CN104438419B - A kind of forging molding process of high tubular aluminum alloy forge piece - Google Patents

A kind of forging molding process of high tubular aluminum alloy forge piece Download PDF

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Publication number
CN104438419B
CN104438419B CN201410573288.1A CN201410573288A CN104438419B CN 104438419 B CN104438419 B CN 104438419B CN 201410573288 A CN201410573288 A CN 201410573288A CN 104438419 B CN104438419 B CN 104438419B
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China
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aluminum alloy
forge piece
ring
blank
alloy forge
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CN201410573288.1A
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Chinese (zh)
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CN104438419A (en
Inventor
许亮
李湘军
王骏
刘智
刘其源
陈翠
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无锡派克新材料科技股份有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution
    • B21H1/06Making articles shaped as bodies of revolution rings of restricted axial length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08Upsetting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10Piercing billets

Abstract

Invention relates to the forging molding process of a kind of high tubular aluminum alloy forge piece, fully deform by using cross upsetting pull method on the one hand can enable aluminum alloy to blank in forging process, as-cast structure is made to become forging tissue, the anisotropy of aluminium alloy rings performance can be reduced furthermore with cross upsetting pull method, increase aluminium alloy rings and radially extend rate.The feed rate of Ring Rolling Machine time in forging process by changing rolling ring, on the one hand it is possible to prevent aluminum alloy forge piece overheated, additionally can also prevent end face peeling and the groove of aluminum alloy forge piece, additionally the heat treatment to aluminum alloy forge piece not only increases forging intensity, the strong words the most more small and dispersed distribution that additionally aluminum alloy forge piece separates out under this heat treatment temperature, reduce the participation stress of aluminum alloy forge piece, prevent follow-up machining distortion.

Description

A kind of forging molding process of high tubular aluminum alloy forge piece

Technical field

The present invention relates to Forging Technology, particularly relate to the forging molding process of a kind of high tubular aluminium alloy (2A14) forging.

Background technology

Aluminium alloy is a most widely used class non-ferrous metal structural material in industry, at Aeronautics and Astronautics, automobile, machinery Manufacture, boats and ships and chemical industry are widely applied.At present in the forging process for high tubular aluminum alloy forge piece, owing to aluminum closes Gold exists in heating process that deformation temperature range is narrow, sensitive to deformation temperature and deformation velocity, coefficient of friction big and mobility Difference, inhomogeneous deformation can cause the local situation such as coarse-grain and forging sticking to mould, and the height of this high tubular aluminum alloy forge piece is 900mm, is therefore easily generated critical strain in forging process, easily produces critical strain, in ring rolling process in forging process May cause unstability, ovalizing deflection, in heat treatment step, ring is easily deformed, finished product uneven microstructure and property after heat treatment The problems such as energy anisotropy is big, substantially increase the production difficulty of aluminum alloy forge piece.

Summary of the invention

The applicant, for above-mentioned existing issue, has carried out Improvement, it is provided that the forging of a kind of high tubular aluminum alloy forge piece Make moulding process, be effectively increased mouldability and the mechanical property of high tubular aluminum alloy forge piece, greatly reduce production difficulty.

The technical solution adopted in the present invention is as follows:

The forging molding process of a kind of high tubular aluminum alloy forge piece, comprises the following steps:

The first step: blanking: use aluminium cast bar is blank;

Second step: heating before forging: the first heating period: be placed in heating furnace by blank, make blank temperature be warming up to not More than 300 DEG C;Second heating period: continue blank is warming up to 470 DEG C ± 5 from the outlet temperature of described first heating period DEG C, it is incubated 22-28h;

3rd step: base: first stage: use cross upsetting pull method that heating gained blank upsetting pull is formed cake part;Second Stage: be punched out described cake part forming the ring base with endoporus;The concrete punching process of described punching is as follows: first profit With punching pin, cake part being gone out counterbore, the degree of depth of described counterbore is 20-50mm, and then the inwall at described counterbore uniformly brushes profit Lubrication prescription, continues punching finally by punching pin to described counterbore, makes described counterbore form through hole, and the diameter of described counterbore is less than described The diameter of through hole.

Further improvement as technique scheme:

4th step: melt down heating for the first time: heat in described ring base is reentered into heating furnace, make the temperature of ring base Reach 470 DEG C ± 5 DEG C, be incubated 5-7h;

5th step: reaming: described ring base uses open die forging saddle support reaming preparation roll over ring ring base;

6th step: second time melts down heating: carry out in described rolling ring ring base is reentered into heating furnace being heated to 470 DEG C ± 5 DEG C, it is incubated 2-3h;

7th step: roll over ring: using Ring Rolling Machine that described rolling ring ring base carries out the system of rolling over and form aluminum alloy forge piece, Ring Rolling Machine is radially Feed rate is 0.6~0.7mm/s, and during rolling ring, the surface of described aluminum alloy forge piece is constantly brushed with lubricant;

8th step: by the 9th step gained aluminum alloy forge piece air cooling to room temperature;

9th step: heat treatment: first stage: the aluminum alloy forge piece that temperature is room temperature is heated to 500 DEG C ± 5 DEG C, insulation Solution heat treatment is carried out after 5-7h;Second stage: by horizontal type ring rolling machine looping mill rolling cold to the aluminum alloy forge piece after solid solution, the completeest Become artificial aging heat treatment;ID distortion amount during the cold looping mill rolling of aluminum alloy forge piece is 0%~0.3%, the temperature of artificial aging heat treatment Degree is 150~160 DEG C;

Tenth step: machining is to requiring size.

Its further technical scheme is:

The concrete jumping-up mode of cross jumping-up method described in the 3rd step first stage is as follows: first along Z axis by blank jumping-up shape Become disk, then along X-axis by disk pulling formation rectangle blank, then rectangle blank is formed square base along X-axis jumping-up Material, again pulls out square blank formation rectangle blank, then forms described rectangle blank along Z axis jumping-up along Z axis Cake part;

Open die forging saddle support reaming described in 5th step uses the mandrel reaming in two times of different-diameter, reaming mandrel for the first time Diameter less than second time reaming mandrel diameter;

The detailed process of the 9th step first stage solution heat treatment is as follows: it is 60~70 DEG C that aluminum alloy forge piece is put into water temperature Water in solid solution, enabling aluminum alloy to the temperature after forging solid solution is 60~70 DEG C;

Described lubricant is mixed with Adeps Sus domestica by graphite.

Described lubricant is mixed with Adeps Sus domestica by graphite.

Beneficial effects of the present invention is as follows:

The inventive method uses cross upsetting pull method when base, on the one hand can enable aluminum alloy to blank and fully deform, make casting State tissue becomes forging tissue, can reduce the anisotropy of aluminium alloy rings performance furthermore with cross upsetting pull method, increases aluminum Alloy rings radially extends rate.

The inventive method when punching first with one counterbore of punching pin punching, by lubricating at counterbore inwall even application At punching through hole after agent, effectively prevent from pulling endoporus when punch process.

The inventive method utilizes saddle support reaming and uses the mandrel punching in two times of different-diameter can be in the most anti-stop ring base Wall leaves deeper hammering.

When rolling over ring by changing, the feed rate of Ring Rolling Machine, is on the one hand possible to prevent aluminum alloy forge piece overheated, additionally can also Preventing end face peeling and the groove of aluminum alloy forge piece, additionally the heat treatment to aluminum alloy forge piece not only increases forging intensity, separately The strong words the most more small and dispersed distribution that outer aluminum alloy forge piece separates out under this heat treatment temperature, reduces the ginseng of aluminum alloy forge piece With stress, prevent follow-up machining distortion.

Accompanying drawing explanation

Fig. 1 is the temperature curve schematic diagram heated before forging in the present invention.

Fig. 2 is the schematic diagram of base process in the present invention.

Fig. 3 is the temperature curve schematic diagram melting down heating in the present invention for the first time.

Fig. 4 is the temperature curve schematic diagram that in the present invention, second time melts down heating.

Detailed description of the invention

Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is described.

Embodiment 1:

The forging molding process of a kind of high tubular aluminum alloy forge piece comprises the following steps:

The first step: blanking: use aluminium cast bar is blank, a diameter of 680mm of this blank, height is 1400mm;

Second step: heating before forging: the first heating period: be placed in heating furnace by blank, make blank temperature be warming up to 290 ℃;Second heating period: continue blank is warming up to 465 DEG C from the outlet temperature (290 DEG C) of described first heating period, insulation 22h.Before forging, the temperature curve of heating is as shown in Figure 1.

3rd step: base: as in figure 2 it is shown, the first stage: use cross upsetting pull method that heating gained blank upsetting pull is formed circle Cake part;The concrete jumping-up mode of institute's cross jumping-up method is as follows: first along Z axis, blank jumping-up is formed disk, disk a diameter of 1000mm, height is for shown in 650mm(Fig. 2 a).Then along X-axis, disk pulling is formed rectangle blank, this rectangle blank A length of 1370mm, width is 610mm, and height is for shown in 610mm(Fig. 2 b).Again rectangle blank is just formed along X-axis jumping-up Stock of square, a length of 630mm of this square blank, width is 900mm, and height is for shown in 900mm(Fig. 2 c).By square Blank again pulls out formation rectangle blank, a length of 1370mm of this rectangle blank along Z axis, and height is 610mm, and width is Shown in 610mm(Fig. 2 d).Then to rectangle blank along Z axis jumping-up formed cake part, a diameter of 835mm of cake part, highly Shown in 930mm(Fig. 2 e).Second stage: be punched out being formed with the ring base of endoporus to cake part, described punching concrete Punching process is as follows: going out a deep 20mm counterbore first with punching pin, then the inwall at counterbore uniformly brushes lubricant, profit Lubrication prescription is mixed with Adeps Sus domestica by graphite, finally by punching pin, counterbore is continued punching, makes counterbore form Φ 280 through hole (such as figure Shown in 2f), the diameter of above-mentioned counterbore, less than the diameter of through hole, is first gone out counterbore and is effectively prevented from pulling endoporus during punching.

4th step: melt down heating for the first time: as it is shown on figure 3, heat in ring base is reentered into heating furnace, make ring base Temperature reach 465 DEG C, be incubated 5h;

5th step: reaming: ring base uses open die forging saddle support reaming preparation roll over ring ring base, first uses Φ's 280 during reaming Mandrel carries out saddle support reaming, and during saddle support to Φ 500, the mandrel of replacing Φ 400 carries out saddle support reaming anti-stop ring base inwall again has relatively Deep hammering.The stability that postorder is rolled over ring has very great help.The size rolling over ring ring base after saddle support reaming is Φ 1500 × 1200 ×930。

6th step: second time melts down heating: as shown in Figure 4, rolles over ring ring base by the 5th step gained and is reentered in heating furnace Carry out being heated to 465 DEG C, be incubated 2h;

7th step: roll over ring: using Ring Rolling Machine that described rolling ring ring base carries out the system of rolling over and form aluminum alloy forge piece, Ring Rolling Machine is radially Feed rate is 0.6mm/s, on the one hand forging can be prevented overheated by the radial feed speed adjusting Ring Rolling Machine, additionally can also prevent Not-go-end face peeling and groove.During rolling ring, the surface of described aluminum alloy forge piece is constantly brushed with lubricant, rolles over this aluminium alloy after ring The size of forging is Φ 2050 × Φ, 1840 × 930(race diameter/inner ring diameter/highly).

8th step: by the 9th step gained aluminum alloy forge piece air cooling to room temperature;

9th step: heat treatment: first stage: the aluminum alloy forge piece that temperature is room temperature is heated to 495 DEG C, 5h is laggard in insulation Row solution heat treatment, the detailed process of solution heat treatment is as follows: aluminum alloy forge piece is put into solid solution in the water that water temperature is 60 DEG C, makes Temperature after aluminum alloy forge piece solid solution is 60 DEG C.

Second stage: by horizontal type ring rolling machine looping mill rolling cold to the aluminum alloy forge piece after solid solution, aluminum alloy forge piece during cold looping mill rolling Deflection be 0.1%, finally complete artificial aging heat treatment, the temperature of artificial aging heat treatment is 150 DEG C.

Tenth step: machine to requiring size Φ 1980* Φ 1800*930(outside dimension, internal diameter size, highly).

Embodiment 2:

The forging molding process of a kind of high tubular aluminum alloy forge piece comprises the following steps:

The first step: blanking: use aluminium cast bar is blank, a diameter of 680mm of this blank, height is 1500mm, and weight is 1550kg。

Second step: heating before forging: the first heating period: be placed in heating furnace by blank, make blank temperature be warming up to 300 ℃;Second heating period: continue blank is warming up to 475 DEG C from the outlet temperature (300 DEG C) of described first heating period, insulation 28h.Before forging, the temperature curve of heating is as shown in Figure 1.

3rd step: base: as in figure 2 it is shown, the first stage: use cross upsetting pull method that heating gained blank upsetting pull is formed circle Cake part;The concrete jumping-up mode of institute's cross jumping-up method is as follows: first along Z axis, blank jumping-up being formed disk, disk diameter is 1030mm, height is for shown in 650mm(Fig. 2 a).Then along X-axis, disk pulling being formed rectangle blank, this rectangle blank is long Degree is 1470mm, and height and width are shown in 610mm(Fig. 2 b).Again rectangle blank is formed square base along X-axis jumping-up Material, a length of 650mm of square blank, height and width are shown in 910mm(Fig. 2 c).By square blank along Z axis again Secondary pulling forms rectangle blank, a length of 1470mm of rectangle blank, and height and width are shown in 610mm(Fig. 2 d). Then along Z axis jumping-up, described rectangle blank being formed cake part, a diameter of 860mm of cake part, height is 930mm(Fig. 2 e institute Show).Second stage: being punched out described cake part forming the ring base with endoporus, the concrete punching process of described punching is such as Under: going out a deep 20mm counterbore first with punching pin, then the inwall at counterbore uniformly brushes lubricant, and lubricant is by graphite It is mixed with Adeps Sus domestica, finally by punching pin, described counterbore is continued punching, make counterbore form Φ 280 through hole (such as Fig. 2 f institute Show), the diameter of above-mentioned counterbore, less than the diameter of through hole, is first gone out counterbore and is prevented from pulling endoporus during punching.

4th step: melt down heating for the first time: as it is shown on figure 3, heat in ring base is reentered into heating furnace, make ring base Temperature reach 475 DEG C, be incubated 7h;

5th step: reaming: ring base uses open die forging saddle support reaming preparation roll over ring ring base, first uses Φ's 280 during reaming Mandrel carries out saddle support reaming, and during saddle support to Φ 500, the mandrel of replacing Φ 400 carries out saddle support reaming anti-stop ring base inwall again has relatively Deep hammering.The stability that postorder is rolled over ring has very great help.The size rolling over ring ring base after saddle support reaming is Φ 1500 × 1200 ×930。

6th step: second time melts down heating: as shown in Figure 4, rolles over ring ring base by the 5th step gained and is reentered in heating furnace Carry out being heated to 475 DEG C, be incubated 3h;

7th step: roll over ring: using Ring Rolling Machine that described rolling ring ring base carries out the system of rolling over and form aluminum alloy forge piece, Ring Rolling Machine is radially Feed rate is 0.7mm/s, on the one hand forging can be prevented overheated by the radial feed speed adjusting Ring Rolling Machine, additionally can also prevent Not-go-end face peeling and groove.During rolling ring, the surface of described aluminum alloy forge piece is constantly brushed with lubricant, rolles over this aluminium alloy after ring The size of forging is Φ 2050 × Φ, 1840 × 930(race diameter/inner ring diameter/highly).

8th step: by the 9th step gained aluminum alloy forge piece air cooling to room temperature;

9th step: heat treatment: first stage: the aluminum alloy forge piece that temperature is room temperature is heated to 505 DEG C, 7h is laggard in insulation Row solution heat treatment, the detailed process of solution heat treatment is as follows: aluminum alloy forge piece is put into solid solution in the water that water temperature is 70 DEG C, makes Temperature after aluminum alloy forge piece solid solution is 70 DEG C.

Second stage: by horizontal type ring rolling machine looping mill rolling cold to the aluminum alloy forge piece after solid solution, aluminum alloy forge piece during cold looping mill rolling Deflection be 0.3%, finally complete artificial aging heat treatment, the temperature of artificial aging heat treatment is 160 DEG C.

Tenth step: machine to requiring size Φ 2000* Φ 1810*930(outside dimension, internal diameter size, highly).

Above description is explanation of the invention, is not the restriction to invention, and limited range of the present invention sees right Requirement, in the case of the basic structure of the present invention, the present invention can make any type of amendment.

Claims (3)

1. the forging molding process of one kind high tubular aluminum alloy forge piece, it is characterised in that comprise the following steps:
The first step: blanking: use aluminium cast bar is blank;
Second step: heating before forging: the first heating period: be placed in heating furnace by blank, make blank temperature be warming up to no more than 300℃;Second heating period: continue blank is warming up to 470 DEG C ± 5 DEG C from the outlet temperature of described first heating period, protect Temperature 22-28h;
3rd step: base: first stage: use cross upsetting pull method that heating gained blank upsetting pull is formed cake part;Second stage: It is punched out described cake part forming the ring base with endoporus;The concrete jumping-up mode of described cross jumping-up method is as follows: first Along Z axis, blank jumping-up is formed disk, then along X-axis, disk pulling is formed rectangle blank, then by rectangle blank along X-axis Jumping-up forms square blank, square blank again pulls out formation rectangle blank along Z axis, then to described rectangle base Expect to form cake part along Z axis jumping-up;The concrete punching process of described punching is as follows: it is heavy to go out cake part first with punching pin Hole, the degree of depth of described counterbore is 20-50mm, and then the inwall at described counterbore uniformly brushes lubricant, finally by punching pin pair Described counterbore continues punching, makes described counterbore form through hole, and the diameter of described counterbore is less than the diameter of described through hole;
4th step: melt down heating for the first time: heat in described ring base is reentered into heating furnace, make the temperature of ring base reach 470 DEG C ± 5 DEG C, it is incubated 5-7h;
5th step: reaming: described ring base uses open die forging saddle support reaming preparation roll over ring ring base;Described open die forging saddle support reaming is adopted With the reaming in two times of the mandrel of different-diameter, the diameter of reaming mandrel is less than the diameter of second time reaming mandrel for the first time;
6th step: second time melts down heating: carry out being heated to 470 DEG C ± 5 DEG C in described rolling ring ring base is reentered into heating furnace, Insulation 2-3h;
7th step: roll over ring: use Ring Rolling Machine that described rolling ring ring base carries out the system of rolling over and form aluminum alloy forge piece, Ring Rolling Machine radial feed Speed is 0.6~0.7mm/s, rolles over the surface of described aluminum alloy forge piece during ring and is constantly brushed with lubricant, described lubricant by Graphite is mixed with Adeps Sus domestica;
8th step: by the 9th step gained aluminum alloy forge piece air cooling to room temperature;
9th step: heat treatment: first stage: the aluminum alloy forge piece that temperature is room temperature is heated to 500 DEG C ± 5 DEG C, is incubated 5-7h After carry out solution heat treatment;Second stage: by horizontal type ring rolling machine looping mill rolling cold to the aluminum alloy forge piece after solid solution, finally complete people Work aging strengthening model;
Tenth step: machining is to requiring size.
The forging molding process of a kind of high tubular aluminum alloy forge piece the most as claimed in claim 1, it is characterised in that: the 9th step The detailed process of one stage solution heat treatment is as follows: aluminum alloy forge piece is put into solid solution in the water that water temperature is 60~70 DEG C, makes aluminum Temperature after alloy forged piece solid solution is 60~70 DEG C.
The forging molding process of a kind of high tubular aluminum alloy forge piece the most as claimed in claim 1, it is characterised in that: the 9th step In two-stage during Ring Rolling Machine looping mill rolling cold to aluminum alloy forge piece, the ID distortion amount of aluminum alloy forge piece is 0%~0.3%, artificial aging The temperature of heat treatment is 150~160 DEG C.
CN201410573288.1A 2014-10-24 2014-10-24 A kind of forging molding process of high tubular aluminum alloy forge piece CN104438419B (en)

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