9results about How to "Reduce the deformation" patented technology

The invention relates to the technical field of martensitic steel, in particular to a 04Cr13Ni5Mo stainless steel plate rolling and temperature control process, which comprises the following steps: heating a pretreated blank to 1190-1210 DEG C at a heating rate of more than 0 DEG C and less than or equal to 5 DEG C / min, and soaking for more than or equal to 2 hours; the rolling reduction rate of the blank is controlled to be 12%-15%, and compared with the reduction rate of the pass before final rolling, the reduction rate is reduced by 20%-25%; stacking slow cooling is larger than or equal to 550 DEG C, and the plate yield is increased by 30% or Through heat treatment processes of normalizing at 1040 DEG C + / -10 DEG C, preserving heat of a plate with the thickness of 85 mm for 4 hours, preserving heat of a plate with the thickness of 115 mm for 5 hours, tempering at 620 DEG C + / -10 DEG C, preserving heat of the plate with the thickness of 85 mm for 6 hours and preserving heat of the plate with the thickness of 115 mm for 8 hours, the yield ratio is stabilized at 0.8-0.85, and the uniformity of mechanical properties is improved by 25%. The stable yield ratio reduces the deformation amplitude of plates and workpieces by more than 40% during later processing, additional repair is not needed, and the production cost is reduced.

The utility model provides a blood pump which comprises a rotor assembly, a stator assembly and a shell, the rotor assembly and the stator assembly are arranged in the shell in a spaced mode in the rotation axis direction of the rotor assembly, the rotor assembly comprises an impeller, a power magnetic ring and a center shaft, and the blood pump further comprises a first magnetic bearing assembly. The first magnetic bearing assembly comprises a first inner magnetic bearing and a first outer magnetic bearing which are matched with each other, the first outer magnetic bearing is arranged on the inner wall of the shell, and the impeller, the first inner magnetic bearing and the power magnetic ring are all fixedly arranged on the center shaft; the rotor assembly can rotate around the axis of the rotor assembly so as to drive fluid to flow into and out of the shell, and in the power-on state, the rotor assembly can be spaced from the stator assembly by a first preset distance in the rotating process. All the components of the rotor assembly are fixed on the central shaft, so that the stability of relative positions of all the components is guaranteed, the overall structural strength of the rotor assembly is improved, the stability of operation of the blood pump is guaranteed, and the service life of the blood pump is prolonged.

This utility model relates to the field of pipe support devices, and more particularly to a high-strength, earthquake-resistant metal pipe support device, comprising a pipe body; earthquake-resistant components are fitted on the exterior of both ends of the pipe body, and a support component is fitted in the middle of the pipe body. This utility model utilizes an arc-shaped limiting frame in the earthquake-resistant component to adjust its height according to the diameter of the pipe body, thereby limiting and fixing the pipe body. Then, the support component is lifted and placed in the middle of the pipe body, and its rotation adjustment provides oblique support to the pipe body. Through the combined use of the rubber vibration-damping pad inside the arc-shaped limiting frame and the support column in the support component, vibration transmission can be reduced. In this way, pipe displacement, swaying, and deformation can be effectively reduced, lowering the probability of pipe rupture and leakage, protecting the substances transported inside the pipe from leakage, and preventing secondary disasters such as fires, explosions, and poisoning caused by leaks.

The invention discloses a mining control method based on coal mine excavation and mining filling and retaining coupling, and belongs to the technical field of coal mine mining control. The method comprises the following steps: constructing a physical similar model for simulating geological conditions of a target coal mine, excavating a simulated roadway according to a preset tunneling sequence to form a simulated mining surface, implementing simulated filling operation to form a simulated filling body, and reserving simulated coal pillars between the simulated roadway and the simulated mining surface to form a supporting structure; in the mining and filling process, overlying strata and ground surface subsidence displacement data are collected, a roof subsidence curve is drawn, wave crest and wave trough positions are identified, overlying strata movement differences are analyzed, the ground surface subsidence rate is calculated, and on-site actual mining parameters are guided accordingly; according to the method, the supporting effect can be optimized, the overlying strata movement rule can be accurately mastered, and the mining safety problem caused by insufficient data analysis and unreasonable supporting design in coal mine excavation and mining is solved; scientific guidance is provided for on-site mining parameter adjustment, and coal mining requirements under complex geological conditions are met.

The invention relates to a process method for reducing heat treatment deformation of slender shaft type spring steel parts, which comprises the following steps of: after quenching and before main tempering for determining the final mechanical property of the parts, at least carrying out a pre-straightening process once, and carrying out main straightening and low-temperature tempering after the main tempering; the pre-straightening process comprises the following steps: pre-tempering the part at the temperature lower than the main tempering temperature, and then pre-straightening; wherein the target value of the pre-straightening straightness is greater than the target value of the main straightening straightness. Deformation of slender shaft spring steel parts is effectively reduced, and the straightness requirement is met.

The invention discloses a floating type offshore photovoltaic platform. Comprising a bottom frame; the first floating cylinders are mounted on the bottom frame; the top mounting frame is arranged above the bottom frame, is provided with a flexible cable and is used for mounting a photovoltaic panel; the upper ends of the stand columns are connected with the corners of the top mounting frame respectively, and the lower ends of the stand columns are connected with the corners of the bottom frame respectively; the upper ends of the reinforcing rods are connected with non-corners of the top mounting frame, and the lower ends of the reinforcing rods are connected with non-corners of the bottom frame. The vertical columns are arranged at the corners of the top mounting frame and the bottom frame, meanwhile, the reinforcing rods are additionally arranged to connect the non-corner areas of the top mounting frame and the bottom frame, and a three-dimensional supporting system of the corner vertical columns and the non-corner reinforcing rods is formed. Stress caused by sea wave impact, water flow disturbance and wind load can be dispersed, bending deformation and vibration amplitude of the top mounting frame are reduced, fatigue damage of the frame structure is avoided, and the overall structural strength of the platform is improved.

This utility model relates to the field of footwear and apparel technology, specifically to a cotton fiber environmentally friendly shoe upper, including a shoe upper body woven from environmentally friendly fibers and an opening integrally formed on the shoe upper body at the corresponding position of the heel of the human foot. A high-density woven layer made of environmentally friendly fibers is sewn and fixed on the shoe upper body, extending from the corresponding position of the shoe upper body at the heel of the human foot to the corresponding position of the shoe upper body at the forefoot of the human foot. The high-density woven layer is provided with a plurality of stabilizing blocks.

The application discloses a box, a battery device and a vehicle. The box comprises a bottom plate and a frame. The frame is arranged around the periphery of the bottom plate and defines a containing space. A first beam is arranged in the containing space. The first beam extends in a first direction and is connected to the frame in a second direction to divide the containing space into an electrical area and an energy area. The bottom plate comprises an energy area bottom plate and an electrical area bottom plate. The frame comprises a first frame arranged opposite in the first direction and a second frame arranged opposite in the second direction. The second frame, the electrical area bottom plate and the first beam that participate in defining the electrical area are configured as an integral piece. Thus, the force bearing interface can be expanded, the structural rigidity of the box, especially the bending and torsional rigidity, can be significantly improved, the structural rigidity and the anti-vibration fatigue performance of the box can be improved, the rigidity and the modal main frequency of the battery device can be improved, the deformation amplitude of the box structure in the vibration process can be reduced, the stress level can be reduced, and the fatigue strength can be improved.