CN102773673A

CN102773673A - Ring rolling forming process of square-exterior circular-interior forge piece

Info

Publication number: CN102773673A
Application number: CN2012102844176A
Authority: CN
Inventors: 万东海; 张令; 洪大钧; 张自生; 林良培; 赵晓光
Original assignee: Guizhou Aerospace Xinli Casting and Forging Co Ltd
Current assignee: Guizhou Aerospace Xinli Casting and Forging Co Ltd
Priority date: 2012-08-11
Filing date: 2012-08-11
Publication date: 2012-11-14

Abstract

The invention provides a ring rolling forming process of a square-exterior circular-interior forge piece. The ring rolling forming process comprises the following steps that a square-exterior circular-interior mould which is preheated to 300-400 DEG C is sleeved on a core roller of a numerical control ring rolling machine; a manufactured circular-exterior circular-interior blank is arranged in the square-exterior circular-interior mould; the numerical control ring rolling machine is started to position the square-exterior circular-interior mould and the circular-exterior circular-interio blank so that the wall thickness of the square-exterior circular-interior forge piece is reduced to a predetermined size finally, and the work automatically stops; the numerical control grinding ring machine stops and the square-exterior circular-interior forge piece is taken out; after the square-exterior circular-interior forge piece is subjected to a normalizing heat treatment of 880-920 DEG C for carrying out mechanical machining after being cooled, so that a square-exterior circular-interior part is obtained. A metal flow line of the forge piece is not cut off, and the forge piece has the advantages of uniform structure, grain refinement, strong comprehensiveness, high forge piece quality, less cutting quantity of mechanical machining operation, material saving, high production efficiency, and long service life.

Description

The looping mill rolling moulding process of square-outside and round-inside die forging spare

Technical field

The invention belongs to the forging technology field, particularly a kind of looping mill rolling moulding process of square-outside and round-inside die forging spare.

Background technology

Square-outside and round-inside die forging spare, its shape are foreign side, interior circle.Conventional forging method has two kinds, and a kind of is that blank is forged in the cylindrical after the circle, and the method through machining finally is processed into square-outside and round-inside shape parts with it again; Another kind is after blank is forged into box-shaped, and the method through machining finally is processed into square-outside and round-inside shape parts with it again.

Described two kinds of methods, both consumptive materials, and because of machining time longer, inefficiency, in the machining since the metal streamline of material all be cut off, thereby the combination property and the service life of having reduced square-outside and round-inside shape parts.

Summary of the invention

The object of the invention; Be to adopt the problem of conventional method making existence to square-outside and round-inside die forging spare in sum; Provide a kind of square-outside and round-inside shape parts of making to economize material, high efficiency is not cut off metal streamline; Combination property is strong, the looping mill rolling moulding process of the square-outside and round-inside die forging spare of long service life.

The ring of square-outside and round-inside die forging spare of the present invention is bundled into type technology, at first bar is heated to 1150～1180 ℃, is forged into circular blank in the cylindrical through jumping-up, punching, reaming operation, and inserts heating in 1150～1180 ℃ of stoves.

The round outside but spuare inside shape mould of 300～400 ℃ of preheatings is placed on the core roller of numerical control ring rolls, again circular blank in the cylindrical is placed round outside but spuare inside shape mould.Start the numerical control ring rolls; With circular blank location in round outside but spuare inside shape mould, the cylindrical; The core roller of numerical control ring rolls radially moves towards home roll; Home roll then drives round outside but spuare inside shape mould by 2mm/s～10mm/s speeds of setting, and applies 500～4200kN power by setting, causes wall thickness reduction to the preliminary dimension of square-outside and round-inside die forging spare promptly to quit work automatically.Close the numerical control ring rolls, take out square-outside and round-inside die forging spare, after 880～920 ℃ normalizing is heat-treated to cooling, carry out machining again, promptly obtain square-outside and round-inside shape parts.

The ring of square-outside and round-inside die forging spare of the present invention is bundled into type technology, and the forging that on the numerical control ring rolls, carries out the looping mill rolling moulding by round outside but spuare inside shape mould is not cut off metal streamline, even tissue; Grain refinement; Combination property is strong, and forging quality is high, and its machining cutting output is few, province's material; Production efficiency is high, long service life.

Description of drawings

Fig. 1 is that overlook (signal) that the ring of this bright square-outside and round-inside die forging spare is bundled into circular blank in the cylindrical of type technology schemed;

Fig. 2 is that overlook (signal) that the ring of this bright square-outside and round-inside die forging spare is bundled into the round outside but spuare inside shape mould of type technology schemed;

Fig. 3 is that overlook (signal) that the ring of this bright square-outside and round-inside die forging spare is bundled into the square-outside and round-inside shape parts that type technology produces schemed.

The specific embodiment

Below in conjunction with above-mentioned accompanying drawing instance, the ring of square-outside and round-inside die forging spare of the present invention is bundled into type implementation of processes mode does further narration.

The ring of square-outside and round-inside die forging spare of the present invention is bundled into the instance of type technology, includes circular blank 1, round outside but spuare inside shape mould 2, square-outside and round-inside shape parts 3 in the cylindrical.

The ring of square-outside and round-inside die forging spare of the present invention is bundled into type technology, at first bar is heated to 1150～1180 ℃, is forged into circular blank 1 in the cylindrical through jumping-up, punching, reaming operation, and inserts heating in 1150～1180 ℃ of stoves.

The round outside but spuare inside shape mould 2 of 300～400 ℃ of preheatings is placed on the core roller of numerical control ring rolls, again circular blank in the cylindrical 1 is placed round outside but spuare inside shape mould.Start the numerical control ring rolls; By the home roll of numerical control ring rolls, core roller, embrace roller and upper and lower awl roller with circular blank 1 location in round outside but spuare inside shape mould 2, the cylindrical; The core roller radially moves towards home roll; Home roll then drives round outside but spuare inside shape mould 2 by 2mm/s～10mm/s speeds of setting, and applies 500～4200kN power by setting, causes wall thickness reduction to the preliminary dimension of square-outside and round-inside die forging spare promptly to quit work automatically.Close the numerical control ring rolls, take out square-outside and round-inside die forging spare, after 880～920 ℃ normalizing is heat-treated to cooling, carry out machining again, promptly obtain square-outside and round-inside shape parts 3.

Claims

1. the ring of a square-outside and round-inside die forging spare is bundled into type technology; At first bar is heated to 1150～1180 ℃, is forged into circular blank in the cylindrical (1), and insert heating in 1150～1180 ℃ of stoves through jumping-up, punching, reaming operation; It is characterized in that the round outside but spuare inside shape mould (2) of 300～400 ℃ of preheatings is placed on the core roller of numerical control ring rolls; Again circular blank in the cylindrical (1) is placed round outside but spuare inside shape mould (2), start the numerical control ring rolls, with circular blank (1) location in round outside but spuare inside shape mould (2), the cylindrical; The home roll of numerical control ring rolls then drives round outside but spuare inside shape mould (2) by 2mm/s～10mm/s speeds of setting; And set and to apply 500～4200KN power, cause wall thickness reduction to the preliminary dimension of square-outside and round-inside die forging spare promptly to quit work automatically, close the numerical control ring rolls and take out square-outside and round-inside die forging spare; After 880～920 ℃ normalizing is heat-treated to cooling, carry out machining again, promptly obtain square-outside and round-inside shape parts (3).