Method for producing oxygen-free copper conducting bar
A production method, the technology of oxygen-free copper, applied in the direction of metal extrusion control equipment, metal extrusion, manufacturing tools, etc., can solve the problems that cannot meet the needs of large motors, cannot produce high-strength oxygen-free copper guide bars, etc.
Inactive Publication Date: 2019-09-17
西安西电光电缆有限责任公司 +1
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Problems solved by technology
However, it is impossible to produce high-strength oxygen-free copper bars using the existing manufacturing process, so it cannot meet the needs of large motors
Method used
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[0030] The invention discloses a production method of an oxygen-free copper guide bar, so that a high-strength oxygen-free copper guide bar can be produced to meet the requirements of large motors.
[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0032] In a specific embodiment of the present invention, the production method of oxygen-free copper bar comprises the following steps:
[0033] S1: Cast copper rod.
[0034] S2: The copper rod is extruded by an extrusion die to form a trapezoida...
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Abstract
The invention discloses a method for producing an oxygen-free copper conducting bar. The method comprises the following steps of S1, casting a copper rod; S2, forming a trapezoidal copper bar blank through the copper rod by means of extrusion of an extrusion die, wherein the deformation amount of the copper bar blank is 28%-35%; S3, forming a copper bar transition product through the copper bar blank by means of once drawing of a drawing die, wherein the deformation amount of the copper bar transition product is 18%-23%; and S4, forming a copper bar finished product through the copper bar transition product by means of secondary drawing of the drawing die, and processing the copper bar finished product into the oxygen-free copper conducting bar, wherein the deformation amount of the copper bar finished product is 5%-8%. In the above machining process, the total deformation amount of the oxygen-free copper conducting bar is 50%-65%. According to the linear relationship between the deformation amount and the tensile strength of oxygen-free copper, it can be concluded that the tensile strength of the oxygen-free copper conducting bar is more than 300 MPa, and the demand of a large-sized motor for the oxygen-free copper bar is completely met.
Description
technical field [0001] The invention relates to the field of oxygen-free copper guide bars, more specifically, to a production method of oxygen-free copper guide bars. Background technique [0002] Oxygen-free copper bars are used to make the rotor of the motor. Large motors have higher requirements on the mechanical properties of the oxygen-free copper guide bar, and the tensile strength of the oxygen-free copper guide bar must be greater than 285MPa. However, high-strength oxygen-free copper bars cannot be produced by using the existing manufacturing process, so it cannot meet the needs of large motors. [0003] Therefore, how to design a production method of oxygen-free copper bars, so as to produce high-strength oxygen-free copper bars, is a key problem to be solved urgently by those skilled in the art. Contents of the invention [0004] The object of the present invention is to provide a production method of an oxygen-free copper guide bar, so that a high-strength o...
Claims
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IPC IPC(8): B21C23/21B21C25/02B21C31/00B21C1/16B21C3/02
CPCB21C1/16B21C3/02B21C23/21B21C25/02B21C31/00
Inventor 杨勋章郭建
Owner 西安西电光电缆有限责任公司