269results about How to "High loading accuracy" patented technology

The invention discloses an intelligent NC super high pressure true 3D uneven loading and unloading and pressure stabilizing model test system. The system includes a combined rack reaction device, a super high pressure true 3D uneven loading and unloading device, an intelligent hydraulic pressure unloading and pressure stabilizing NC system, a model displacement automatic test system and a high-definition multi-probe peeping system. The super high pressure true 3D uneven loading and unloading device is arranged in the combined rack reaction device for performing super high pressure true 3D uneven loading and unloading on a test model. The intelligent hydraulic pressure unloading and pressure stabilizing NC system is connected with the super high pressure true 3D uneven loading and unloadingdevice through a high pressure oil pipe. Through input commands of the intelligent hydraulic pressure unloading and pressure stabilizing NC system, digital servo control of the super high pressure true 3D uneven loading and unloading device for super high pressure true 3D gradient uneven loading and unloading and pressure stabilization control is realized. The model displacement automatic test system collects displacement of any parts in the model automatically. The high-definition multi-probe peeping system observes a tunnel digging, deforming and destruction processes dynamically in real time. The system has advantages of large and adjustable size of the reaction device, servo control of loading, large loading volume, high loading precision, good pressure stabilizing performance, unevenloading and the like. The scale and the performance are innovative home and abroad and non-continuous deformation and destruction processes of deep tunnel digging in a complex environmental conditions can be simulated and accurate information of multi-physical field evolution such as tunnel surrounding rock displacement, stress, strain and the like of tunnels can be acquired through automatic testing. The system has significant application prospects in simulating nonlinear deformation and destruction mechanisms of deep underground projects including energy, traffic, hydro-power and mine and the like.

Disclosed herein is a wafer polishing device including: an abrasive member driving device adapted to run a belt-like abrasive member in a direction crossing an outer circumferential end-edge of a wafer which is a wafer to be polished while bringing a belt-like abrasive member into contact with outer circumferential end-edge of the wafer, the abrasive member having non-abrasive sections disposed on both sides of an abrasive grain section; and a guide member having two guide surfaces shaped to conform to the outer circumferential end-edge of the wafer, the two guide surface being adapted to press, from rear sides of the non-abrasive sections, the respective non-abrasive sections of the abrasive member run by the abrasive member driving device.