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The forging blank can be placed in the state of the mold. And with a long shot bar, there is no denying that there are certain drawbacks. However, because of the great force in the forging process, a large number of spacers are used, and the inner sleeves in the lower ring are relatively large. In order to simplify the mold structure, such a long rod is used. Based on the existence of such defects, I have provided another solution, using two short dry materials, thus avoiding the strength problem of a long shot bar, suitable for mass production, large into a coefficient straight tooth The spur gear precision forging die consists of the upper module, the lower module and the upper and lower rings.
The upper and lower rings are bolted to the lower die holder and can float up and down along the guide post and limit the upward position of the upward float by the pressure plate. The female mold adopts a pre-stressed combined die structure, and the inner layer with internal teeth is matched with the lower module with external teeth. Before the mold is closed, the depth of the cavity formed by the inner die and the lower module is greater than the height of the forging blank. When working, the forging blank is placed in the concave mold, the upper mold is descended with the press slider, and the upper module is first closed with the upper end surface of the inner layer concave mold to form a closed mold cavity. As the upper mold continues to descend, the floating die is pushed down, the height of the closed cavity is reduced, and the forging blank is pressed and deformed until it fills the cavity. Then, the upper mold goes up with the press slider, and the floating mold floats up to its upper limit position. The ejector system passes the ejector rod and pushes the lower module to push the precision forging piece out of the concave mold. The gear tooth surface produced by the mold still has a machining allowance of 0.12 to 0.25 mm, and the tooth surface precision can be improved by the subsequent cold pushing process.
The parts of the working part of the working part mainly have a punch and a die. The design points of the punch are as follows: the degree is as short as possible, so that the elastic deformation generated during the extrusion is as small as possible. The cross-section change is partially overfilled and there is no large cross-sectional area change. The mounting plane of the punch is perpendicular to the machining axis. The rounded corners and slope of the front end of the punch forming portion are larger for parts that are more difficult to form. The punches with larger diameter differences are combined as much as possible, and the parts of simple shape are combined into a punch. The overall execution of the main program flow chart system In fact, the software is always integrated with software to build a single-chip experimental platform, to observe the interactive work process and effect of hardware and software at any time. Conclusion As an excellent EDA software, the software can make students independent of the fixed hardware resources of the experimental box, independently design and debug their own systems outside the classroom, greatly improving the students' hands-on ability and technical application ability. In recent years, software has also been used more and more widely in related curriculum design, graduation design, and national undergraduate electronic design competition. Mold manufacturing and heat treatment process For roughing of forging die, it is best not to make the surface roughness. When roughing, it is necessary to reserve a reasonable machining allowance for finishing. Because the remaining margin is too small, the residual amount may be insufficient due to heat treatment deformation; If the remaining amount is too large, the processing difficulty after quenching is increased.
The roughness of the concave model cavity directly affects the life of the forging die, and it has strong anti-seizure and anti-fatigue ability, and the surface roughness is generally required. The tool marks and wear marks left during the machining of the cavity surface during turning are stress-concentrated parts, and are also sources of early cracks and fatigue cracks. Through this article, you can understand the entire process of general factory mold design. Understand the basic formwork structure, as well as the general structure of some cold forging die working parts, the general cold forging die assembly process, which provides a basic rational understanding of the future mold design, cold forging die design requirements for the workers master Installation, in short, mold design hopes to be human. This will greatly help the future mold design.