SU1486245A1 - Method of producing helices of coiled magnetic core - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to the manufacture of spiral products, and m. used in electrical engineering and other areas of technology. Purpose - increase

The invention relates to the processing of metals by pressure, in particular to the manufacture of spiral products.

The aim of the invention is to improve the accuracy of manufacturing a spiral by ensuring the constancy of the radius of its curvature when changing the thickness of the original piece.

The drawing shows the manufacturing scheme of the spiral of a twisted magnetic circuit.

The original billet 1 is rolled with a given compression angle a in a trapezoidal caliber formed by rolls 2 and 3, the axes Οι and Og of which are located in one plane, with a constant force R. The degree of deformation of the billet 1 is variable in width forming a spiral.

Since the thickness of the original billet 1 has fluctuations in size within the tolerance from a to a "ax, at a constant value of the compression angle, the resulting helix

2

precision manufacturing spiral. To do this, the initial billet is rolled with a given compression angle in the trapezoidal caliber formed by the rollers, with a constant force. The axis of the rolls are located in the same plane. The degree of deformation is variable across the width of the workpiece, as a result of which the workpiece is bent on the edge, forming a spiral. When varying the thickness of the original billet, the reduction angle is changed in accordance with the change in its thickness by rotating one of the rolls about an axis passing through the top of the reduction angle perpendicular to the plane of the axes of the rolls. EFFECT: obtaining spirals of twisted magnetic cores with a constant radius of curvature regardless of fluctuations in the thickness of the original billet. 1 il.

has a variable radius of curvature, which is unacceptable for products of responsible purpose. Therefore, in the process of rolling, the reduction angle a is changed in accordance with the change in the thickness of the original billet in the range from a to amax by turning one of the rolls 3 around the axis O passing through the top of the reduction angle perpendicular to the plane of the axes of the rolls.

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For rolling a helix, the rolls can be either conical or cylindrical. Axial displacement of the original billet can be prevented by using guides, fixed or moving (rotating).

The proposed method can produce spirals from a solid original billet, or from a billet with cut grooves. The application of the proposed method provides for obtaining spirals of twisted magnetic cores with a constant radius of curvature

3

visas regardless of fluctuations in the thickness of the original billet.

Claims (1)

Claim A method of manufacturing spirals of a twisted magnetic core, in which the initial billet is rolled with a given compression angle in a trapezoidal caliber formed by rollers, whose axes are located in the same plane, while constantly acting 1486245 four with a variable width of the workpiece degree of deformation, characterized in that, with the aim of improving the accuracy of production of the spiral by ensuring the constancy of the radius of its curvature when ⁵ changing the thickness of the original billet, the reduction angle is changed in accordance with the change in the thickness of the original billet by turning one of the rolls around an axis passing through the top of the angle of crushing perpendicular to the plane of the axes of the rolls.