CN103111568B - Open die forging forming process of forging stocks of large bulkhead type forge pieces - Google Patents

Abstract

The invention provides an open die forging forming process of forging stocks of large bulkhead type forge pieces. The open die forging forming process of the forging stocks of the large bulkhead type forge pieces is capable of providing qualified forging stocks for precise die forgings of the large bulkhead type forge pieces to guarantee precise die forging process of the forge pieces. Bars or blanks are heated and kept warm before open die forging form of each forging, so that through heating of materials are guaranteed. The open die forging forming process of the forging stocks of the large bulkhead type forge pieces is characterized by including the following steps: (1) flattening the bars, (2) conducting material splitting according to forge piece structures, (3) reversely pressing necks, (4) bending to form, (5) conducting flattening and rod part form, and (6) bending and forming formed rod parts.

Description

A kind of free forging technique of forging stock of large-scale bulkhead forging

Technical field

The present invention relates to the forging stock forming technology field of large scale structure forging, be specially a kind of free forging technique of forging stock of large-scale bulkhead forging.

Background technology

Large-scale bulkhead forging is mainly used in the fields such as Aero-Space.Large-scale bulkhead forging mostly adopted and freely forged crude green body in the past, then directly machining, because crude green body is very large to the surplus of forming part, cause raw materials consumption huge on the one hand, mach cost is huge on the other hand, and processing capacity great Yi causes part deformation.In order to solve the problem, present employing precision die forgings replaces technique in the past, but before precision die forging, need preformed forging stock, because this large-scale bulkhead forging exists the features such as the thin and forging changes of section of many muscle, thickness is large, therefore the open die forging preformed difficulty of its forging stock is comparatively large, forming efficiency is low, the precision die forging stock utilization that also can cause follow-up forging not in place and forging stock is shaped.

Summary of the invention

For the problems referred to above, the invention provides a kind of free forging technique of forging stock of large-scale bulkhead forging, it can provide qualified forging stock for the precision die forging of large-scale bulkhead forging, thus ensures the precision die forging processing of forging.

Its technical scheme is such, and before the free forging that each fire is secondary, bar or blank first heat and be incubated, and ensure material heat penetration, it is characterized in that: it comprises the following steps:

Step one: bar is clapped flat, deformation ratio is 2.5:1;

Step 2: carry out sub-material according to forging structure, carries out sub-material pressure shoulder by clapping flat blank;

Step 3: oppositely press neck, oppositely extrudes neck by the blank after sub-material pressure shoulder;

Step 4: press shaping die, blank entirety bent along described neck, degree of crook is consistent with forging;

Step 5: clap flat and bar portion shaping, according to forging thickness requirement, the while of clapping flat to the different parts of blank, the pulling of bar portion is shaped, and ensures that die forging deflection is 30% ~ 50%;

Step 6: again by the bar portion press shaping die of described shaping.

Adopt the forging stock of the large-scale bulkhead forging of the utility model technique free forging, its forming efficiency is high, can provide qualified forging stock, and improve the stock utilization of die forging for follow-up precision die forging.

Accompanying drawing explanation

Fig. 1 is the present invention's medium-and-large-sized bulkhead forging schematic diagram;

Fig. 2 is forging stock structural representation in the present invention;

Fig. 3 is bar structure schematic diagram in present invention process step one;

Fig. 4 is that in present invention process processing step one, the blank schematic diagram after shaping flattened by bar;

Fig. 5 is the blank schematic diagram in present invention process step 2 after sub-material pressure shoulder;

Fig. 6 is the blank schematic diagram after oppositely pressing neck in present invention process step 3;

Fig. 7 is the blank schematic diagram in present invention process step 4 after press shaping die;

Fig. 8 is the blank schematic diagram after clapping flat and the shaping of bar portion in present invention process step 5;

Fig. 9 is present invention process step 6 king-rod portion press shaping die schematic diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing, specifically describe the process of present invention process:

Before the free forging that each fire is secondary, bar or blank first heat and are incubated, and ensure material heat penetration, it comprises the following steps:

Step one: see Fig. 3 and Fig. 4, clapped by bar 1 and be flatly shaped to blank 2, deformation ratio is 2.5:1;

Step 2: carry out sub-material according to forging structure, carry out sub-material pressure shoulder by clapping flat blank 2, see Fig. 5, in Fig. 4,3 is shoulder;

Step 3: oppositely press neck, oppositely extrudes neck 4 by the blank after sub-material pressure shoulder, sees Fig. 6;

Step 4: press shaping die, blank entirety bent along neck 4, degree of crook is consistent with forging, sees Fig. 7;

Step 5: clap flat and bar portion shaping, according to forging thickness requirement, the while of clapping flat to the different parts of blank, bar portion 5 pulls out and is shaped, and ensures that die forging deflection is 30% ~ 50%, sees Fig. 8, and in Fig. 8, H1, H2 are respectively different sotck thinkness region signals;

Step 6: bar portion 5 press shaping die will be shaped again, is shown in Fig. 9.

Claims (1)

1. a free forging technique for the forging stock of large-scale bulkhead forging, before the free forging that each fire is secondary, blank first heats and is incubated, and ensures blank heat penetration, it is characterized in that: it comprises the following steps:

Step one: blank is clapped flat, deformation ratio is 2.5:1;

Step 2: carry out sub-material according to forging structure, carries out sub-material pressure shoulder by clapping flat blank;

Step 3: oppositely press neck, oppositely extrudes neck by the blank after sub-material pressure shoulder;

Step 4: press shaping die, blank entirety bent along described neck, degree of crook is consistent with forging;

Step 5: clap flat and bar portion shaping, according to forging thickness requirement, the while of clapping flat to the different parts of blank, the pulling of bar portion is shaped, and ensures that die forging deflection is 30% ~ 50%;

Step 6: again by the bar portion press shaping die of described shaping.