Aluminum alloy itself is relatively light and its strength is not as high as that of steel, but it is still good. Commonly used aluminum alloys on bicycles are 7005 aluminum and 606 1 aluminum. The strength of 7005 aluminum is higher than that of 606 1 aluminum, but it is also heavier. In order to pursue as light as possible, it is particularly important to solve the contradiction between weight and strength. Manufacturers of big brands have also invested a lot of energy in research and development, and used many unique technologies to achieve the unity of strength and light weight, such as trapezoidal tubes, such as double circular tubes. In this way, the lightweight 6000 series aluminum can achieve the strength that only 7000 series aluminum can achieve in the traditional process. As far as Merida is concerned, it is mainly TFS and HFS technology.
TFS frames commonly used in Merida Challenger series are generally 16 and 18. TFS is the abbreviation of Hydroforming, and its English name is Techo Forming System. It adopts 3D special molding technology, which belongs to Merida's unique patented technology. In other words, it is modeled after HFS and made by a relatively simple process, which looks like a HFS frame.
HFS framework is a real technology; Unique; Merida frame that can really compete with other brands. HFS is the abbreviation of hydroforming system, that is, using the special hydroforming technology of hydroforming system, Merida carved beautiful 3D lines on the aluminum alloy frame tube of 6066 prolite, which reduced the frame to an incredible extent (18 "frame is about 1.4kg), but at the same time maintained Merida's consistent characteristics: super high rigidity.
The so-called hydroforming technology of pipe fittings is suitable for pipes with different thicknesses and irregular hollow structures. As the name implies, firstly, the pipe is put into the molding die, and then the pipe is pressed into the mold cavity for molding by adding high-pressure fluid (mainly water at present) into the pipe and cooperating with axial pressure compensation.
Using this technology, the tube wall of HFS frame can be made thinner, thus reducing weight and improving strength. However, due to expensive equipment and high rejection rate, the cost of HFS frames remains high. Summary: HFS top aluminum frame ~ ~ ~ Merida
The new ultra-light HFS hydroformed frame adopts the highest manufacturing technology of Merida aluminum alloy frame.
The frame is all made of high-strength lightweight hydraulic pipes, and the welded joint between the upper pipe and the head pipe is made of Merida LOGO with hydraulic relief design.
The upper and lower tubes of the front triangle are butterfly hydraulic straws exclusively patented by Merida, and the rear triangle is also a light straw.
The FSA adopts the latest Merida seat pipe clamp, and has a built-in Pei Lin bowl set. The measured frame is 1427g(26x 16 inch), which is nearly 80g lighter than the Giants 08 XTC team.
To put it bluntly, TFS is equivalent to the giant's XTC team.
HFS is equivalent to ATX team, the predecessor of giant XTCTEAM. ...
But they are much stronger than the giant's XTC team.
Pro is not a production process, but a model of a giant frame.