Production process for special-shaped silver-copper busbar and special-shaped silver-copper busbar

Abstract

The invention provides a production process for a special-shaped silver-copper busbar and the special-shaped silver-copper busbar. In the step of conducting continuous extrusion on a silver-copper alloy rod so as to manufacture a special-shaped silver-copper alloy busbar blank, a sizing belt 22 of an extrusion die 1 which is adopted is in a protruding shape, and the portion, located on the central area of the die, of the sizing belt 22 is bent outwards in the radial direction to form an arc-shaped outwards-protruding part 31. After a whole base body of the die deforms inwards through high temperature and high pressure, the inward deformation range of the central area is the maximum, and therefore the central area is designed into the arc-shaped protruding part, the size of the central area can be large than that of the two sides, the whole area of an outlet can more tend to the straight state, copper products can evenly flow in the deformation process, straightness of appearance of extruded products coming out of the outlet is ensured, and accuracy of the extruded products and uniformity of the mechanical property are ensured.

Description

technical field [0001] The invention relates to the technical field of metal material processing methods, in particular to a production process of a special-shaped silver-copper bar and the special-shaped silver-copper bar. Background technique [0002] Special-shaped silver-copper bars are more and more widely used in modern industry. The motor commutator in the prior art is generally composed of silver-copper sheets and mica sheets, and the silver-copper sheets are punched and formed by special-shaped silver-copper bars. The copper bar is in the shape of a "knife" or "wedge", that is, one end is large in the thickness direction and the other end is small. It has high requirements on conductivity, hardness and dimensional accuracy, and has a large aspect ratio, with an average aspect ratio of more than 40. , production is more difficult. [0003] At present, the United States and other countries adopt the special-shaped roll rolling method to produce special-shaped silver-...

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects of low dimensional accuracy and uneven mechanical properties of special-shaped silver-copper bars caused by the production process of special-shaped silver-copper bars in the prior art, so as to provide a method that can ensure the improvement of special-shaped silver-copper bars. The production process of anisotropic silver copper bars with high precision and uniform mechanical properties

[0008] Another technical problem to be solved by the present invention is to overcome the non-uniform melt flow rate in the production process of special-shaped silver-copper bars in the prior art when producing special-shaped silver-copper bars with a large aspect ratio, which in turn causes insufficient filling of the small head or rotten edges Technical defects, so as to provide a special-shaped silver-copper busbar production process that can ensure that the flow rate of the special-shaped silver-copper busbar with a large aspect ratio is uniform during production, and will not cause dissatisfaction with the filling of the small head or rotten edges

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