Method for manufacturing cylinder with circumferential inner reinforcing rib

Abstract

In order to overcome the deficiencies of the prior art, the present invention provides a method for manufacturing a cylinder with a circumferential inner reinforcing rib with high material utilizationrate, high production efficiency and good product quality. A blank partially sleeves the end of a core mold; a main shaft is driven to rotate and drives the core mold, a limiting device and the blankto rotate. Under the blocking of the limiting device and the axial pushing of a tail tip, the axial length of the blank becomes shorter, the radial thickness increases, and then a rotating wheel is controlled to close radially and press the end wall of the blank relative to the port in the rear end of the blank. Under the action of the limit action of an annular groove at the end of the core moldand the thrust of the tail tip, the port in the rear end of the blank is radially fed along with the rotating wheel to radially thicken and fill and form a radially inwardly protruding circumferential inner reinforcing rib b to control the axial movement of the rotating wheel relative to the primary cylinder. When the rotating wheel is close to make the wall thickness of the cylinder reach a preset value, the rotating wheel stops closing and keeps axially moving to make the wall thickness of the cylinder uniform, thereby obtaining a cylinder with a circumferential inner reinforcing rib.

Description

technical field [0001] The invention belongs to the technical field of precise plastic processing, and in particular relates to a method for manufacturing a cylindrical body with ringed inward reinforcing ribs. Background technique [0002] As an important resource metal, titanium alloy is relatively expensive. It has the characteristics of high specific strength, wide service temperature range (-269~600℃), corrosion resistance, non-magnetic, low damping and good high and low temperature performance, which can meet the requirements of aviation industry. With the continuous and rapid development of the national economy, China's demand for titanium alloys is increasing at a rate of 20% to 30% per year. [0003] At present, the manufacturing methods of titanium alloy thin-walled cylinders with inner ribs at one end are mainly two methods: "integral machining of forgings" and "integral machining of annular inner ribs + spinning of thin-walled cylinders". The shortcomings of the ...

AI Technical Summary

Problems solved by technology

[0003] At present, the manufacturing methods of titanium alloy thin-walled cylinders with inner ribs at one end are mainly two methods: "integral machining of forgings" and "integral machining of annular inner ribs + spinning of thin-walled cylinders". The shortcomings of the process are as follows : 1. The main technical disadvantages of using the "forging integral machining" method to obtain titanium alloy thin-walled cylindrical parts with rings facing inward at one end are: (a) a large amount of titanium is hollowed out during processing, and the material utilization rate is low; ( b) For thin-walled long cylinder parts, the overall machining process is difficult, the product accuracy is not easy to guarantee, and the processing cycle is also long; (c) the material fiber streamline is cut off, and the fatigue impact resistance is weak

2. The main process disadvantages of using the method of "integral machine adding of ring-inward ribs + thin-walled tube spinning" to obtain titanium alloy thin-walled tube parts with ring-inward ribs at one end are: (a) Although the "thin-walled tube section "Spinning" can save the length of the forging, but due to the existence of the circumferential inner ribs, it cannot save the thickness of the forging, and there are still many titanium materials that are hollowed out during processing, and the material utilization rate is relatively low; (b ) The circular inner rib section obtained by machining, the material fiber flow line is cut off, it has not been strengthened by spinning, and its fatigue impact resistance is weak

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