3results about How to "Eliminate processing stress" patented technology

The application discloses a rolling-drawing combined forming method for a titanium alloy small-diameter thick-wall pipe in the technical field of metal pipe processing, and aims at the technical problems of poor size uniformity of the titanium alloy small-diameter thick-wall pipe, defects such as easy folding and scratching of an inner wall, and low flaw detection qualified rate in the prior art, and provides a rolling-drawing-rolling combined forming system integration method, realizes synchronous optimization of pipe size precision, surface quality and internal organization through a complete process chain of vertical extrusion blanking, surface treatment and finishing forming, annealing straightening and machining finishing, composite coating protection and multi-pass drawing, precision finishing and multi-pass rolling annealing and finished product flaw detection treatment. The method adopts a composite lubrication system combining copper plating and MoS2 solid coating, cooperates with coupling regulation and control of deformation and Q value and a differential interpass annealing system, effectively inhibits the generation and inheritance of inner wall defects in the forming process, and significantly improves production efficiency and product quality stability.

A spinning processing method of a super high strength steel large diameter cylindrical part, the present application realizes high precision spinning forming of the super high strength steel large diameter cylindrical part through the forming method of first pass, second pass continuous spinning + intermediate annealing + third pass, fourth pass continuous spinning by a three spinning wheel vertical numerical control powerful spinning machine. The present application is more stable in metal flow during powerful spinning process, realizes iterative optimization of product processing process precision, and the processed cylindrical part has good apparent quality and high precision. The present application defines the heat treatment opportunity in the spinning pass of the super high strength steel cylindrical part, eliminates processing stress through recrystallization annealing, improves the fiber state of the structure, restores the deformation plasticity of the spinning cylindrical part, greatly improves the spinning processing efficiency of the large diameter 31Si2MnCrMoV super high strength steel cylindrical part under the premise of ensuring the internal and external quality of the cylindrical part. The present application lays a technical foundation for the batch application of 31Si2MnCrMoV super high strength steel in the manufacture of large light weight ultra-thin high strength shell.

This invention relates to the field of fire-resistant insulated cable manufacturing technology, and discloses a continuous manufacturing process for high-yield mineral-insulated fire-resistant cables, comprising: pretreatment, drawing pure copper rods into wires and then stranding and pressing them to obtain stranded copper conductors; insulation wrapping, wrapping mica tape around the outer wall of the stranded copper conductors to obtain an insulating core; filling and forming, longitudinally wrapping copper tape around the outer wall of the insulating core, and filling the space between the copper tape and the insulating core with magnesium oxide powder to form an insulating layer; sheath welding, welding the gaps between the copper tapes after longitudinal wrapping to obtain a copper protective sheath; corrugating and shaping, rounding the copper protective sheath, and then rolling the copper protective sheath into a corrugated tube shape to obtain a cable; softening and straightening, performing a first annealing treatment and a second annealing treatment on the cable in sequence, and performing a first water cooling treatment on the cable after the first annealing treatment; protection and cooling, placing the cable after step six into a nitrogen pipeline for cooling, and then performing a second water cooling treatment on the cable.