Roughcast

Abstract: The invention discloses a close isothermal forging method of GH4169 alloy tray-shaped forging in the air, the technological process is that: making GH4169 finegrain roughcast adopting method of upsetting, punching and rolling after heating GH4169 alloy original rod material to 995-1005 DEG C; respectively heating the finegrain roughcast to 995-1005 DEG C and forging die to 950-965 DEG C; diefilling and positioning the finegrain roughcast; while heating finegrain roughcast and forging die to keep the heating warm humidity; forging die and forging press the finegrain roughcast forming under the 55MN to 65MN forging pressure and 0.01s-1 to 0.05s-1 strain rate; obtaining the tray-shaped forging; water-cool processing the tray-shaped forging. Adopting forging method of the invention can realize forming of the GH4169 alloy material tray-shaped forging difficult to deform and obtain the GH4169 alloy tray-shaped forging with weensy crystal grain, high intensity and complicated shape.

Abstract: The invention relates to a cold ring rolling forming method for a double-flute section ring. The method comprises the following implementation steps of: (1) preforming, namely uniformly heating a bar section to the forging temperature from room temperature; upsetting, punching and punching wad to form a ring roughcast used for ring rolling; and designing the size of the ring roughcast; (2) roll pass design; and (3) ring rolling forming by using a ring rolling machine, wherein a core roll stops feeding and a ring rolling process is finished when the outside diameter of an obtained double-flute section ring is measured to reach a predetermined value; and the ring roughcast finally forms the double-flute section ring in a predetermined size. In the method, the double-flute section ring is produced by adopting a cold ring rolling process; the double-flute section ring is formed through continuous local plastic deformation of a rectangular section ring by reasonably designing the ring roughcast, ring rolling pass and forming parameters; and therefore, the consumption of raw materials and processing time are reduced, metal streamline distribution and organization properties of the ring are improved, work efficiency and product quality are improved, and production cost is reduced.

Abstract: The present invention provides a conical gear integral cold-forging process, which belongs to the metal mechanical processing and metal punching field that is basically free from cutting, and in particular relates to a conical gear integral plastic precision forming method, which adopts the process procedures that circular steel rod material is cut and spheroidized, and then is annealed; and thenis mechanically processed to made into the roughcast to be processed for phospholeum; the axial part is correctly extruded; the rough teeth part is processed into a spherical shape; after the spheroidization annealing and phospholeum processing, the teeth is formed, and finally is squeezed into a square shape. The metal flowing wire of the product is distributed continuously according to the shape; the interior is closely configured, so that the teeth surface of the conical gear is more durable; the strength of the shaft is improved by two times or more compared with the original process. At the same time, since no material is wasted during the cold forging process from the rough material to the finished product, the method of the present invention saves materials compared with the mechanical processing process, and can reduce the energy consumption. Since the advanced tri-dimensional analog forming software is used to simulate the cold forging processing during the development of thenew product, a great amount of mould development and commissioning time is saved, and the development expense is reduced.

Abstract: Rough logic and rough sets theory are mainly devoted to analysis of incomplete, uncertain, and inconsistent data. An exploited in the article result of the theory is the so-called rough information system that gives a model for dealing with the situation in which some real objects are represented ambiguously via defined approximation (alternatives of values of the objects attributes). The proposed rough system opens a way to process such information and moreover is equipped with a powerful query language and possibility to classify real objects based on their stored rough characteristics. The implemented RoughCast system and, especially prepared for the case, knowledge base for steel casting defects form such the rough information system. They can be successfully applied in the process of knowledge integration concerning production of steel castings and, in consequence, as a tool in solving technological problems in operating foundries.