CN202239441U

CN202239441U - Forging die for isothermal finish die forging

Info

Publication number: CN202239441U
Application number: CN2011204082996U
Authority: CN
Inventors: 李念奎; ***
Original assignee: HARBIN ZHONGFEI NEW TECHNOLOGY Co Ltd
Current assignee: HARBIN ZHONGFEI NEW TECHNOLOGY Co Ltd
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2012-05-30
Anticipated expiration: 2021-10-24

Abstract

The utility model discloses a forging die for isothermal finish die forging, which relates to an isothermal forging die and is used for solving the problems of low strength, easiness in cracking and piling, difficulty in detaching, low accuracy, waste of blanks, easiness in die sticking and unsuitability for working at high temperatures for long time, existing in the conventional forging die for isothermal finish die forging. Both an upper die and a lower die are regular quadrangular prisms; the lower end face of the upper die and the upper end face of the lower die are provided with a lower die cavity and an upper section cavity; the lower end face of the lower die is provided with a central hole communicated with the upper die cavity; the central hole is in sliding fit with a working section of a carrier rod; the cross sectional area of a root part of a circular bump arranged at the upper end of the lower die is smaller than that of the regular quadrangular prism of the lower die; four vertex angles of the upper end face of the upper die and the four vertex angles of the lower end face of the lower die are provided with chamfers R respectively; R=3-7 millimeters; the pattern draft of the upper die cavity of the lower die is alpha; alpha=0.5-1.5 degrees; the lower end face of the upper die is attached to the upper end face of the right quadrangular prism of the lower die; and the die is made from 5CrNiMo. The forging die is particularly suitable for manufacturing and forging an aluminum alloy forged piece.

Description

The smart die forging forging mold of isothermal

Technical field

The utility model relates to a kind of isothermal forging mould.

Background technology

Isothermal die forging process is called for short isothermal forging, is the die forging that mold heated arrives the blank deformation temperature and is out of shape with low strain rate.The isothermal forging technology begins continuous maturation from the seventies in 20th century, and generally is used for the manufacturing of aeronautics and space aircraft important structure part, has obtained very significantly technical economic benefit.That the isothermal forging technology is mainly used in is complex-shaped in the aerospace industry, the demanding difficult moulding material forging of the internal soundness production on the high muscle of thin web plate, forging surface.Moreover, compare with conventional die forging, the isothermal die forging process technology is a power-saving technology still.But, during isothermal die forging process is only applicable to, the forging production of small lot.In the smart die forging of isothermal Mould design whether determined rationally whether forging qualified, die life length and forging cost.

China's mould steel commonly used mainly contains 4CrW2Si, 5CrW2Si, 6CrW2Si, 9CrSi, 60Si2Mn, 5CrMnMo, 5CrSiMo, 5SiMnMoV at present, and these steel all have favorable shock resistance, is suitable for forging.The impact resistance of above-mentioned material steel after heating (especially heating-up temperature is between 350-400 ℃) descends quite big, is not suitable for for a long time operation at high temperature.

Moreover, adopt the smart die forging forging mold of isothermal of above-mentioned material in use also exist intensity low, be prone to split and be prone to that heap, dismounting mould difficulty, precision are low, waste blank material, be prone to the problem of sticking to mould.

The utility model content

The utility model for solve the smart die forging forging mold of existing isothermal exist intensity low, be prone to split and be prone to that heap, dismounting mould difficulty, precision are low, waste blank material, be prone to sticking to mould, be not suitable for the problem of long-time operation at high temperature, and then provide a kind of isothermal smart die forging forging mold.

The utility model is to address the above problem the technical scheme of taking to be: the smart die forging forging mold of the isothermal of the utility model, and said mould comprises upper die and lower die and push rod; The profile of upper die and lower die is four-prism; The cross-sectional area of the four-prism of patrix and the four-prism of counterdie equates; The middle part of the lower surface of patrix is provided with lower impressions; The middle part of the upper surface of counterdie is provided with upper impression, and the middle part of the lower surface of counterdie is provided with the centre bore that communicates with said upper impression, and the active section of this centre bore and push rod is slidingly matched; The upper end of counterdie is provided with the truncated cone-shaped projection, and the cross-sectional area of said truncated cone-shaped projection root is less than the cross-sectional area of the four-prism of counterdie, and four drift angles of four drift angles of the upper surface of patrix and the lower surface of counterdie are provided with chamfering R respectively; R=3-7mm; The pattern draft of the upper impression of counterdie is α, α=0.5～1.5 °, and patrix is assemblied on the counterdie; And the lower surface of patrix abuts on the upper surface of four-prism of counterdie, the mould of said mould for being processed by 5CrNiMo.

The beneficial effect of the utility model is: one, the mould of the mould of the utility model for being processed by 5CrNiMo; It is compared with the mould of being processed by 5CrMnMo and has better toughness; Be out of shape little, intensity is high, be difficult for splitting, precision high, is fit to operation at high temperature for a long time.Two,, cause forging and finish quite difficulty of back dismounting mould because mould can expand after heating, and lubricating graphite can fill up the slit between mould and die holder when forging; The utility model is provided with chamfering R respectively at four drift angles of the lower surface of four drift angles of the upper surface of patrix and counterdie; And R=3-7mm, make to forge finish back dismounting mould become easily (here the R value be difficult for excessive, as excessive; Can be too small to mould and die holder contact-making surface, to impacting die life).Three, the utility model is set pattern draft in the reasonable scope, can satisfy the withdrawing pattern demand, makes things convenient for discharging, reach and be not stained with mould, and required woollen amount is less.Four, the utility model is simple in structure, easy to use, the forging qualification rate high, is particularly suitable for making the reflectal member.

Description of drawings

Fig. 1 is the main cutaway view of the patrix of the utility model, and Fig. 2 is the vertical view of Fig. 1, and Fig. 3 is the main cutaway view of counterdie; Fig. 4 is the vertical view of Fig. 3; Fig. 5 is the overall structure front view of the utility model, and Fig. 6 is that Fig. 7 is the stereogram of die holder through the forging master cutaway view after the die forging processing.

The specific embodiment

The specific embodiment one: combine Fig. 1-Fig. 5 explanation, the smart die forging forging mold of the isothermal of this embodiment, said mould comprises patrix 1, counterdie 2 and push rod 3; The profile of patrix 1 and counterdie 2 is four-prism 10; The cross-sectional area of the four-prism 10 of patrix 1 and the four-prism 10 of counterdie 2 equates; The middle part of the lower surface of patrix 1 is provided with lower impressions 4; The middle part of the upper surface of counterdie 2 is provided with upper impression 5, and the middle part of the lower surface of counterdie 2 is provided with the centre bore 6 that communicates with said upper impression 5, and this centre bore 6 is slidingly matched with the active section 7 of push rod 3; The upper end of counterdie 2 is provided with truncated cone-shaped projection 9; The cross-sectional area of said truncated cone-shaped projection 9 roots is less than the cross-sectional area of the four-prism 10 of counterdie 2; Four drift angles of four drift angles of the upper surface of patrix 1 and the lower surface of counterdie 2 are provided with chamfering R respectively, R=3-7mm, and the pattern draft of the upper impression 5 of counterdie 2 is α; α=0.5～1.5 °; Patrix 1 is assemblied on the counterdie 2, and the lower surface of patrix 1 abuts on the upper surface of four-prism 10 of counterdie 2 mould of said mould for being processed by 5CrNiMo.

The specific embodiment two: combine Fig. 3 explanation, pattern draft α=1 of the upper impression 5 of the counterdie 2 of this embodiment °.Be beneficial to withdrawing pattern.Other is identical with the specific embodiment one.

In conjunction with Fig. 1-Fig. 7 explanation, during use patrix 1 and counterdie 2 put into the upper and lower cavity of die holder 8 respectively, start die holder heater switch heating mould, heat after 8 hours, mold temperature reaches 350-400 ℃; The forging blank material heats in shaft furnace, is heated to 450 ℃, afterwards, the forging blank material is put on the upper impression 5 of counterdie 2; Ajust, start forging press decline button, forging press is descending, until complete matched moulds; Start forging press rising button, forging press rises, and stops until reaching spacing.Start push rod and eject button, utilize push rod 3 that the forging blank material is ejected, the materials pincers are clamped out forging 11, place the case platform.

Claims

1. the smart die forging forging mold of an isothermal, said mould comprises patrix (1), counterdie (2) and push rod (3); The profile of patrix (1) and counterdie (2) is four-prism (10); The cross-sectional area of the four-prism (10) of patrix (1) and the four-prism (10) of counterdie (2) equates; The middle part of the lower surface of patrix (1) is provided with lower impressions (4); The middle part of the upper surface of counterdie (2) is provided with upper impression (5), and the middle part of the lower surface of counterdie (2) is provided with the centre bore (6) that communicates with said upper impression (5), and this centre bore (6) is slidingly matched with the active section (7) of push rod (3); It is characterized in that: the upper end of counterdie (2) is provided with truncated cone-shaped projection (9); The cross-sectional area of said truncated cone-shaped projection (9) root is less than the cross-sectional area of the four-prism (10) of counterdie (2); Four drift angles of four drift angles of the upper surface of patrix (1) and the lower surface of counterdie (2) are provided with chamfering R respectively, R=3-7mm, and the pattern draft of the upper impression (5) of counterdie (2) is α; α=0.5～1.5 °; Patrix (1) is assemblied on the counterdie (2), and the lower surface of patrix (1) abuts on the upper surface of four-prism (10) of counterdie (2) mould of said mould for being processed by 5CrNiMo.

2. the smart die forging forging mold of isothermal according to claim 1 is characterized in that: pattern draft α=1 of the upper impression (5) of counterdie (2) °.