Book connection and cutting * does not hurt the mast gas frying S method Northeast Light Alloy Co., Ltd. Die Forging Factory (Harbin 150080) Yan Weiguang I plant fixed hydraulic press valve box large nut screw, due to years of unremoved rust and can not be removed, finally decided Cut off the scrap. The screw weighs 16kg, has a diameter of 90mm and a length of 320mm. It is made of 45 quenched and tempered steel. If the waste is completely cut off, the value of each screw is more than 200 yuan, and the current processing delays the production loss even more. If the nut is cut off and the screw is not damaged, the screw can be reused, which saves the mast and can be produced as soon as possible, which can save a lot of money for the country.
Difficulties in cutting and feasibility. The nut and the screw are tightly combined without gaps. The slightest incision will hurt the screw when cutting. The cutting is very difficult, but the possibility of successful cutting is not a little because there is an oxide layer between the mother and the screw. . Since the oxide layer has a certain barrier effect on the oxidative combustion of the metal, the screw will not oxidize and burn immediately when the nut is cut through. If the torch can be lifted before burning through the oxide layer, the screw will not be damaged. So master the cutting skills, cutting success is still possible.
(1) The cutting is performed twice, the first part of the thread is cut off, and the second part of the thread is cut, and the cutting direction is parallel to the direction of rotation of the ridge (see the figure below). The bolts are preferably placed vertically, the height of the nut and the eyes are flush, so that the line of sight is good, the reaction is quick when cutting, and the welding gun is flexible. When cutting to the screw oxide layer, immediately lift the torch to stop cutting. After the screw temperature is lowered, continue cutting. The cutting procedure is the same as last time, so that the cutting is repeated until all the nut threads are cut. Be careful not to raise the screw temperature too high, because the screw temperature rises too much will accelerate the burning speed of the screw thread oxide layer, burn the screw thread, and make the cutting failure.
The cutting direction of the cutting direction diagram should be sensitive and easy to use and the wind line should be long, and the cutting action is quick and sensitive.
Using this method, all the 8 nuts of the valve box of our factory were successfully cut without cutting the screw thread. The cutting of nuts has been successful many times in the past few years, and the economic benefits are remarkable. (20020718) Development trend of stamping forming technology Since the 1990s, high-tech has promoted the transformation of traditional forming technology and the formation and development of advanced forming technology. The 21st century pressure technology will continue to develop at a faster speed, and the direction of development will be more prominent. The requirements of “fine, provincial and clean†are embodied in the following aspects.
The press forming technology will be more scientific, digital and controllable.
Scientificization is mainly reflected in the prediction process and controllable procedures for the forming process, product quality, cost and benefit. The numerical simulation technique of the forming process will be greatly developed in the direction of practical use and well integrated with the digital manufacturing system. Artificial intelligence technology and intelligent control will be developed from the formation of simple-shaped parts to the formation of complex-shaped parts such as covers, and thus truly enter the practical stage.
Focus on the whole process of product manufacturing, and achieve multi-objective global comprehensive optimization. The optimization will evolve from the traditional single forming process to the whole process of product manufacturing and the whole life cycle.
C3) There will be significant developments in the rapid analysis and evaluation of product manufacturability and forming processes. In order to make a rapid analysis and evaluation of the formability of the part and the required performance guarantee from the initial design or even the conception of the product.
Stamping technology will have greater flexibility or flexibility to adapt to the future development trend of multi-varietal mixed-flow production mode and market diversification and individualized demand, and strengthen the rapid response of enterprises to market changes.
Pay attention to the development of composite forming technology. Advanced forming technology based on composite processes is not only developing from the manufacture of blanks to direct manufacturing of parts, but also from the manufacture of individual parts to the direct manufacture of structural integrity.
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