Spinning thickening method of cylinder wall of cylindrical part

Abstract

The invention discloses a spinning thickening method of the cylinder wall of a cylindrical part. The spinning thickening method comprises the steps of firstly placing a to-be-thickened cylindrical prefabricated part on a lower main shaft of a spinning machine, and clamping the cylindrical prefabricated part through an upper inner main shaft and the lower main shaft of the spinning machine; then, lowering an upper outer main shaft mounted at the outer part of the upper inner main shaft in a sleeving manner, compressing the cylinder wall of the cylindrical prefabricated part, and fixing; then, rotating the upper inner main shaft, the upper outer main shaft, the cylindrical prefabricated part and the lower main shaft together, and feeding cylindrical rolling wheels in the radial direction of the cylindrical prefabricated part; repeating the steps, so as to achieve N-pass thickening for the cylinder wall of the cylindrical prefabricated part to prepare the cylindrical part. According to the spinning thickening method, the cylinder wall of the cylindrical part is gradually thickened through multi-pass spinning, the forming problem of the cylindrical part of which the cylinder wall is thicker than the cylinder bottom is solved, and the method is suitable for forming of the cylindrical part of which the diameter is relatively large, the cylinder wall is not high, and the cylinder wall is thicker than the cylinder bottom.

Description

technical field [0001] The invention belongs to the technical field of thickening by spinning, and more particularly relates to a thickening method for a cylinder wall by spinning. Background technique [0002] Spinning is a process for forming metal hollow rotary parts. It is widely used in forming rotary cylindrical parts, tubular parts or disc-shaped parts. The process is that the blank rotates with the mold or the spinning tool rotates around the blank. In , the spinning tool is fed against the blank so that the blank is compressed and undergoes continuous, point-by-point deformation. Spinning includes ordinary spinning and thinning spinning. In spinning products, especially in spinning tooth discs or sprocket products, edge thickening is often required, and products that meet the conditions can be obtained by spinning edge thickening. [0003] In the prior art, there has been some research on the spinning thickening technology, such as WO9622847A, US6925713B and CN1144...

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Problems solved by technology

[0003] In the prior art, there has been some research on the spinning thickening technology, such as WO9622847A, US6925713B and CN1144497A disclose a method for spinning thickening using a V-shaped groove rolling wheel. The edge of the sheet metal is spun and thickened into a V shape. As the number of spinning passes increases, the opening angle of the V-shaped groove becomes larger and larger, and finally it is spun into a rectangle; Spinning, when changing from a V shape to a rectangle, if the blank is too small, it is easy to cause the outer side of the rim to be filled insufficiently, thus forming a waste product. If the blanking is too large, the radial force of the spinning will be too large, which will increase the spindle’s capacity. Bearing requirements accelerate the wear of the main shaft, so the blanking is harsh, and there are many requirements for the shape of the rolling wheel

Another example is CN102009112B, which discloses a method for thickening the annular outer edge of a circular sheet metal. N rolling wheels with rectangular openings are arranged on the outer edge of the circular sheet material. After forming, the shape and size of the outer edge of the sheet metal are determined by the rolling wheel The rectangular opening is determined, so this method has special requirements for the shape and size of the rolling wheel, and the rectangular opening of the rolling wheel needs to be specially designed according to the shape and size of the outer edge of the sheet metal. The forming is more complicated and the equipment cost is high.

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