CN105689621A

CN105689621A - Die for formation of large-scale double-lug U-shaped forge piece

Info

Publication number: CN105689621A
Application number: CN201610268352.4A
Authority: CN
Inventors: 赵晓光; 万东海; 张令; 张明桥; 冉熊波; 王林; 丁忠
Original assignee: Guizhou Aerospace Xinli Casting and Forging Co Ltd
Current assignee: Guizhou Aerospace Xinli Casting and Forging Co Ltd
Priority date: 2016-04-27
Filing date: 2016-04-27
Publication date: 2016-06-22

Abstract

The invention relates to a die for formation of a large-scale double-lug U-shaped forge piece. The die comprises a die body, wherein a rectangular deep groove is formed in the middle of the die body; two rectangular shallow grooves are formed in the die body and on two sides of the rectangular deep groove respectively, and are communicated with the rectangular deep groove; the vertical distance between the tops of the rectangular shallow grooves in the die body and the bottom of the rectangular deep groove is 1/2 of the height of the large-scale double-lug U-shaped forge piece. The die is used in an improved procedure of a forging method of the large-scale double-lug U-shaped forge piece, and the height of the die is 1/2 of the total height of a large-scale double-lug U-shaped forge piece product, so that the work distance of a punch in the bending formation process of a blank can be reduced effectively, and the bottom thinning quantity is further reduced; when 90 degrees' bending of part of the bottom of the blank is finished, the whole bending process of the whole blank is finished naturally under the driving of the die.

Description

The mould of large-scale ears U-shaped forging molding

Technical field

The present invention relates to the mould of a kind of large-scale ears U-shaped forging molding, belong to technical field of forging。

Background technology

International Thermal-Nuclear Experimental Reactor (is called for short ITER), and plan is the International Thermal-Nuclear Experimental Reactor being participated in build by European Union, China, the U.S., Russia, Japan, Korea S and India seven side in 2005, purpose is to develop controllable nuclear fusion technology, and finally provides new forms of energy unlimited, cleaning, safety for the mankind。This project relates to a kind of large-scale ears U-shaped forging (as shown in Figure 1), this part adopts 316LN austenitic stainless steel material forging to form, owing to 316LN material belongs to austenite structure, changing without ppolymorphism, grain size cannot be improved by heat treatment, therefore, only ensured the grain size of forging by controlled forge process technique, again owing to this part shape is irregular, 316LN material deformation temperature range is narrow, the reasons such as material resistance of deformation is big, are difficult to direct forging molding。

Applicant was in a kind of thermonuclear fusion heap ears U-shaped forging forging method disclosed in the application for a patent for invention that application number is 2014104241045 in 2014, utilize the method can produce the large-scale ears U-shaped forging meeting thermonuclear fusion experimental reactor requirement, but the method yet suffers from some problems。Owing to the product height of large-scale ears U-shaped forging is higher, in the process of bending, drift down moves with product, can produce certain stretching action, easily cause the thinning of product bottom thickness, and after brake forming, the depanning of forging there is also certain difficulty。Conventional technology is to increase blank bottom thickness and strengthens mould draft angle, but the problem brought is to increase the consumption of forging material, also brings along increasing of follow-up forging machining man-hour simultaneously, causes the increase of manufacturing cost。

Summary of the invention

For above-mentioned weak point of the prior art, it is desirable to provide the mould of a kind of large-scale ears U-shaped forging molding, utilize the large-scale ears U-shaped forging of this mould forging molding can effectively reduce thin amount of drawing bottom product。

For solving above-mentioned technical problem, the technical scheme is that and include die ontology, the middle part of described die ontology is provided with a rectangle deep trouth, the die ontology of described rectangle deep trouth both sides is respectively arranged with a rectangle shallow slot, described rectangle deep trouth connects with rectangle shallow slot, and the top of the rectangle shallow slot of described die ontology is to the 1/2 of the height that the vertical distance bottom rectangle deep trouth is the large-scale ears U-shaped forging of finished product。

The bottom of described rectangle deep trouth arranges a through hole。

Due to the fact that the above technical scheme of employing, it has the advantage that 1, the present invention is applied in the operation after the forging method of large-scale ears U-shaped forging improves, and the height of mould is designed to the 1/2 of finished product large-scale ears U-shaped forging total height, therefore, it is possible to effectively reduce blank operating distance of drift in brake forming process, thus reducing bottom to draw thin amount；After blank base section completes 90 degree of bendings, whole blank has just been naturally done whole BENDING PROCESS under it drives。2, the present invention arranges a through hole in the bottom of the rectangle deep trouth of die ontology, therefore, it is possible to after forging terminates, large-scale ears U-shaped forging and die ontology are turned over turnback, is relatively easily gone out by large-scale ears U-shaped forging。3, due to the fact that the height reduction of die ontology, therefore, it is possible to reduce the contact area of blank and mould, thus reducing frictional force between the two。

Accompanying drawing explanation

Fig. 1 is the structural representation of this large-scale ears U-shaped forging；

Fig. 2 is the structural representation of the present invention；

Fig. 3 is the structural representation of blank of the present invention；

Fig. 4 is the structural representation of drift of the present invention；

Fig. 5 is that the present invention utilizes drift, counterdie that blank is carried out the schematic diagram of punching press。

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described。

As shown in Figure 1, the present invention proposes the mould of a kind of large-scale ears U-shaped forging molding, including die ontology 1, the middle part of described die ontology 1 is provided with a rectangle deep trouth 2, the die ontology 1 of described rectangle deep trouth 2 both sides is respectively arranged with a rectangle shallow slot 3, described rectangle deep trouth 2 connects with rectangle shallow slot 3, and the top of the rectangle shallow slot 3 of described die ontology 1 is to the 1/2 of the height that the vertical distance bottom rectangle deep trouth 3 is the large-scale ears U-shaped forging of finished product。Owing to the top of rectangle shallow slot 3 of die ontology 1 is to the 1/2 of the height that the vertical distance bottom rectangle deep trouth 3 is the large-scale ears U-shaped forging 7 of finished product, therefore can effectively reduce blank 5 operating distance of drift 6 in brake forming process, thus reducing bottom to draw thin amount

In a preferred embodiment, a through hole 4 is set in the bottom of rectangle deep trouth 2。

The process utilizing inventive die forging large-scale ears U-shaped forging is as follows: first heat raw material steel nail to 1150～1180 DEG C, then pass through the operations such as jumping-up pulling and produce one flat plate, then narrow anvil is utilized to pull out in the one side of flat board, obtain the blank blank of molding to be bent, again blank blank is put in pond and cool down, until its temperature be down to 100 DEG C once time hang out from pond, obtain blank 5 (as shown in Figure 3) through machining。Blank 5 is carried out ultrasonic examination, after qualified, is curved molding procedure。In brake forming operation, first blank 5 is heated to 900 DEG C, drift 6 (as shown in Figure 4) and inventive die are preheated to 300～400 DEG C, drift 6 and inventive die are placed on hydraulic press work platforms, blank 5 is placed in inventive die (as shown in Figure 5), wherein, the two ends of blank 5 ride in the rectangle shallow slot 3 at inventive die two ends and blank 5 ear structure is positioned at outside rectangle shallow slot 3, the unsettled top being placed in rectangle deep gouge 2, the middle part of blank 5。Then start hydraulic press, utilize drift 6 that blank is pressed for 5 times, obtain large-scale ears U-shaped forging 7。Afterwards drift 6 is hung out, inventive die is overturn 180 ° together with large-scale ears U-shaped forging 7, from the through hole 4 bottom inventive die, large-scale ears U-shaped forging 7 is gone out。

Claims

1. the mould of one kind large-scale ears U-shaped forging molding, including die ontology (1), it is characterized in that: the middle part of described die ontology (1) is provided with a rectangle deep trouth (2), the die ontology (1) of described rectangle deep trouth (2) both sides is respectively arranged with a rectangle shallow slot (3), described rectangle deep trouth (2) connects with rectangle shallow slot (3), the top of the rectangle shallow slot (3) of described die ontology (1) to rectangle deep trouth (3) bottom the height that vertical distance is finished product large-scale ears U-shaped forging (7) 1/2。

2. the mould of large-scale ears U-shaped forging molding as claimed in claim 1, it is characterised in that: the bottom of described rectangle deep trouth (2) arranges a through hole (4)。