompressibility of liquid through computer programming, wherein the sealed cavity is formed by the stator shield sleeve and a support cylinder of the stator module. Assembly process of repeatedly and evenly loading and unloading the ultra-thin stator shield sleeve with a large length-diameter ratio is achieved. Plastic deformation of materials is accurately controlled and the zero-clearance plastic deformation attachment precision assembly of the stator shield sleeve is achieved.

The invention discloses an extrusion forming die for a thin-wall near-contoured chevron light alloy member, which comprises an upper die component, a lower die component, an ejection device, a material ramming device, a fixed component and a movable component, wherein the upper die assembly comprises an upper die plate, a male die fixed ring, a first pass male die and a second pass male die, the first pass male die and the second pass male die are interchangeable, the lower die assembly comprises a lower template, a female die, a middle female die and a mandrel, the middle female die and the mandrel are interchangeable. When the upper die assembly is assembled with the first pass male die, the female die is correspondingly provided with the middle female die, a middle male die is providedwith a discharging channel, and a lower annular wall is extended out of the lower section of the discharging channel. The ejection device comprises an ejection block and an ejector rod. The material ramming device comprises a material ramming plate. The fixed component and the movable component comprise an umbrella cap, a cylindrical pin, a fixed block, a hanging erbium and a chain. According to the extrusion forming die for the thin-wall near-contoured chevron light alloy member, the precise plastic forming of the thin-wall near-contoured complex chevron member is achieved, the problems brought by the traditional processing and manufacturing die are effectively overcome, the formability of the light alloy is improved, the comprehensive mechanical property of the formed member is improved, the material utilization rate is greatly improved, the energy is saved and the consumption is reduced.