63results about How to "Coaxiality error is small" patented technology

The invention relates to the technical field of metal milling devices, and discloses an indexing positioning right-angle milling head. The milling head comprises a shell, a vertical shaft, a bevel gear unit connected with the vertical shaft, a horizontal shaft which is connected with the bevel gear unit and is vertical to the vertical shaft, a vertical shaft lifting device and a vertical shaft bearing seat tightening device, wherein a vertical shaft bearing seat can rotate in a vertical shaft shell; and by the vertical shaft bearing seat tightening device, the horizontal shaft in the shell, a shaft element of the horizontal shaft and the vertical shaft bearing seat are driven to rotate through a horizontal shaft shell by taking the vertical shaft as an axis. The milling head has the advantages of high indexing accuracy of a right-angle milling head, accurate indexing accuracy, time saving and labor saving in the indexing process, high equipment rigidity and the like.

The invention discloses a stepping motor applied to automation control. The stepping motor comprises a rotor and a motor stator assembly, wherein the rotor is supported on the motor stator assembly rotatablely; the motor stator assembly comprises an outlet box and two stator sub-assemblies assembled together, and each stator sub-assembly comprises a middle polar plate, a coil block and a main case; a main case base is formed at one end of the main casing, the other end of the main case is opened, a seam allowance part coaxially arranged together with the rotating shaft of the main case is arranged at the opening end of the main case, and a notch is further formed in the opening end of the main case; a protruding part corresponding to the notch and protruding outward in the radial direction is arranged on the middle polar plate; the rotor comprises a magnet ring, a shaft and an injection molding body, wherein the injection molding body is arranged between the magnet ring and the shaft, so as to enable the rotating shaft and the magnet ring to be integrated by the injection molding body. According to the stepping motor provided by the invention, not only the shaft and the magnet ring are integrated through injection molding, but also the manufacturing accuracy of the rotor is improved, accumulated errors caused during stator assembly assembling are reduced, and the datum reference is kept to be consistent.

The invention discloses a cabin section rapid posture adjustment and tensioning device based on a six-axis platform, which belongs to the field of missile cabin section docking. In order to solve the problems of coaxiality adjustment and tensioning force application of the docking cabin section, the device includes a slewing card The ring module, the tensioning module, and the rotating snap ring module are used to fix the docking section and adjust the posture; the tensioning module applies the tensioning force evenly in the circumferential direction of the cabin to complete the precise and efficient docking of the cabin. Suitable for fast and safe docking between socket-connected missile compartments.

The invention provides a lifting mechanism combined body fixing tool which comprises a bottom plate, a left short shaft, a right short shaft and a pin shaft. The base is used for replacing an outer frame barrel section of a lifting mechanism combined body and is installed on the combined body. The left short shaft is used for replacing a left short shaft and a bearing of the lifting mechanism combined body and is in rigid connection with the lifting mechanism combined body. The right short shaft is used for replacing a right short shaft and a bearing of the lifting mechanism combined body andis in rigid connection with the lifting mechanism combined body. The pin shaft is used for replacing a left pin shaft and a right pin shaft of the lifting mechanism combined body. By means of the lifting mechanism combined body fixing tool and a precision guarantee method of the lifting mechanism combined body fixing tool, a special auxiliary tool is adopted for improving product rigidity in the mounting and debugging process, benchmark control is taken into consideration, it is ensured that the benchmark can be reasonably converted, accumulative errors are reduced, and the precision guaranteerequirement is indirectly met in a machining allowance eliminating manner. Compared with a gasket measuring and debugging method, in the lifting mechanism combined body fixing tool and the precisionguarantee method of the lifting mechanism combined body fixing tool, the coaxial error is smaller than 0.1 mm, the upper surface and lower surface parallelism is smaller than 0.05 mm, taper pin matching is achieved by 70% or higher, and the problem about guarantee of the assembly precision of the lifting mechanism combined body is effectively solved.

The invention discloses a production technology of a permanent-magnet stepper motor. The method comprises the steps of (a) preparing a rotor and a stator; (b) carrying out laminated positioning on the axial outer end surfaces of an upper middle pole plate and a lower middle pole plate in cooperation with a laminated positioning structure through the laminated positioning structure; (c) assembling corresponding coil assemblies on middle pole plate pole claw groups of the corresponding middle pole plates and connecting outlet boxes and the coil assemblies; (d) assembling an upper case on the upper middle pole plate, ensuring that the upper middle pole plate is matched in a rabbet part of the upper case and a protruding part of the upper middle pole plate is clamped in a gap of the upper case; (e) making a short-axis extension end part of the rotor pass through an upper pole claw support part, supporting the short-axis extension end part on the upper case and then assembling a lower case; and (f) welding a contact part between the axial outer end surface of an open end of the lower case and the axial outer end surface of the open end of the upper case. By the production technology, the assembly accuracy can be improved; the performance of the motor is improved; the production efficiency can be improved; and massive production is facilitated.