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Design of warming forming technology for gear forgings

Edit: Jingjiang Jinlun Machine Manufacturing Co.,Ltd    Date: Aug 03, 2017

Design of Warming Forming Technology for Gear Forgings
Based on the principle of warm extrusion technology, the Forgings analysis and the temperature extrusion process of complex shape gear Forgingss are analyzed, and the complex shape gear Forgings is described in this paper. In this paper, Process design in the difficult and key points, combined with the actual production, developed for the actual production of the temperature extrusion process. Designed a set of economical and practical temperature extrusion molding die, also introduced the mold structure and the principle of the workpiece. The mass production trial proved that the temperature extrusion molding process for the production of gear Forgings quality is stable, convex full, and the mold structure is reasonable, versatile, high production efficiency. Gear is the machinery industry is widely used, the performance requirements of the higher transmission parts, most of the need for Forgings blanks. Among them, some of the complex shape, the end with a bump and has a part of the non-mating surface can be less cutting to meet the requirements of the gear Forgingss, die Forgings process design is a technical difficulty. In general, due to the complex geometric shape of the Forgingss, the traditional hot Forgings method is easy to produce Forgings defects, it is difficult to meet its quality requirements, and the use of temperature extrusion process technology is one of the technical difficulties to solve its technical difficulties. Warm extrusion is hot extrusion, is based on the cold extrusion process developed a few less cutting process, the deformation temperature is generally above room temperature to the hot extrusion temperature below the range. Warm extrusion technology to a certain extent, both the advantages of cold and hot extrusion, but also reduce their respective shortcomings. Since the metal is heated and squeezed in a higher temperature range, it is possible to omit the auxiliary process such as pre-annealing and phosphating in the process, thereby reducing the problem of environmental pollution due to the phosphating treatment. Moreover, because the deformation of the blank than the cold when the small, the mold life can also be higher than the cold extrusion. Compared with the hot extrusion, but also overcome the strong oxidation due to reduce product surface quality problems, so the product size and mechanical properties are better than hot extrusion.
 In the module, there are discontinuous, convex shape of the Forgings, after the multi-fire sub-die Forgings treatment, by the operation of the beat and punching edge and other factors, die Forgings parts will usually occur in varying degrees of deformation. In the next fire Forgings, as the upper hammering center is the same as this fire, the formed bosses can not be all placed in the upper mold cavity, and at the edge of a die Forgings Resulting in folding phenomenon, and the more measures, the higher the incidence of folding, the more serious the degree. Therefore, in the process of Forgings Forgings, should minimize the fire, as far as possible to do a fire molding.
 Under normal circumstances, the use of mold temperature of 250 ℃. In the process of multi-fire production, Forgings the fire between the repair temperature for room temperature. And in the next fire before the production, you need to re-install the mold, heating, removal and other treatment, the last fire with the fire after the treatment of the mold center is usually not completely coincide. The Forgings boss in the upper mold cavity can not be fully inserted into the upper mold cavity, which can cause the side of the deviation to collapse. The occurrence of this folding phenomenon is similar to that caused by the deformation of the Forgings, but the reason of the two is completely different. The main method is to minimize the number of die Forgings to realize the improvement of the technological level.

Jingjiang Jinlun Machine Manufacturing Co.,Ltd