CN102303061B - Forming method for branch type parts - Google Patents
Forming method for branch type parts Download PDFInfo
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- CN102303061B CN102303061B CN 201110297252 CN201110297252A CN102303061B CN 102303061 B CN102303061 B CN 102303061B CN 201110297252 CN201110297252 CN 201110297252 CN 201110297252 A CN201110297252 A CN 201110297252A CN 102303061 B CN102303061 B CN 102303061B
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Abstract
The invention discloses a forming method for a branch type parts, comprising working procedures of blanking, tooling of a coarse-grain ring, grade-one isothermal forming, primary bottom tooling and stamping, grade-two isothermal forming, secondary bottom tooling and stamping and toughening heat treatment, and being suitable for forming large-scale high-strength aluminum alloy and magnesium alloy branch elements. The method is characterized in that the grade-one isothermal forming uses a trivalve split segment male die, before forming, the blank is processed with the treatment of tooling the coarse-grain ring, and after being formed, the blank is processed with the primary bottom tooling and stamping; in the grade-two isothermal forming, a trivalve split segment insert is arranged in a female die cavity, and after being formed, the blank is processed with the treatment of secondary bottom tooling and sampling. The method effectively solves the restrictive problems of big difficulties in forming medium or large scale aluminum alloy and magnesium alloy branch elements, and less tonnage of equipment; technology is simple; and the formed branch type elements have better mechanical properties and high surface quality.
Description
Technical field
The present invention relates to the manufacturing process of a kind of medium-and-large-sized aluminium, magnesium alloy branch class part.
Background technology
Along with the equipment lightweight requirements becomes increasingly conspicuous, become the preferred material of Structure weight reduce as the light material of representative take high strength alumin ium alloy, magnesium alloy, various aluminium strip steel, magnesium get more and more for the product of aluminium shaping processing, have satisfied to a certain extent the equipment Development needs.
High strength alumin ium alloy, magnesium alloy materials forming temperature narrow range, require very high to blank heating control and forming technology, the particularly shaping of medium-and-large-sized aluminium, magnesium alloy parts, have that equipment tonnage is not enough, the shaping difficulty large, structure property is controlled the outstanding problems such as poor, restricted the application in medium-and-large-sized, complex parts of aluminium, magnesium alloy.
Some aluminium alloy branch class part outside dimensions reach ￠ 390mm, magnesium alloy branch class part outside dimension reaches ￠ 400mm, and has the elongated branch of six lobes, and when adopting Integratively to be shaped, shaping load is high, the press that needs to introduce high tonnage is produced, and investment is large, cost is high; Carry out machining after adopting the whole Strengthening and Toughening heat treatment of bar, have the restriction problems such as waste of material is serious, cost is high, properties of product are poor.
Summary of the invention
The object of the present invention is to provide the manufacturing process of the branch class part that a kind of equipment investment is few, stock utilization is high.
To achieve these goals, by the following technical solutions:
A kind of manufacturing process of branch class part comprises blanking, intermediate treatment and Strengthening and Toughening heat treatment three link, and it is characterized in that: described intermediate treatment link comprises the steps:
Car coarse grain ring step: turning is carried out on the surface of extruded bars processed;
One-level ausforming step: adopt three lobe Split assembled punch to carry out backward extrusion to the blank that is arranged in the one-level isothermal forming mould; Wherein three lobe Split assembled punch are comprised of three punch that are 120o, the one-level isothermal forming mould comprises die, the below of die is disposed with lower bolster and lower bolster, the heating and heat-insulating device that is arranged at the outer of lower bolster surrounds die, and push rod passes lower bolster and lower bolster can contact with blank; Three lobe Split assembled punch and die are applied lubricant; Then the blank after heat tracing is put into concave die cavity, three lobe Split assembled punch descending with the blank contact process in, blank generation plastic deformation; When being out of shape at the end, adopt push rod to eject blank;
Gross weight step at the bottom of one train: the blank gross weight after the one-level ausforming is machined away fully;
Secondary ausforming step: adopt three lobe Split assembled punch to carry out backward extrusion to the blank that is arranged in the secondary isothermal forming mould; Wherein the secondary isothermal forming mould is inserted with the three lobe Split assembleds identical with three lobe Split assembled punch shapes in being placed on the one-level isothermal forming mould by the one-level isothermal forming mould and is formed; Three lobe Split assembled punch and die are applied lubricant; Then the blank after heat tracing is put into concave die cavity, guarantee simultaneously three lobe through holes of blank and the morpheme position consistency that three lobe Split assembleds are inserted; Three lobe Split assembleds are inserted and the staggered 60o of three lobe Split assembled punch arranges, three lobe Split assembled punch descending with the blank contact process in, blank generation plastic deformation; When being out of shape at the end, adopt push rod to eject blank;
Gross weight step at the bottom of two trains: the workpiece gross weight after the secondary ausforming is machined away fully.
When described one-level ausforming and secondary ausforming, backward extrusion speed is 5 ~ 15mm/s, and lubricant is colloidal graphite mixed with water, and the die heating-up temperature is lower 30 ~ 50 ℃ than blank heating temperature.
For preventing the blank grain growth, during described secondary ausforming, blank heating temperature during than the one-level ausforming low 10 ℃.
The present invention has reduced the input of large-tonnage equipment, has improved stock utilization, by the control to raw material tissue, ausforming parameter, heat treatment parameter, has satisfied accessory size and performance indications simultaneously.
Description of drawings
Fig. 1 is the schematic diagram of part after one-level ausforming step;
Fig. 2 is the schematic diagram of part after the gross weight step at the bottom of a train;
Fig. 3 is the schematic diagram of part after secondary ausforming step;
Fig. 4 is the schematic diagram of part after the gross weight step at the bottom of two trains;
Fig. 5 is the schematic diagram of one-level isothermal forming mould;
Fig. 6 is the schematic diagram of mould in secondary ausforming step;
Fig. 7 is the top view of part 1 in Fig. 5.
In figure, part 1 is three lobe Split assembled punch, and part 2 is die, and part 3 is backing plate, and part 4 is lower bolster, and part 5 is push rod, and part 6 is heating and heat-insulating device, and part 7 is blank, and part 8 is that three lobe Split assembleds are inserted.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated, but be not that the present invention is done any restriction.
As shown in Figures 1 to 4, a kind of manufacturing process of branch class part comprises at the bottom of blanking-car coarse grain ring-one-level ausforming-a train gross weight-six of Strengthening and Toughening heat treatments step at the bottom of gross weight-secondary ausforming-two train.
Car coarse grain ring operation is turning to be carried out on the surface of former extruded bars process, and 7A04 rods and bars of aluminium alloy turning amount is 3 ~ 4mm, and Mg-Gd-Y-Zr magnesium alloy rod turning amount is 2 ~ 3mm.
As shown in Figure 5, the one-level isothermal forming mould comprises die 2, the below of die 2 is disposed with lower bolster 3 and lower bolster 4, and the heating and heat-insulating device 6 that is arranged at the outer of lower bolster 4 surrounds die 2, and push rod 5 passes lower bolster 3 and lower bolster 4 can contact with blank.The external diameter of three lobe Split assembled punch 1 is than the monolateral little 0.5 ~ 1mm of die internal diameter.
Blank is placed in die 2, and three lobe Split assembled punch 1 from top to bottom push blank, regulate patrix stroke and speed before shaping, the thickness 6 ~ 8mm of gross weight after the assurance backward extrusion; Adopt 6 pairs of moulds of heating and heat-insulating device to carry out temperature control, the mold heated temperature is lower 30 ~ 50 ℃ than blank heating temperature; Three lobe Split assembled punch 1 and die 2 are applied colloidal graphite mixed with water; Then the blank 7 after heat tracing is put into die 2 die cavities, three lobe Split assembled punch 1 descending with blank 7 contact processes in, plastic deformations occur in blank 7; When being out of shape at the end, adopt push rod 5 to eject blank.During the one-level ausforming, for the 7A04 aluminium alloy, blank heating temperature is 400 ~ 420 ℃, and temperature retention time is 3 ~ 3.5h; For the Mg-Gd-Y-Zr magnesium alloy, blank heating temperature is 380 ~ 400 ℃, and temperature retention time is 1.5 ~ 2h.
Gross weight step at the bottom of one train is that the blank gross weight after the one-level ausforming is machined away fully.
As shown in Figure 6 and Figure 7, mould in secondary ausforming step, different from mould in one-level ausforming step is, be provided with the three lobe Split assembleds identical with three lobe Split assembled punch 1 shapes in die 2 and insert 8, three lobe Split assembleds are inserted, and to be 60o arranged in a crossed manner for 8 and three lobe Split assembled punch 1, and blank is inserted by three lobe Split assembleds and 8 is fixed in mould.Regulate patrix stroke and speed before shaping, guarantee backward extrusion Web thickness 6 ~ 8mm; Adopt heating and heat-insulating device to carry out temperature control to mould, the mold heated temperature is lower 30 ~ 50 ℃ than blank heating temperature; Three lobe Split assembled punch 1 and die 2 are applied colloidal graphite mixed with water; Then the blank 7 after heat tracing is put into die 2 die cavities, guarantee simultaneously insert 8 morpheme position consistency of three lobe through holes of blank 7 and three lobe Split assembleds; Three lobe Split assembled punch 3 descending with blank 7 contact processes in, plastic deformations occur in blank 7; When being out of shape at the end, adopt push rod 5 to eject blank.
During the secondary ausforming, for preventing the blank grain growth, blank heating temperature during than the one-level ausforming low 10 ℃.
Gross weight step at the bottom of two trains is that the blank gross weight after the secondary ausforming is machined away fully.
The Strengthening and Toughening heat treatment step for the 7A04 aluminium alloy, adopts T6 Strengthening and Toughening Technology for Heating Processing, and namely 470 ℃ * 3h+140 ℃ * 16h(be incubated 3 hours, be incubated 16 hours under 140 ℃ of environment under 470 ℃ of environment), Rm(compression strength), more than reaching 570MPa; For the Mg-Gd-Y-Zr magnesium alloy, adopt T5 Strengthening and Toughening Technology for Heating Processing: 220 ℃ * 20h, more than Rm reaches 440MPa.
The present invention efficiently solves the restriction problems such as medium-and-large-sized aluminium, magnesium alloy branch class part forming difficulty is large, equipment tonnage is not enough, and technique is simple, and the branch class part machinery performance of shaping is good, surface quality is high.
Claims (3)
1. the manufacturing process of a branch class part, comprise blanking, intermediate treatment and Strengthening and Toughening heat treatment three link, and it is characterized in that: described intermediate treatment link comprises the steps:
Car coarse grain ring step: turning is carried out on the surface of extruded bars processed;
One-level ausforming step: adopt three lobe Split assembled punch (1) to carry out backward extrusion to the blank that is arranged in the one-level isothermal forming mould; Wherein three lobe Split assembled punch (1) are comprised of three punch that are 120o, the one-level isothermal forming mould comprises die (2), the below of die (2) is disposed with lower bolster (3) and lower bolster (4), the heating and heat-insulating device (6) that is arranged at the outer of lower bolster (4) surrounds die (2), and push rod (5) passes lower bolster (3) and lower bolster (4) contacts with blank; Three lobe Split assembled punch (1) and die (2) are applied lubricant; Then the blank after heat tracing (7) is put into die (2) die cavity, three lobe Split assembled punch (1) descending with blank (7) contact process in, plastic deformation occurs in blank (7); When being out of shape at the end, adopt push rod (5) to eject blank;
Gross weight step at the bottom of one train: the blank gross weight after the one-level ausforming is machined away fully;
Secondary ausforming step: adopt three lobe Split assembled punch (1) to carry out backward extrusion to the blank that is arranged in the secondary isothermal forming mould; Wherein the secondary isothermal forming mould by one-level isothermal forming mould and the three lobe Split assembleds identical with three lobe Split assembled punch (1) shapes in being placed on the one-level isothermal forming mould insert (8) form; Three lobe Split assembled punch (1) and die (2) are applied lubricant; Then the blank after heat tracing (7) is put into die (2) die cavity, guaranteed simultaneously the insert morpheme position consistency of (8) of three lobe through holes of blank (7) and three lobe Split assembleds; The three lobe Split assembleds staggered 60o of (8) and three lobe Split assembled punch (1) that inserts arranges, three lobe Split assembled punch (3) descending with blank (7) contact process in, plastic deformation occurs in blank (7); When being out of shape at the end, adopt push rod (5) to eject blank;
Gross weight step at the bottom of two trains: the workpiece gross weight after the secondary ausforming is machined away fully.
2. the manufacturing process of branch class part as claimed in claim 1, it is characterized in that: when described one-level ausforming and secondary ausforming, backward extrusion speed is 5 ~ 15mm/s, and lubricant is colloidal graphite mixed with water, and the die heating-up temperature is lower 30 ~ 50 ℃ than blank heating temperature.
3. the manufacturing process of branch class part as claimed in claim 2 is characterized in that: during described secondary ausforming, and blank heating temperature during than the one-level ausforming low 10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110297252 CN102303061B (en) | 2011-09-29 | 2011-09-29 | Forming method for branch type parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110297252 CN102303061B (en) | 2011-09-29 | 2011-09-29 | Forming method for branch type parts |
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| Publication Number | Publication Date |
|---|---|
| CN102303061A CN102303061A (en) | 2012-01-04 |
| CN102303061B true CN102303061B (en) | 2013-05-08 |
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| CN 201110297252 Expired - Fee Related CN102303061B (en) | 2011-09-29 | 2011-09-29 | Forming method for branch type parts |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103920733B (en) * | 2014-03-19 | 2017-01-04 | 何文定 | Positioner is squeezed in cup-shaped bottom outlet part footpath |
| CN112207517A (en) * | 2020-09-30 | 2021-01-12 | 中国船舶重工集团公司第十二研究所 | Method for eliminating surface coarse grains of extruded part of aluminum alloy cylinder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1430965A2 (en) * | 2002-11-01 | 2004-06-23 | Sumitomo Light Metal Industries, Ltd. | Method of manufacturing high-strength aluminium alloy extruded product excelling in corrosion resistance and stress corrosion cracking resistance |
| CN101099979A (en) * | 2007-07-27 | 2008-01-09 | 重庆工学院 | Projective table type composite extruding precision punching forming mould |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6326217A (en) * | 1986-07-18 | 1988-02-03 | Showa Alum Corp | Duplex type extrusion forming method for metal extrusion die and dies for its forming |
| JP2006142325A (en) * | 2004-11-17 | 2006-06-08 | Kobe Steel Ltd | Bridge die for extruding aluminum alloy shape |
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2011
- 2011-09-29 CN CN 201110297252 patent/CN102303061B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1430965A2 (en) * | 2002-11-01 | 2004-06-23 | Sumitomo Light Metal Industries, Ltd. | Method of manufacturing high-strength aluminium alloy extruded product excelling in corrosion resistance and stress corrosion cracking resistance |
| CN101099979A (en) * | 2007-07-27 | 2008-01-09 | 重庆工学院 | Projective table type composite extruding precision punching forming mould |
Non-Patent Citations (2)
| Title |
|---|
| JP昭63-26217A 1988.02.03 |
| JP特开2006-142325A 2006.06.08 |
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Granted publication date: 20130508 Termination date: 20130929 |