6results about How to "Eliminate Stability Issues" patented technology

The invention discloses an intelligent design method and system for ultra-thin ceramic false teeth. The intelligent design method comprises the following steps: constructing a two-dimensional template library and a three-dimensional template library, and respectively registering two-dimensional and three-dimensional templates with a three-dimensional dental model of a patient by using a template registration algorithm; after the registration of the three-dimensional template and the three-dimensional dental model of the patient is completed, a veneering three-dimensional model is obtained through Boolean subtraction; calculating the thickness of a marked anatomical region of the veneering three-dimensional model by adopting an SDF (Software Development Function), and if the thicknesses of some regions do not meet clinical requirements, performing thickening and smoothing operation on the veneering three-dimensional model according to a thickness threshold value determined by material physical characteristics and aesthetic veneering types corresponding to the regions; a mark of an inner surface bonding force enhancing area is arranged on a veneering three-dimensional model meeting clinical requirements, and according to the precision required by the veneering three-dimensional model, a method of direct three-dimensional modeling presentation or process fine adjustment is selected, so that manufacturing of a micro-area structure of the marked area is achieved. The veneering three-dimensional model designed by the invention can improve the repair quality and the comfort of a patient.

The invention relates to the technical field of mechanical transmission, and provides a coupling capable of clamping different shaft diameters and invariable in rotational inertia, which comprises an upper jaw adjusting mechanism, a middle rotational inertia compensation mechanism and a lower jaw adjusting mechanism, the upper clamping jaw adjusting mechanism comprises a first chuck, a first plane gear ring and a plurality of adjusting units. The first plane gear ring sleeves the outer side of the first chuck; the multiple adjusting units are evenly distributed in the circumferential direction of the first chuck, and each adjusting unit is located in the radial direction of the first chuck. The adjusting unit comprises a first bevel gear, a first worm and a clamping jaw; the first bevel gear is meshed with the first plane gear ring; the first bevel gear is rigidly connected with the first worm; a threaded hole is formed in the clamping jaw, the first worm penetrates through the clamping jaw, and the first worm is meshed with the threaded hole of the clamping jaw. The clamping device can clamp rotating shafts with different shaft diameters, and it is guaranteed that the rotational inertia is not changed when the rotating shafts with the different shaft diameters are clamped.

The embodiment of the present application provides a rolling mill flat head sleeve automatic adjusting device, and the design relates to the field of rolling mill production, and the device comprises a bracket body, upper and lower flat head sleeves which are evenly arranged on the bracket body, an adjusting assembly, a driving assembly, a pressure detection assembly and a PLC control system, the adjusting assembly is arranged on the bracket body and is connected with the upper and lower flat head sleeves, and the adjusting assembly is used for adjusting the acting force between the upper and lower flat head sleeves; the driving assembly is connected with the adjusting assembly; the pressure detection assembly is arranged at the connecting position of the adjusting assembly and the lower flat head sleeve, and is used for detecting the acting force between the upper and lower flat head sleeves; and the PLC control system is arranged on the bracket body and is electrically connected with the pressure detection assembly and the driving assembly at the same time. The present application can eliminate the influence of the change of roll gap caused by excessive vibration due to operation imbalance on the stability of rolling.

This invention relates to the field of N-(2,4-dinitrophenyl)-4-nitrobenzamide preparation technology, specifically to a green method for preparing nitramide compounds. The method involves adding a catalyst and dispersant to a reactor and mixing them uniformly. Then, a first and a second stream of materials are simultaneously added dropwise to the reactor for reaction. The temperature within the system is controlled during the dropwise addition. After the dropwise addition is complete, the temperature is increased to continue the reaction. After the reaction is completed, N-(2,4-dinitrophenyl)-4-nitrobenzamide is obtained through post-treatment. The first stream is a dispersion containing 4-nitro-N-phenylbenzamide, and the second stream is a nitrating agent consisting of a uniform mixture of N₂O₅ and nitric acid. This preparation method features high product conversion rate, a mild reaction process, safe and controllable production process, effectively reduces the amount of residual intermediates, and minimizes pollution.

The utility model relates to the technical field of static electricity eliminating devices, and discloses a static electricity eliminating device for chemical safety production, which comprises a fixing frame, an air pipe, a swinging cylinder and a frame, a rotating shaft I is connected below the fixing frame, the rotating shaft I is connected with the air pipe, arc-shaped racks are connected above and behind the air pipe, and a gear I is meshed and connected above the arc-shaped racks; a rotating rod is connected to the middle of the first gear, the left end of the rotating rod is connected with the output end of a swing air cylinder, the swing air cylinder is fixedly connected with the inner wall of a fixing frame, a third rotating shaft is connected to the fixing frame, and a second motor is connected to the upper end of the third rotating shaft which is rotationally connected with the frame. The static electricity removal device is suitable for static electricity removal in a large factory, and static electricity removal can be carried out in all directions and in a large-area space.

The present application proposes a current mirror circuit, comprising: a first branch, one end of which is configured to receive a fixed level and the second end of which is configured to receive an input current; the second branch circuit is electrically connected with the first branch circuit at a first node and a second node, one end of the second branch circuit is configured to receive a fixed level, the second end of the second branch circuit is configured to provide an output current, and the output current is generated based on the input current; the third branch circuit at least comprises a first resistor, and one end of the first resistor is configured to receive a fixed level; the drain electrode of the first transistor is electrically connected to the other end of the first resistor, the grid electrode of the first transistor is electrically connected to the first node, and the source electrode and the substrate of the first transistor are electrically connected to the second node and configured to receive the bias current. The current mirror circuit is high in copying precision, wide in replicable reference current range, small in occupied voltage redundancy and simple in circuit, a clamping loop does not need to be introduced, and the potential loop stability problem is eliminated.