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

Pending Publication Date: 2019-08-02
泰兴市宇和五金配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hardenability and hardenability of 08 aluminum are extremely poor
The aging sensitivity is slightly weaker than that of 08F, so it is not suitable for cutting
Before the second stamping, in order to protect the mold from being damaged, it is necessary to carry out annealing treatment, and do a second pickling, phosphating and saponification treatment to protect the mold from being damaged, but with the strengthening of the national environmental protection policy, pickling and phosphating The environmental problems caused by saponification force enterprises to

Method used

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  • Machining method for bicycle reverse brake flower drum middle pipes

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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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Abstract

The invention discloses a machining method for bicycle reverse brake flower drum middle pipes. The machining method comprises the following steps of (1), blanking, specifically, a whole steel pipe iscut into blank materials with equal lengths, and a certain margin is left; (2), punch molding, specifically, the blank materials are placed into a punch mold, cold extrusion molding is performed on the blank materials utilizing a heavy type punching machine, and semi-finished products are fabricated; and (3), mechanical machining, specifically, the semi-finished products are placed into a lathe, and finished-product middle pipes are fabricated through precise lathe machining. According to the machining method for the bicycle reverse brake flower drum middle pipes, the steel pipe is adopted toreplace original round steel as the blank materials, and substantial reduction of the middle pipe machining cost is realized.

Description

technical field [0001] The invention relates to a processing method for a middle tube of a bicycle reverse brake hub. Background technique [0002] The inner tube of the bicycle reverse brake hub is an important part of the bicycle hub. It is generally a tubular part. The precision requirements of its surface and inner hole are relatively high, so it generally needs to be processed by precision numerical control to meet the demand. [0003] The existing processing technology is generally as follows; [0004] 1. Use 08 aluminum light rounds as blanks, with a diameter of 30 mm and a blanking weight of 300 to 310 grams; [0005] 2. After the blanking is completed, pickling, phosphating and saponification. Then use a 500-ton stamping machine for the first stamping; [0006] 3. Annealing, and do secondary pickling, phosphating and saponification treatment, [0007] 4. The second stamping; [0008] 5. Stamping for the third time, and punch out the inner hole; [0009] 6. CNC...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23Q11/10
CPCB23P15/00B23Q11/1007
Inventor 高谨高建明
Owner 泰兴市宇和五金配件有限公司
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