5results about How to "Overcoming deformation" patented technology

The invention belongs to the technical field of semiconductor processing, and discloses a semiconductor wafer positioning device which comprises a shell, an outer ring is fixedly installed at the top end of the shell, a plurality of guide grooves are formed in the circumference of the upper surface of the outer ring at equal intervals, sliding blocks are slidably connected to the middles of the guide grooves in a sleeving mode, and a plurality of positioning mechanisms are arranged on the circumference of the outer curved surface of the shell at equal intervals. A driving mechanism fills air between a connecting seat and a fixing plate in an inner cavity of a shell to push an adsorption mechanism to move upwards, and a plurality of pressure valves which bear the maximum atmospheric pressure equal to the weight of the adsorption mechanism are arranged, so that when a wafer is separated from a clamping and positioning device and is in contact with an object carrying sleeve, the plurality of closed pressure valves are opened, and the wafer is clamped and positioned. And the wafer slowly pushes the adsorption mechanism to move downwards under the action of gravity, so that the problems of wafer deformation and center offset caused by rigid contact between the wafer and the workbench in the process of directly placing the wafer on the upper surface of the workbench in the existing wafer positioning and clamping device are solved.

The present invention discloses a method for detecting deformation of a preform based on intelligent fibers, and relates to the technical field of composite material structure manufacturing and detection, including: preparing liquid metal intelligent conductive fiber yarns, and weaving the prepared fiber yarns into the preform; collecting the resistance change of the liquid metal intelligent conductive fiber yarns, performing preliminary weaving tests and mechanical tests, and obtaining fiber yarn deformation conditions and electrical signal data; constructing a fiber yarn deformation and electrical signal relationship model based on the fiber yarn deformation conditions and electrical signal data, and applying the fiber yarn deformation and electrical signal relationship model to the actual preform weaving process, and obtaining fiber yarn deformation information in real time. The present invention can detect yarn deformation and internal stress conditions in the preform weaving process in real time, which is beneficial to quality inspection, strength and life analysis of the preform.

This invention discloses a large-arc bend injection mold and molding method, belonging to the field of injection molding technology. The mold includes a moving mold, a fixed mold, and a core mold with a circular arc core; it also includes a demolding drive mechanism for driving the core mold and product to generate a first displacement away from the fixed mold; and a pointer-type rotary demolding mechanism, which includes a pointer push rod and a push ring rotating around the axis of the circular arc core. During demolding, after the product is lifted with the core mold, the pointer push rod drives the push ring to swing along the circular arc path to push the product out. This invention also reduces the covering force by performing pre-demolding through an assisted demolding mechanism and ensures the stability of the core mold during injection molding using a core positioning mechanism. This invention replaces the traditional hot bending process with one-time injection molding, solving the problems of low production efficiency, poor roundness, and easy cracking caused by thermal stress in existing technologies for large-arc bend pipes, significantly improving the geometric accuracy and operational reliability of the product, and is particularly suitable for ultra-high voltage converter valve cooling system pipelines.

The utility model provides a sheet attaching device used for attaching a sheet to a target part. The sheet attaching device comprises a sheet carrying station, a sheet attaching station and a sheet attaching station, a target member mounting station; the first sheet positioning device is configured to be capable of moving to a sheet carrying station and acquiring a first position signal of a sheet on the sheet carrying station; the sheet picking device is configured to move and pick up the sheet according to the first position signal of the sheet, and the sheet picking device is further configured to be capable of moving to the target component carrying station and attaching the sheet to the target component on the target component carrying station. An apparatus of the utility model; and the problem of unnecessary deformation of the sheets caused by manual operation is avoided. Moreover, the sheets can be accurately positioned and picked in the sheet picking stage, and the accurate sheet attaching operation can be generally carried out after the sheets are accurately picked.

The present invention discloses a compact microchannel LNG heat exchanger and a preparation method thereof. The heat exchanger includes a heat exchanger body, and a plurality of cold fluid channels and hot fluid channels are arranged alternately and at intervals in the vertical direction. The two ends of the cold fluid channel are respectively connected to the cold fluid inlet and the cold fluid outlet, and the two ends of the hot fluid channel are respectively connected to the hot fluid inlet and the hot fluid outlet. The cold fluid channel includes a first diverter channel, a cold side heat exchange channel and a first confluence channel. The hot fluid channel includes a second diverter channel, a heat measurement heat exchange channel and a second confluence channel. The present invention adopts a countercurrent arrangement, and a large temperature difference stress is not generated at both ends of the heat exchanger. Diverter and confluence channel sections are respectively arranged after the fluid inlet and before the fluid outlet. The fluid flows through the diverter channel, and the diverter channel makes the flow distribution more uniform, so that the medium temperature is evenly distributed. The preparation method adopts additive manufacturing technology for one-piece molding, and the material utilization rate is high, which ensures the stability and efficiency of the heat exchanger operation.