77 results about "Chatter mark" patented technology

The invention belongs to the field of signal detection and automation control of rolling mills, and relates to a device for suppressing vibration of a rolling mill. The device for suppressing the vibration of the rolling mill is characterized by comprising a rolling mill vibration signal source, a vibration suppression signal generator, a vibration suppression actuating unit and the rolling mill, wherein the rolling mill vibration signal source is composed of rolling mill torsion vibration signals, rolling speed signals, rolling mill vertical vibration signals and rolling pressure signals, the vibration suppression signal generator is composed of a signal input module, a filter processing module, a phase recognition module, a vibration suppression signal module and a signal output module, and the vibration suppression actuating unit is composed of a main drive speed setter and a hydraulic roll gap setter. The device for suppressing the vibration of the rolling mill has the advantages that vibration suppression damping signals are generated by the vibration suppression signal generator according to the rolling mill vibration signal source and sent to the main drive speed setter and the hydraulic roll gap setter of the vibration suppression actuating unit so as to participate in control of the rolling mill to reduce the vibration energy of the rolling mill, so that the rolling mill can be prevented from vibrating severely, chatter marks on a roller and the surfaces of strips are eliminated, and therefore the surface quality of products is improved, and the on-line service life of the roller is prolonged.

The sliding blade microtome is a tissue specimen cutting device including a specimen syringe and an adjustable cutting mechanism for diagonally slicing the specimen. The specimen syringe is a cylindrical shaft having a first end and a second end for holding and supporting a specimen. The first end has a diameter that is smaller than the diameter of the shaft, forming a compressed lip for applying pressure on the specimen prior to slicing by the blade. The pressure used to compress the gelatin and the specimen holds the gelatin and the specimen in a sturdy position to slice the specimen to precision without chatter marks. The specimen is pushed out of the first end of the specimen syringe by a motor mechanism or a manually adjustable micrometer drive.

The invention belongs to the technical field of machining and discloses a method for milling and vibration-damping a blisk. The method comprises the following specific process steps of: (1) preparing a filling material according to the proportion; (2) melting the filling material; (3) mounting a pouring clamp; (4) pouring a filling agent; (5) condensing the filling agent at normal temperature, secondarily condensing the filling agent and checking the condensing state of the filling agent; (6) mounting a filtering clamp; and (7) carrying out the abutted milling processing and chip removal processing. By pouring the filling agent between the blisk and vanes in the milling processing of vane profile five coordinates of the blisk, the method enhances the rigidity of parts in the milling processing of the vanes, eliminates the chatter marks generated at the vent tip part of the vanes during milling and reduces the roughness of the surfaces of the vanes. Meanwhile, the rigidities of the parts and a clamping system thereof are enhanced, so that the milling feed rate is increased and the milling speed can be improved.