Machining method for bicycle reverse brake flower drum middle pipes
A processing method and bicycle technology, applied in metal processing equipment, metal processing machinery parts, manufacturing tools, etc., can solve problems such as poor hardenability and hardenability of aluminum, influence on the development of medium tube technology, and weak aging sensitivity, etc., to achieve Reduce the amount of cutting, increase the annual output, and enhance the effect of market competitiveness
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[0026] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention.
[0027] A method for processing a middle tube of a bicycle reverse brake hub, comprising the following steps;
[0028] 1) Cutting: Cut the whole high-frequency welded pipe (Q235B material) into rough blanks of equal length, and leave a certain margin;
[0029] 2) Stamping forming: place the blank in 10# lubricating oil for soaking, after soaking for a period of time, place it in a stamping mold, and use an 80-ton heavy-duty punch to cold-extrude the blank and make it into a semi-finished product. When punching, the number of punches per minute is 8 times;
[0030] 3) Machining: Place the semi-finished product in a CNC lathe, and make the finishe...
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