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Unsymmetrical-cross section special-shaped line production machining technique for bicycle transmissions

A processing technology and transmission technology, applied in the direction of wire drawing die, etc., to achieve high precision, good dimensional stability, and good surface lubricity

Inactive Publication Date: 2017-05-31
DONGGUAN KELEE STEEL WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the face of more and more new products, the traditional round wire drawing and simple special-shaped wire can no longer meet the increasingly rich product design and market demand

Method used

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  • Unsymmetrical-cross section special-shaped line production machining technique for bicycle transmissions
  • Unsymmetrical-cross section special-shaped line production machining technique for bicycle transmissions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A process for producing and processing a cross-section asymmetric profiled wire for a bicycle transmission, comprising the following steps:

[0021] (1) Material selection: The material of the model SCM415 produced abroad is selected as the base material.

[0022] (2) Molding: Using the technology of roller drawing + die drawing, first use the roller drawing technology to produce semi-finished products, and then use the die drawing technology to determine the final finished product. The roller drawing speed is controlled at 0.8m / s, and the die drawing speed is controlled at 2.0 m / s, and the working taper of the drawing die used for die drawing is 8°, the length of the sizing belt is 3mm, and the rounded corner of the die is 0.1mm.

Embodiment 2

[0024] A process for producing and processing a cross-section asymmetric profiled wire for a bicycle transmission, comprising the following steps:

[0025] (1) Material selection: The material of the model SCM415 produced abroad is selected as the base material.

[0026] (2) Molding: Using the technology of roller drawing + die drawing, first use the roller drawing technology to produce semi-finished products, and then use the die drawing technology to determine the final finished product. The roller drawing speed is controlled at 1.0m / s, and the die drawing speed is controlled at 2.4 m / s, and the working taper of the drawing die used for die drawing is 8°, the length of the sizing belt is 3mm, and the rounded corner of the die is 0.1mm.

Embodiment 3

[0028] A process for producing and processing a cross-section asymmetric profiled wire for a bicycle transmission, comprising the following steps:

[0029] (1) Material selection: The material of the model SCM415 produced abroad is selected as the base material.

[0030] (2) Forming: Using the technology of roller drawing + die drawing, first use the roller drawing technology to produce semi-finished products, and then use the die drawing technology to determine the final finished product. The roller drawing speed is controlled at 1.2m / s, and the die drawing speed is controlled at 1.8 m / s, and the working taper of the drawing die used for die drawing is 8°, the length of the sizing belt is 3mm, and the rounded corner of the die is 0.1mm.

[0031] The products obtained after the above-mentioned various embodiments are processed for tolerance, sharp corner radius and hardness inspection. The inspection methods for tolerance, sharp corner radius and hardness are existing mature t...

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Abstract

The invention discloses an unsymmetrical-cross section special-shaped line production machining technique for bicycle transmissions. The technique comprises the following steps: (1) materials are selected, wherein a material with the model of SCM415 which is produced abroad is selected as a base material; (2), moulding is performed; a technique combining roller drawing and mould drawing is used; firstly a roller drawing technique is used for producing a semi-product; then a mould drawing technique is used for determining a final finished product; roller drawing speed is controlled to be 0.8-1.2 m / s; and mould drawing speed is controlled to be 1.8-2.4 m / s. After being processed with the technique, the special-shaped line product has higher precision, is good in size stability, and is basically fluctuation-free; the special-shaped line product is good in surface lubrication, so that the moulding requirement of a customer is met, and subsequent machining requirement of the customer is met; and the special-shaped line product is good in linearity and is twisting-free. According to the above indexes, the properties of the product are obviously superior to similar products in a current market; the unsymmetrical-cross section special-shaped line production machining technique can be well applied to the bicycle transmissions, has a good market prospect, and can create considerable economic benefit for a company.

Description

technical field [0001] The invention relates to the technology in the field of wire rod production and processing, in particular to a production and processing process for a special-shaped wire with an asymmetric cross-section for a bicycle transmission. Background technique [0002] Bicycles, also known as bicycles or bicycles, were introduced into China from Western countries, usually small land vehicles with two wheels. Bicycles are all over the world now, entering every household, and are the most common means of transportation for people. After a person rides on the car, it is powered by pedals, which is a green and environmentally friendly means of transportation. Along with people's demand in aspects such as body-building, leisure constantly strengthens, bicycle will still continue to be the means of transportation and leisure and entertainment that people like to go out in the 21st century. It is expected that for a long period of time in the future, the demand of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/02B21C3/02B21C1/12
CPCB21C1/02B21C1/12B21C3/02
Inventor 王斯华郝小龙
Owner DONGGUAN KELEE STEEL WIRE
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