2results about How to "Does not affect shape" patented technology

The utility model discloses a button cell mounting structure of disposable dental handpiece, including handle, machine head, handle both ends are operating end and connecting end respectively, operating end is equipped with illuminating lamp, handle is inlayed and is equipped with battery compartment, battery compartment is equipped with the lid, the outer surface of lid and the outer peripheral wall of handle are smooth transition, battery compartment is equipped with button cell, battery compartment is equipped with the mouth, the mouth is long strip, the conductive sheet of battery compartment is electrically connected with illuminating lamp, machine head is connected with operating end. Button cell meets the manufacturing cost of disposable dental handpiece, compared with traditional button cell mounting mode, the button cell of the application is inlaid in handle, does not affect the original size of handle, is favorable to the operation of doctor. Secondly, the structure still does not affect the overall shape and appearance of handle, is favorable to improving the aesthetic property.

The application discloses a kind of composite processing methods of hollow rotating shaft, including rotating shaft blank using hot piercing, straightening, spheroidizing annealing, phosphorus saponification process obtains first forming piece;The right part of first forming piece is reduced in diameter;The left part of second forming piece is formed into stepped shaft;The middle part of third forming piece is formed into long key groove;Fourth forming piece is treated using spheroidizing annealing, phosphorus saponification, and the right part of fourth forming piece is formed into internal spline on the inner side;Fifth forming piece is formed into shaft shoulder;Sixth forming piece is formed into hollow rotating shaft blank using isothermal normalizing.The first through hole is formed in rotating shaft blank by hot piercing, then the material is directionally flowed in each process using cold extrusion to gradually shape the characteristics, and the second through hole, stepped shaft, long key groove, internal spline and shaft shoulder are sequentially formed, so that the shape characteristics formed in the previous process are not damaged in the subsequent process, and the integrated processing of complex shape hollow rotating shaft is realized.