54 results about "Necking" patented technology

A breathable elastic laminate is formed by bonding a film including an elastic water vapor-soluble polymer to a neckable nonwoven web such that when the film is relaxed, the web is in a necked state. The breathable laminate is stretchable in a direction parallel to the narrowing or necking of the web. The laminate possesses excellent water vapor permeability but acts as a barrier to the passage of odor-causing chemicals including ammonia.

The invention discloses a tool and method for backfilling a deep foundation pit excavation groove. The tool comprises two fixed channel steel which are parallel to each other, and a funnel is arrangedbetween the two fixed channel steel. The funnel comprises a square hopper mouth and necking, a fixed cylinder is fixed to the bottom of the necking by welding, a flange is fixedly installed at the bottom of the fixed cylinder by welding, a plurality of detachable cylinders are arranged at the bottom of the fixed cylinder, and two supporting transverse bars are arranged below the fixed channel steel. A first cylinder is fixed to a first cylinder mounting plate, a first baffle is fixed to the end part of an output rod of the first cylinder, a second cylinder is fixed to a second cylinder mounting plate, and a second baffle is fixed to the end part of an output rod of the second cylinder. According to the tool and method for backfilling the deep foundation pit excavation groove, the cost issaved, the construction period is shortened, the quality of the project and the safety of workers during operation are ensured, safety and stability in the construction process are achieved, and the transportation of the excavation groove backfill tool is facilitated.

The invention discloses a UHPC (Ultra High Performance Concrete)-necking type profiled steel sheet composite template combined shear wall. The shear wall comprises two necking type profiled steel sheets, the two necking type profiled steel sheets are oppositely distributed, UHPC layers are formed on the outer sides of the two necking type profiled steel sheets in a pouring mode, J-shaped hooks are arranged on the two necking type profiled steel sheets, one ends of the J-shaped hooks are located in the UHPC layers, longitudinal shear keys and transverse shear keys are fixed to the ends of the J-shaped hooks, the other ends of the J-shaped hooks penetrate through the necking type profiled steel sheets, and the longitudinal shear keys and the transverse shear keys are fixed to the UHPC layers. J-shaped hooks are arranged on the two necking-down type profiled steel sheets, the J-shaped hooks on the two necking-down type profiled steel sheets are in one-to-one correspondence, the J-shaped hooks on one necking-down type profiled steel sheet are connected with the corresponding J-shaped hooks on the other necking-down type profiled steel sheet in an opposite pulling mode, and concrete is poured between the two necking-down type profiled steel sheets. And under the action of a horizontal load, the shear failure is not easy to occur.

The invention discloses a square pipe joint necking machine. The square pipe joint necking machine is structurally provided with a machine body, a control door, a motor, an adjusting table, a pressingframe, a necking device and a rear driving table, wherein in a clamping process for a pipe joint, an extrusion force is exerted on an elastic ejection device, an ejection body retracts towards the interior of a side ring cavity, and the pipe joint to be necked can make contact with a square necking die conveniently; the elastic ejection device is not subjected to the extrusion force of the pipe joint, and is ejected to the front side end of the square necking die while carrying out concave bending deformation under the springing of spring steel, so that residual chippings are sprung and ejected off, the chippings are prevented from being adhered and accumulated on the wall surface of the square necking die, and after the chippings are ejected off, the necking body is rotated, and the chippings are thrown to a contact port; and a one-way door is extruded to be opened towards the interior of an inner groove chamber, the chippings fall into the inner groove chamber and are collected, then the chippings fall into the bottom of the inner groove chamber through holes in a middle clamping plate and are firmly stuck by a bottom sticking strip, and therefore the situation that in the rotating process, the one-way door is continuously opened and closed, and the chippings fall out is avoided.

The invention relates to the field of cup automation, and discloses a cup rim processing technology which comprises the following steps: a, assembly line feeding: putting cup bodies on an assembly line capable of conveying the cup bodies in a stepping manner; b, cup body opening necking is conducted, specifically, to-be-machined cup bodies on an assembly line are placed on a cup opening necking device through a feeding and discharging device, and threads are driven to be formed on cup body openings; c, material changing is conducted through the necking device, and through the feeding and discharging device, the positions of the cup bodies to be machined on the assembly line and the positions of the cups with the necked inner cup openings in the necking device are exchanged; d, assembly line conveying is conducted, specifically, the assembly line conveys the cup with the necked cup opening to the next procedure, and the cup body to be machined is aligned with cup opening necking equipment; and e, cup mouth cutting is conducted, specifically, the water flow line is conveyed to the cup mouth cutting device, and the cup mouth of the cup subjected to cup mouth necking is cut through the cup mouth cutting device. The cups on the assembly line and the machining equipment are exchanged through the feeding and discharging device, and the working efficiency is improved.

The invention discloses a fiber-metal tube necking processing preparation method, which relates to the field of material forming; it includes the steps of: (1) pre-treating an alloy plate and a carbon fiber cloth, stacking and then blanking, rolling and forming after blanking, Seamless welding to form circular pipe fittings; (2) Heating the fiber metal pipe fittings in step (1) and extruding them into the variable-diameter shrinking die, so that the pipes are extruded with each other under the action of the variable-diameter shrinking die to produce plastic deformation and fit tightly to obtain the necked composite pipe; (3) apply ultrasonic vibration around the necked composite pipe in step (2) to assist the plastic deformation of the pipe; (4) apply ultrasonic vibration in step (3), Apply air pressure inside the necked composite pipe and heat it; (5) Keep the temperature constant, then release the internal pressure, and finally take it out for air cooling to get the final product. The necking processing and preparation method of the fiber-metal pipe provided by the invention enables the pipe fitting to have high surface quality and good mechanical properties.

The invention provides a necking failure limiting strain detection method based on DIC. The method comprises the following steps: S1, based on a DIC technique, selecting data points in a plurality ofsections vertical to a crack direction to draw a curve of primary and secondary strains varying along with time; S2, determining the limiting primary strain and the limiting secondary strain of the sections vertical to the crack direction based on the curve of primary and secondary strains varying along with time; and S3, based on the limiting primary strain and the limiting secondary strain of the sections vertical to the crack direction, drawing the limiting primary strain and the limiting secondary strain as vertical axis and cross axis in a coordinate map to obtain a formed limiting curveof a metal panel material, wherein necking failure limiting strain detection of the metal panel material is achieved. The method is quick, direct, concise and effective, and has very good universality.

The invention discloses a forming device and a method for accurately controlling temperature in different regions to realize the thickening of pipe end shrinkage, and relates to the technical field of pipe plastic processing. Die and thickening die; the pusher is used to push and extrude the tube blank under the drive of the power source; the shrinking die and / or the thickening die are equipped with a heating structure, and the shrinking die is used for the shrinkage forming of the tube blank to increase the thickness. The thick die is used for thickening and forming of the tube blank; the cooler is used to cool the tube blank temperature outside the necking die and the thickening die. The forming device and method of the present invention can realize the free adjustment of the temperature of the mold necking area and the thickening area, which not only improves the material utilization rate, product quality and connection strength, but also reduces the manufacturing cost of the mold and shortens the heating time of the mold. It is easier to clean after the mold is divided into blocks, and it is more convenient to take out the parts after forming.

The present invention relates to the circular arc back-push measurement method of the uniaxial tensile stress and strain of metal round bar samples, and the technical field of testing the mechanical properties of metal materials. The circular arc rotating body model only needs to measure the elongation of the gauge length during the stretching process of the round bar sample, and extract the coordinate information of the outer contour curve of the broken test bar, and calculate the radius of the necking arc and the minimum necking at each moment by back-calculating The section radius is directly substituted into the Bridgman method to calculate the true stress and true strain at this moment. The invention omits the test and measurement link of the minimum section radius of the necking and the curvature radius of the outer contour in the existing method, and improves the measurement accuracy of the stress-strain curve in a large strain range, which is of great significance for the mechanical performance test of metal materials.

A method for evaluating the remaining life of materials based on the image analysis of surface microtopography features, the metal smooth round bar specimens are subjected to different degrees of pre-fatigue tests under constant strain amplitude, followed by uniaxial tensile failure tests. Observing the specimens subjected to different cycles of uniaxial stretching through an optical microscope, the area near the necking will show obvious surface cracks, and the difference in the surface micromorphology of the material is strongly related to the fatigue cycle experienced by the metal material. Using special image analysis software to statistically analyze the surface cracks and roughness distribution of the material, the physical parameter "unit crack area" representing the fatigue cumulative damage is proposed, and the fatigue cumulative damage of the material surface is quantitatively described. A non-linear mapping between the "unit crack area" and the remaining life is established, and a method for evaluating the remaining life of materials based on monotonous breaking after tension and compression cycles and then performing apparent image processing is obtained. The method is simple in principle, easy to implement, and convenient for engineering application and popularization.

A method includes steps of: preparing first and second plates, each first plate having surrounding apertures, each aperture including a first accommodation portion and an outer necking portion, each second plate having surrounding accommodation portions; stacking the first plates by aligning necking portions to form band gaps extending linearly and parallel to each other; stacking two second plates to two opposing terminal portions of the stacked first plates; penetrating metal bars into the aligned first and second accommodation portions by exposing both ends of each metal bar; beetling the necking portions at each band gap so as to locate firmly the corresponding metal bar; positioning a first mold and a second mold to clamp the stacked plate structure; injecting metal slurries into the first and second molds and then solidifying the metal slurries to form two end rings; and, removing the first and second molds to complete a rotor structure.

The invention discloses a concrete pile head breaking device and method.The concrete pile head breaking device comprises a steel bar inner ring necking structure, a steel bar sleeve and an annular pile breaker, the steel bar inner ring necking structure comprises an upper necking cover, a lower necking cover and wedge blocks located on the sides of the upper necking cover and the lower necking cover, and a plurality of vertically-through open holes are symmetrically formed in the upper necking cover and the lower necking cover; when the upper necking cover and the lower necking cover are aligned, the upper open hole and the lower open hole are aligned to form a cement paste through hole, the cement paste through hole is narrow in the middle and wide in the vertical direction, slope surfaces are symmetrically arranged on the two sides of the lower surface of the upper necking cover and the two sides of the upper surface of the lower necking cover, and when the upper necking cover and the lower necking cover are aligned, wedge-shaped grooves are formed in the two side faces of the upper necking cover and the two side faces of the lower necking cover, and the wedge blocks are arranged in the wedge-shaped grooves. According to the method, only one-time pile breaking operation needs to be carried out on the bottom of the to-be-broken pile head, existing tedious pile breaking operation on multiple positions of the pile head is omitted, and the pile breaking efficiency can be greatly improved.

The invention belongs to the mechanical processing technique and relates to an improved method for processing a thin-wall alloy steel pipeline spherical necking. The method is characterized in that a common lathe and a special hobbing cutter are used for processing the pipeline spherical necking through a rotary extrusion method, and the method adopts the processing following steps of clamping, tool setting, pipe heating, vertical rotary extrusion and horizontal rotary extrusion. The special hobbing cutter is characterized in that working surfaces (5) with the circular-arc cross sections are respectively arranged at two sides of a rolling wheel (2), and are connected with the lateral side and the cylindrical surface of the rolling wheel. In the invention, the common lathe is used for processing; thereby the processing cost is greatly reduced.