Forming method and forming tool for hinge plate parts

Abstract

The invention discloses a forming method for hinge plate parts. According to the forming method disclosed by the invention, a U-bending process is added on the basis of a traditional hinge plate connecting hole forming process so as to realize rapid and accurate forming of hinge plate connecting holes. The forming method disclosed by the invention is especially suitable for processing the hinge plate parts of which the draw ratio L / d is not smaller than 30, and has the advantages that the structure is simple, part positioning is reliable, part pickup is convenient, and bending-buckling generated due to the fact that the material is thin and longer during edge rolling forming is avoided; meanwhile, other kinds of mechanical damage are also avoided; moreover, the structural universality is good, and as long as required hinge plate holes are consistent in diameter, the hinge plate holes of various specifications (lengths) can be finished by using one set of molds, and therefore, the number of the molds is greatly reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to a forming method and forming tooling of a hinge part, which belong to the technical field of mechanical part production. Background technique [0002] as attached Figure 4 The hinge piece shown (HB2-20-2002) belongs to the hinge parts, which is suitable for the non-load bearing hinge used for the movable connection of the cover and the plate. It is mainly used in the fields of aviation, aerospace and ships. The plate is connected flexibly. Therefore, the structural shape and size of the parts are strictly required. The material is 2A12-O (LY12-M), 30CrMnSiA, and the thickness is 0.5, 0.8, 1.0, 1.2, 1.5. There are many specifications, and the surface of the parts is different. There should be dents, scratches, burrs and other mechanical damage. For the hinge (hinge) parts, according to the current relevant information, the head of the blank is usually pre-bent before rolling. There are two structural functions of the existing r...

AI Technical Summary

Problems solved by technology

[0002] as attached Figure 4 The hinge piece shown (HB2-20-2002) belongs to the hinge parts, which is suitable for the non-load bearing hinge used for the movable connection of the cover and the plate. It is mainly used in the fields of aviation, aerospace and ships. The plate is connected flexibly. Therefore, the structural shape and size of the parts are strictly required. The material is 2A12-O (LY12-M), 30CrMnSiA, and the thickness is 0.5, 0.8, 1.0, 1.2, 1.5. There are many specifications, and the surface of the parts is different. There should be dents, scratches, burrs and other mechanical damage. For the hinge (hinge) parts, according to the current relevant information, the head of the blank is usually pre-bent before rolling. There are two structural functions of the existing rolling die. The principle is to use the push circle method, which is relatively simple in structure and easy to manufacture molds, but this method has certain limitations. For parts with a length-to-diameter ratio of L / d≥30, the material is thinner and the parts are bent and rolled during forming. When it is round, it is easy to lose stability, the quality of the bent part is poor, the size and roundness of the hole are not easy to control, the scrap rate is high, and even the bending and rounding fail, the production is difficult, the shape cannot be formed, and the product quality and batch production requirements cannot be met and adapted. The other is to use the inclined wedge to act on the concave die to roll round in the horizontal direction. There is a pressing device, and the quality of the bent parts is better, but the mold structure is more complicated. For hinges with many specifications, many molds are required, and the mold manufacturing cost Big, long cycle, difficult to debug, unable to meet customer needs and batch production requirements

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