CN86108315A - Large and medium-sized Al-alloy parts isothermal die forging process - Google Patents
Large and medium-sized Al-alloy parts isothermal die forging process Download PDFInfo
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- CN86108315A CN86108315A CN 86108315 CN86108315A CN86108315A CN 86108315 A CN86108315 A CN 86108315A CN 86108315 CN86108315 CN 86108315 CN 86108315 A CN86108315 A CN 86108315A CN 86108315 A CN86108315 A CN 86108315A
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Abstract
The present invention is a kind of method of producing large and medium-sized Al-alloy parts with isothermal forging process.This method is produced large and medium-sized aluminum alloy isothermal forging part this purpose for being implemented on the hydraulic press, has solved mold materials, mould structure, die heater, contour forging technique parameter and a series of key issues in aspect such as lubricated.Be suitable for the production aviation with this process, the complicated aluminum alloy forge piece of the higher shape of required precision in the fields such as navigation, space flight, electromechanics, and can realize finish forge to large and medium-sized aluminum alloy part.
Description
The present invention is the process of large and medium-sized Al-alloy parts isothermal die forging process.
Isothermal forging is the U.S. in the middle nineteen sixties a kind of new technology that ， And grows up that takes the lead in beginning one's study.Nineteen sixty-eight and 1971, the Soviet Union successively obtains certificate of invention (people and the luxuriant and rich with fragrance Green of C3 such as the luxuriant and rich with fragrance Green BB of C3 Bao Yizuofu of the device that warm deformations such as the certificate of invention of titanium or titanium alloy blade blank isothermy die forging method and production use, BB Bao Yizuofu, people such as FB Lie Fuqinke, 1970 №, 3,1971 № 29 that obtained certificate of invention № 260382 and 315489-" invention, creation, production piece trade mark " communique respectively).The U.S. had also delivered similar patent (№ 3635068 and 36982191972) in 1972.In recent years, the isothermal forging process application study made fast progress in several developed countries, but mainly to be devoted to the titanium alloy be in the invention of the paractical research of warm deformations such as less-deformable alloy of representative and method.Produce the part of different materials, difformity, different accuracy requirement with isothermal forging process, should adopt different processes.
The purpose of this invention is to provide a kind of process and produce large and medium-sized aluminum alloy part with isothermal forging.
The invention is characterized in:
1. mold materials and mould structure.Utilize the 3C that newly succeeds in developing
R3M
O3VN
bMold materials is when working below 500 ℃, and hardness and intensity this characteristics that do not descend substantially the invention solves in the isothermal deformation process, and the strong problem of the heat of mould has guaranteed the required precision of forging part.Adopt the separate combination type mould structure, overcome difficulties such as molding, installation.
2. mold heated.In order to reduce the cost of heater, thereby reduce production costs, the present invention has selected the resistance wire mode of heating that mould is heated.The resistance heater that is designed to separate type up and down heats respectively mould up and down.Die heater has adopted PID precise temperature control equipment, and mould is up and down carried out the control of the mould heart and mold surface temperature respectively.Guaranteed that the die cavity temperature is within the technological requirement scope.It is adiabatic that heater adopts high strength ultralight refractory material to do materials insulations such as furnace lining and alumina-silicate ceramic fibre, and And has designed cooled plate, the protection forging equipment at die holder place up and down.
3. technological parameter.With the aircraft brake aluminium alloy wheel hub for for example shown in the accompanying drawing.Its minimum wall thickness (MINI W.) is about 6mm; The about φ 400mm of maximum outside diameter; The degree of depth is about 204mm.Each cross section, position of this part differs greatly, and has higher technology difficulty.This method is used " the main method of answering " plastic forming theory, by means of Microcomputer Calculation, selects desirable blank physical dimension.Be full of the middle part die cavity too early thereby solved metal, and outside problem such as shaping not also prevents the refluence of metal; Avoided because the middle part is full of die cavity too early causes three-dimensional to press to answer state, made phenomenon ， And such as middle part mold work stress rising guarantee the streamline of forging.
The selection of forging temperature.In the factor of considering that distortion heat obviously raises blank temperature, guarantee to select the isothermal forging temperature under the prerequisite of forging metallurgical quality and serviceability.Because of the alloy material difference, the forging temperature difference, aluminum alloy isothermal forging temperature of the present invention is 350～450 ℃.Consider that aluminium alloy at high temperature is out of shape problems such as easy sticking to mould tool, the mold heated temperature is lower than 0～40 ℃ of forging temperature.
4. lubricated.Adopt lubricant agent special spraying mould and blank surface lubricated once more mould and blank before die forging with molybdenum bisuphide and 20# machine oil mixture simultaneously.Because the burning of 20# machine oil produces gas, has eliminated the forging parital vacuum, is convenient to the demoulding, solved the Wen Ti And that forging is stained with mould and forging has been ejected counterdie with ejecting mechanism.
The invention solves the mold materials in the large and medium-sized Al-alloy parts isothermal die forging process, the heating temperature control of die heater, technological parameter, mould, problem ， And such as lubricated have realized the finish forge of Al-alloy parts.Owing to the invention solves the above-mentioned key issue in the aluminum alloy isothermal forging, thereby on hydraulic press, realized the isothermal die forging process of large and medium-sized Al-alloy parts.As above-mentioned aircraft brake wheel hub, the invention solves former low problem of casting magnesium spare life-span, 300 number of times life-spans of rising and falling of former each casting magnesium brake hub are brought up to about 2500.The present invention compares with existing process, has solved the higher complicated large and medium-sized aluminum alloy part of high muscle, thin-walled, the required precision difficult problem that is shaped, realized the aluminum alloy complex forging less, no machining.The present invention is suitable for the large and medium-sized Al-alloy parts in the fields such as production aviation, navigation, space flight, electromechanics.
Claims (4)
1, a kind of process of large and medium-sized Al-alloy parts isothermal die forging process is characterized in that, the method has adopted the novel die material, die heater, technological parameter and temperature control etc.
According to the large and medium-sized Al-alloy parts isothermal forging process method described in the claim 1, it is characterized in that 2, described technological parameter is that the Forge Heating temperature is between 350～450 ℃, the mold heated temperature is for being lower than between 0～40 ℃ of the forging temperature.
3, according to the large and medium-sized aluminum alloy isothermal contour forging technique method described in the claim 1, it is characterized in that described novel die material is 3C
R3M
O3VN
b
4, according to the large and medium-sized aluminum alloy isothermal contour forging technique method described in the claim 1, it is characterized in that, described die heater is to have adopted with resistance wire to make thermal element, high strength microlight-type fire clay material is made furnace lining, and the alumina-silicate ceramic fibre material is made insulating and is designed to be installed in respectively up and down separable die heater on hydraulic press moved cross beam and the work top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108315 CN86108315A (en) | 1986-12-03 | 1986-12-03 | Large and medium-sized Al-alloy parts isothermal die forging process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108315 CN86108315A (en) | 1986-12-03 | 1986-12-03 | Large and medium-sized Al-alloy parts isothermal die forging process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86108315A true CN86108315A (en) | 1988-06-15 |
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ID=4803878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108315 Pending CN86108315A (en) | 1986-12-03 | 1986-12-03 | Large and medium-sized Al-alloy parts isothermal die forging process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86108315A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672913B (en) * | 2004-02-27 | 2011-05-11 | 斯内克马公司 | Press for holding and pressing a workpiece |
| CN103302213A (en) * | 2012-03-16 | 2013-09-18 | 宝山钢铁股份有限公司 | Precision forming method of large high-strength aluminum alloy forged piece |
| CN105964849A (en) * | 2016-06-14 | 2016-09-28 | 山东南山铝业股份有限公司 | Isothermal die forging technology for large-size high-strength aluminum alloy parts |
-
1986
- 1986-12-03 CN CN 86108315 patent/CN86108315A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672913B (en) * | 2004-02-27 | 2011-05-11 | 斯内克马公司 | Press for holding and pressing a workpiece |
| CN103302213A (en) * | 2012-03-16 | 2013-09-18 | 宝山钢铁股份有限公司 | Precision forming method of large high-strength aluminum alloy forged piece |
| CN103302213B (en) * | 2012-03-16 | 2016-02-24 | 宝钢特钢有限公司 | A kind of accurate forming method of large-scale high muscle aluminum alloy forge piece |
| CN105964849A (en) * | 2016-06-14 | 2016-09-28 | 山东南山铝业股份有限公司 | Isothermal die forging technology for large-size high-strength aluminum alloy parts |
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