JPS59166332A - Manufacture of cylinder - Google Patents

Abstract

PURPOSE:To facilitate manufacture of a covered thin-walled cylinder and to improve the yield by making two bottomed drawn cylinders from a plate, butt- welding the cylindrical parts, and cutting both ends to make upper and lower covers. CONSTITUTION:A flat plate is cut round to make a flat disk 11. This is drawn to obtain a formed product 12. This is cut into a bottom part and cylindrical part and worked to two sets of cylindrical parts 13 and bottom parts 14. Two cylindrical parts 13 are joined by electron beam or laser beam welding. This joined part is homogenized by heat treatment as a welded product 15 to obtain a cylindrical material. The bottom part 14 is pressed and machined and internal parts are assembled to obtain an lower cover assembly 19 and an upper cover assembly 20. Then, the thin-walled cylindrical material is made to a cylindrical worked product 16 by primary spinning, and after solution heat treatment, a cylindrical double spinning worked product 17 is made by secondary spinning. This product is subjected to bellows working to obtain a cylindrical bellows formed product 18. The upper and lower cover assemblies 19, 20 are welded to the formed product 18 to make an upper and lower cover welded product 21 and age-hardened to obtain a covered cylinder.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] Relating to a cylindrical structure having lids at both ends, the lid is thicker than the cylindrical part, and high-precision metal construction in which internal structures are incorporated into the lid. The present invention relates to a method for manufacturing a cylinder with a lid, which is suitable for a long cylinder.

[Prior art]

A conventional cylinder with a lid may be molded in one piece as shown in FIG. 1, or the cylindrical portion and the lid may be manufactured separately as shown in FIG. Figure 1 is applicable to small parts, such as lids, that do not have any built-in parts inside, and cannot be used for large parts or parts that have built-in parts inside. Therefore, generally, the construction method shown in FIG. 2 is adopted, in which the cylindrical member and the lid member are processed from different materials and then joined together. For this reason, when the cylindrical material 3 becomes a high-quality material such as maraging material, it has to be manufactured by forging and cutting, which has the drawback of poor material yield and high processing costs.

[Purpose of the invention]

To provide an inexpensive, thin-walled cylinder with a lid, which can be easily manufactured with a high yield from plate material, and has an ultra-high strength for maraging, etc.

[Summary of the invention]

In a cylinder with lids at both ends, both the cylinder and the lid are made from unique boards, simplifying the work. In addition, by using two drawing cylinders and butt welding the cylindrical parts, the drawing depth is halved, reducing the size of the blank and the shape of the drawn product, improving equipment and work efficiency. At the same time, two pieces of rice will come out on the bottom plate and on the lids on both sides. The present invention
There is no problem with reliability due to the bath welding of the central part, as the properties of the material are completely improved by homogenization treatment after welding, spinning, solution treatment, and reshining.

[Embodiments of the invention]

A work process diagram of an embodiment of the present invention is shown in FIG.

This is a thin-walled cylinder whose thickness is 1/6 of the thickness of the lid, 10 times the diameter of the cylinder, and a lid at both ends. An example of a high-speed rotating body with . - Also, the material is high strength steel such as maraging steel.

First, a flat plate is cut into circles to make 11, and by press processing, it is drawn and formed (two-step drawing) to make 12.
Cut and process the bottom part and the cylindrical part to make two sets each of 13 and 14. These two cylindrical parts are joined by electron beam or laser beam bath contact to form 15. By subjecting this to homogenization heat treatment at a temperature that completely converts it into a solid solution, the weld structure is homogenized. %, energy concentration, electron beam welding, and laser welding have excellent tissue quality. This is used as the material for the thin inner cylinder. On the other hand, 14 is pressed and cut, and the internal components are assembled.
A lower lid 19 and an upper lid 2o are provided.

By making the cylinder and both lids from a single board in this way, the work is simplified and mass production becomes easier.

In addition, compared to drawing with - pieces, the surface area of the blank is approximately 1,000 times smaller and the drawing depth is half, so drawing is very easy. Cost and thickness increase due to shrinkage flanges are small, and no scratches occur due to ironing.

Next, the homogenized thin-walled cylindrical material is subjected to primary spinning, given a processing degree of 25% to 70%, and 16 is made. After solution treatment, this is subjected to second spinning,
Give a working degree of 0 to 80% and make 17'fc. This improves the structure of the base metal as well as the structure of the welded part, resulting in a highly reliable cylinder. Form a bellows on this to make 18. At this time, the bellows is molded to avoid the bath contact part, and as a precaution, the part of the bellows with the highest stress is avoided from the bath contact part to further ensure reliability. Next, weld 19 and 20 to 18,
By making the cylinder 21, subjecting it to age hardening treatment, and manufacturing the cylinder 41, it is possible to manufacture a cylinder with a lid at a lower cost than in the past.

It is also possible to maintain sufficient reliability regarding the strength of the cylinder.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a conventional integrally molded cylinder, FIG. 2 is a process explanatory diagram of conventional split manufacturing, and FIG. 3 is a detailed explanatory diagram of the present invention. 1... Integral cylinder with lid, 2... Disc material (left), 3...
... Cylindrical material, 4... Disc material (right), 5... Lid (
left), 6...thin cylinder, 7...lid (right), 8...
・Cylinder with lid, 11... Flat disc, 12... Drawn product, 13... Drawn product cylindrical part, 14... Drawn product bottom,
15... Cylindrical welded product, 16... Cylindrical spinning processed product, 17... Cylindrical part spinning processed product, 18... Cylindrical bellow molded product, 19... Underwear processed assembly product, 20...
・High price processed assembled product, 21... Upper and lower lid welded product.

Claims (1)

[Scope of Claims] 1. When making a whole cylinder with lids on both ends km, make a cup-shaped drawn υ product with a bottom from a flat plate, and make a long cylinder by butt welding the drawn cylinders together, and use this for the thin inner cylinder. As a material,
The manufacturing method of the cylinder is characterized in that the bottom part is used as the material for the lid at the end, and after each processing, the cylindrical part and both lid parts are again bath welded to form a cylinder with lids at both ends. 2. A method for manufacturing a cylinder according to claim 1, characterized in that the processing of the cylindrical portion comprises steps including homogenization, spinning, solution treatment, re-spinning, and bellows forming. 3. In claim 1, the method for manufacturing the cylinder is characterized in that the cylinders are welded together by electron beam bath tangent or laser welding, and the structure is such that the bath tangent does not become a bellows forming part. .