63results about How to "Quality and reliability" patented technology

The invention discloses a hot straightening forging die and a hot bending forging die for combined die forging formation. The hot straightening forging die comprises a drawing and flattening blankingimpression, a diagonal-form lock catch, a pre-forging impression, a pre-forging flash gutter, a final-forging impression and a final-forging flash gutter, and is used for obtaining hook straight semi-finished die forgings not completely meeting the final shape and dimension requirements. The hot bending forging die comprises a pre-bending impression, a final-bending impression and a single-longitudinal dual-corner combined lock catch and is used for obtaining hook die forged pieces thoroughly meeting the shape and dimension requirements. The hot straightening forging die and the hot bending forging die for combined die forging formation have the technical feasibility, quality reliability, economic rationality and using safety, and the problems of poor reliability, low form and location tolerance and dimension tolerance precision, low quality rate, high deformation force, low efficiency, short service life of the forging dies and the like of an existing combined die forging formation method including blanking on a 10-kN free forging hammer, die forging on a 20-kN die forging hammer and bending on a 3150-kN trimming press are effectively solved.

The invention discloses a combined precision die forging formation method. The combined precision die forging formation method comprises primary hot straight die forging formation and secondary hot bending die forging formation. Lifting hook straight semi-finished product die forged parts which do not meet the final shape and dimension requirements completely are obtained through a hot straight die forging technology and a hot straight forging die; and the shape and dimension requirements of the lifting hook die forged parts are completely met ultimately through a hot bending die forging formation method and a hot bending forging die. By means of the combined precision die forging formation method, the problems that an existing lifting hook combined die forging formation method for 'blankmaking on a flat die hammer of 10kN, die forging on a forging hammer of 20kN and bending on a trimming pressure machine of 3150kN' is poor in reliability, low in form and location tolerance and dimensional tolerance precision, low in qualified product rate, large in deformation force, low in forging efficiency and short in die forging service life, and the number of forged parts produced by each set of die is less than four thousands are effectively solved.