6 results about "Wall thinning" patented technology

The application discloses a kind of high-strength HDPE drainage pipe production methods, belong to HDPE water pipe production technical field, mainly including raw material preparation, raw material pretreatment, extrusion molding, cooling and shaping and stretching and cutting etc. Step, just extruded waste and traction pipe sealing adhesion, new material is affected by traction mechanism and enters into the shaping device from extruder, mainly through the way of vacuum suction and air pressure expansion to ensure that the size and shape of pipe material meet the design requirements, the traction speed of traction device is 1%-10% higher than the speed of extruder, to overcome the die swell of pipe material, secondly, the traction speed of traction device is adjustable slow speed affected by the stretching of pipe material in shaping device, effectively reduce the problem that pipe wall is thinned due to pipe material is pulled up too fast in shaping device, to improve the mechanical properties and longitudinal dimension stability of product.

The application discloses a control method for preventing hole meat loss of high-line screw thread steel finished products, and belongs to the technical field of metallurgy. The control method for preventing hole meat loss of high-line screw thread steel finished products provided by the application mainly comprises the following steps: the temperature of a control roller ring is controlled below 50 DEG C by using cooling water; the temperature of a rolled piece head entering a reducing mill train is ensured to be 820-850 DEG C by controlling water operation of the rolled piece; the pre-precision rolling and 8-rack incoming materials are controlled within the lower limit of a process requirement size; and a 76-degree milling cutter tip angle is used to process a thread roller ring. By the above method, the hole meat loss phenomenon of the high-line screw thread steel finished products can be greatly reduced.

The utility model discloses a hollow half shaft reducing die, which belongs to the field of manufacturing of automobile parts and comprises an upper die, a lower die, a lower die, a lower die, a lower die and an upper pressing head. The upper die is connected with external pressurizing equipment, and the upper pressing head is used for limiting and abutting against a workpiece to be machined; the lower die is located under the upper die, the lower die comprises a hole shrinkage die body, and the upper die and the lower die are matched to press a workpiece to be machined into the hole shrinkage die body for hole shrinkage; the lower die further comprises a righting assembly, the righting assembly is located over the reducing die body, and the righting assembly is used for enabling a workpiece to be machined to enter the reducing die body at a fixed angle. The centering assembly is arranged to apply inward radial holding force to the to-be-machined part, so that the to-be-machined part is always kept at the correct axial position in the moving process in the lower die, the conditions that the end of the cold-rolled steel pipe is broken, the pipe wall is thinned and the like after diameter shrinkage are avoided, and the diameter shrinkage forming quality can be guaranteed.

The utility model relates to the technical field of inductors, in particular to an inductor capable of resisting high-frequency vibration. The inductor resistant to high-frequency vibration comprises a framework, the framework comprises a framework body and a framework cover, a containing groove is formed in the framework body, and a magnetic core is arranged in the containing groove; the outer wall of a notch of the accommodating groove is thinned to form a first mounting edge; a second mounting edge is formed on the edge of the framework cover; the framework cover covers the framework main body; the first installation edge abuts against the second installation edge, and the first installation edge abuts against the inner top wall of the framework cover. When the framework body and the framework cover are closed in a covering mode, the first installation edge abuts against the second installation edge, the first installation edge abuts against the inner wall of the framework cover, a gap between the framework body and the framework cover can be adjusted to the position of the inner top wall of the framework cover through the design, a magnetic core in the framework cannot rub or collide with the gap, and therefore the magnetic core is protected. In addition, according to the design, the creepage distance between the magnetic core and the outside is increased, and the safety of the inductor is improved.

The utility model discloses a dry quenching boiler pipeline isolation device, including first sheath, connecting plate, second sheath and third sheath, the first sheath right side low position is equipped with second sheath, the first sheath left side low position is equipped with third sheath, the first sheath, second sheath and third sheath structure are same, and first sheath, second sheath and third sheath top all weld and have connecting shell, the both ends of connecting shell all are open structure, and the both sides bottom of first sheath, second sheath and third sheath all weld and have connecting sleeve. The utility model through being equipped with a plurality of sheaths, and the bolt installation and dismounting between sheath and connecting plate can be selectively installed and used according to the demand, can isolate the pipeline, avoids a large number of circulating air volume and washes the pipe wall to make the shaking, the clearance smaller elbow place rubs each other, makes the pipe wall thin and the pressure strength reduction to the security of pipeline installation is increased.

The present disclosure relates to at least one method for ascertaining at least one attribute of pressure vessel wall. A method comprises: while a pressure vessel, which comprises a wall having an outer surface and an inner surface, is operating: ascertaining a current wavelength shift of a first fiber Bragg grating (FBG) sensor disposed at a first outer surface location on the pressure vessel; and ascertaining a current thickness of the wall at the first outer surface location by: computing a vector based on a time series of the current wavelength shift, or a derivative of the time series, or a derivative of the current wavelength shift; providing the vector to a predetermined regression model; and using the regression model, ascertaining the current thickness of the wall.