Metal strip steel loop set forming method and device
A technology of metal belt and steel ring group, which is applied to other manufacturing equipment/tools, manufacturing tools, etc., can solve the problems of low matching dimensional accuracy, uneven load distribution of steel belts on each layer, and low productivity of steel rings, etc., to achieve improved metal The effects of belt load capacity and service life, improvement of production efficiency, and improvement of fit accuracy
Active Publication Date: 2012-10-10
程乃士
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Problems solved by technology
[0004] The object of the present invention is to provide a method and device for forming a metal strip steel ring group, which solves the problems in the prior art such as low productivity and uneven load distribution of steel strips on each layer caused by low precision of steel ring matching dimensions.
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Embodiment 1
[0027] In this embodiment, the metal strip ring material is high-nickel maraging steel, the metal strip ring group 6 is 10 groups, and the die 9 with radial opening is made of stainless steel, and its coefficient of linear expansion is greater than 13×10 -6 / K, the temperature of the aging treatment is 480°C, and the temperature is kept for 4 hours.
[0028] In this embodiment, the load non-uniformity coefficient of each layer of the obtained metal strip ring is 6%.
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Abstract
The invention relates to the field of automobile metal strip-type continuously variable transmissions, and in particular relates to a metal strip steel loop set forming method and a metal strip steel loop set forming device, aiming at solving the problems of nonuniform load distribution of each layer of steel strip during the operation and the like in the prior art. The metal strip steel loop set is mainly used as a power transmission device among strip wheels of a continuously variable transmission of a motor vehicle; after a strip material with the width greater than the width of the steel loop by two times above is rolled into a cylindrical shape, the strip material is welded into an enclosed loop; in welding, the side surface of the welding line is connected with a sheet-shaped welding auxiliary device; after welding, the enclosed loop is rolled into the required thickness and diameter; a metal enclosed loop flexible element consists of thin-wall high-nickel-alloy steel loops which are embedded in multiple layers; a group of multi-layer steel loops are simultaneously installed on a circumference surface of a plate-shaped device; and heat treatment is carried out at 460-520 DEG C for 1.5 hours. According to the invention, during arc surface forming, errors generated in the rolling process are eliminated further, and the match accuracy is improved, thereby being favorable for improving the bearing capability and prolonging the service life.
Description
technical field [0001] The invention relates to the field of metal belt type continuously variable transmissions for automobiles, in particular to a method and device for forming a metal strip steel ring group, and the metal strip steel ring group is mainly used as a power transmission device between pulleys in a motor vehicle continuously variable transmission . Background technique [0002] In the current automotive metal belt type continuously variable transmission, the metal belt is its core transmission element, and the metal belt steel ring group is the tensioning element of the metal belt. The steel ring group is formed by stacking and nesting multiple layers of steel rings, and due to functional requirements, its axial section shape is a specific arc. [0003] A piece of equal-width metal strip (usually high-nickel alloy steel) is rolled into a cylinder, the butt joints are welded to form a closed steel cylinder, cut into several steel rings according to the require...
Claims
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Inventor 程乃士程越
Owner 程乃士