Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces

A technology with large slenderness ratio and residual stress, which is applied in the field of material science and engineering, can solve the problems of reducing the residual stress of alloys, achieve the effects of reducing residual stress, ensuring consistency, and reducing investment

Active Publication Date: 2016-05-04
中国第二重型机械集团德阳万航模锻有限责任公司
6 Cites 7 Cited by

AI-Extracted Technical Summary

Problems solved by technology

At present, the largest press capacity in the world is 800MN, so the residual stress of the alloy cannot be reduced by the overall cold com...
View more

Method used

Because in step C, only the rib 11 of forging 1, the concave fillet 14 positions have been cold-compressed, so the stress of the rib 11 of forging 1, the concave fillet 14 positions is released outwards, thereby reducing The residual stress at the ribs 11 and the concave fillets 14, but there are still residual stresses outside the ribs 11 and the concave fillets 14 of the forging; Place the steel plate 2 so that it overlaps with the indentation of the compressed part by 30% to 50%, and then perform cold compression. Thereby, the stress can be released in some positions outside the cold-compressed part, and at the same time, the indentation overlaps with the compressed part by 30% to 50%, so as to avoid new stress in the cold-compressed part.
In step A, forging 1 carries out cold compression in 4 hours after solution heat treatment; Natural aging occurs after the aluminum alloy solution aging, and the strength of alloy after solid solution increases with the prolongation of placement time, in order to minimize The tonnage of equipment required for small cold compression should be cold compressed as soon as possible after solid solution, but considering factors such as production organization, forgings must be cold compressed within 4 hours after solution heat treatment. The cold compression is performed within 4 hours after the solution heat treatment of the forging 1, so as to ensure that the cold compression greatly reduces the equipment tonnage required for the cold pressing of the forging 1.
In summary, the method provided by the present invention to reduce the residual stress of aluminum alloy large slenderness ratio arc-shaped rib opening class forgings, by designing the innovative cold die structure of forgings 1, and adopting the method of carrying...
View more

Abstract

The invention discloses a method capable of avoiding buckling of forge pieces in the length direction and reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces. A cold compressing die is adopted for implementing the method and the method comprises the steps that A, the forge pieces are subjected to cold compression within four hours after solid solution heat treatment; B, the forge pieces are put into the cold compressing die; C, a steel plate is longitudinally arranged in the position, corresponding to a fillet, of the non-fillet face, and then cold compression deformation is conducted; D, a new steel plate is placed on each of the two sides of the part subjected to cold compression, the overlap amount of the steel plate and the indentation of former cold compression is 30%-50%, and then cold compression deformation is conducted again; E, the step D is repeated until cold compression deformation of all zones of the non-fillet face is completed; F, finally, the middle of the non-fillet face is subjected to cold compression again; and G, overall cold compression is conducted again after segmented cold compression is completed and the overall cold compression is controlled by tonnage. By adopting the method, the uniformity of the appearance of the forge pieces can be ensured and the evenness of the cold compression deformation amount of the forge pieces is improved.

Application Domain

Handling devices

Technology Topic

Steel platesSheet steel +6

Image

  • Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces
  • Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces
  • Method for reducing residual stress of high-slenderness-ratio arc-shaped fillet opened aluminum alloy forge pieces

Examples

  • Experimental program(1)

Example Embodiment

[0050] Example 1
[0051] The material of the forging in this embodiment is 7050 aluminum alloy, the outline is 6100×700×120mm, the web thickness is 80mm, the rib thickness is 40mm, the rib width is 65mm, the rib concave fillet radius is 22mm, and the forging radian 27489mm, the net projected area of ​​the forging is 4.27m 2. The radius of the convex fillet 31 of the cold pressing die is 20mm.
[0052] In this embodiment, the cold-pressed steel plate is a 45# steel plate, and the specification of the steel plate is 6300×130×10mm. The purpose of the steel plate width of 120mm is to be able to cover the ribs and the concave round corners on both sides of the ribs during the first and last crimping.
[0053] The method for reducing the residual stress of the arc-shaped rib opening type forgings of aluminum alloy with large slenderness ratio of the present invention specifically includes the following steps:
[0054] Step 1: Such as image 3 As shown, firstly, the 45# steel plate 2 is placed directly above the ribs 11 for cold pressing, and the cold compression plastic deformation of the product is controlled to 1.5% ± 0.5%, and the steel plate is removed after cold pressing.
[0055] Step 2: Such as Figure 4 As shown, two new 45# steel plates 2 are placed on both sides of the rib 11, and the overlap of each side with the front indentation is 48mm, and then cold pressing is performed to control the cold compression plastic deformation of the product to 2.5% ±0.5%, remove the steel plate 2 after cold pressing.
[0056] Step 3: Such as Figure 5 to 7 As shown, step 2 is repeated until all areas of the non-reinforced surface 12 on the forging 1 are cold pressed.
[0057] Step 4: Finally, a steel plate 2 is cold pressed directly above the rib 11 of the forging 1 to control the cold compression plastic deformation of the product to 1.0% ± 0.5%, and the steel plate 2 is removed after cold pressing.
[0058] Step 5: After the staged cold pressing is finished, perform an overall cold pressing to control the tonnage to 60,000 tons.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Method for producing aluminum film

ActiveUS20150225865A1reduce residual stress
Owner:SUMITOMO ELECTRIC IND LTD

Medical metal titanium or titanium alloy surface composite anticorrosive coating and preparation method thereof

ActiveCN110359074AReduce elastic modulus and hardnessReduce residual stress
Owner:ZHONGYUAN ENGINEERING COLLEGE

Vibrating diaphragm and sound production device

PendingCN114827877AUniform thicknessReduce residual stress
Owner:GOERTEK INC

Laser melting deposition forming ultrasonic workbench

ActiveCN113084168Areduce temperature gradientReduce residual stress
Owner:HARBIN INST OF TECH

Metallic pipe connection

ActiveUS20190285206A1reduce residual stress
Owner:GIACOMINI

Classification and recommendation of technical efficacy words

  • Reduce residual stress
  • increase production capacity

Hot-rolled steel plate and preparation method thereof

InactiveCN104056863AReduce residual stressImprove shape
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1

Laser selective laser melting rapid preheating and powder spreading device

PendingCN108080639AReduce energy consumptionReduce residual stress
Owner:NINGBO RUNYES MEDICAL INSTR

Method for assisting brazing by carbon nanotube reinforced type three-dimensional middle layer

ActiveCN106346100AReduce residual stressHigh joint strength
Owner:哈尔滨工大特种连接高新科技发展股份有限公司

Quenching unit of aluminum alloy plate and method thereof

ActiveCN101514386AIncrease the depth of hardeningReduce residual stress
Owner:CENT SOUTH UNIV

Mechanized mining method for gently-inclined medium-thick ore body

ActiveCN107869349AContinuous and efficient miningincrease production capacity
Owner:UNIV OF SCI & TECH BEIJING +1

Preparation method of hexamethyl disiloxane

InactiveCN101362777Aavoid waste waterincrease production capacity
Owner:JIANGSU HONGDA NEW MATERIAL

Glutamic acid synergist urea and preparation method thereof

Owner:INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI

Chip support assembly, reaction cavity chamber and semiconductor processing equipment

ActiveCN107305857AImprove heating and cooling efficiencyincrease production capacity
Owner:BEIJING NAURA MICROELECTRONICS EQUIP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products