Research on Ultimate Thinning Rate of Superalloy Spinning

2021 ◽  
Vol 1035 ◽  
pp. 152-160
Author(s):  
Hai Bao Wu ◽  
Fu Long Chen ◽  
De Gui Liu ◽  
Ji Zhen Li ◽  
Jian Fei Wang
Keyword(s):  
High Temperature ◽  
Process Parameters ◽  
Middle Level ◽  
Feed Ratio ◽  
Forming Limit ◽  
Body Parts ◽  
Influence Of Process Parameters ◽  
Process Guidance ◽  
Spinning Process ◽  
Thinning Rate

Spinning forming is an effective method for processing thin-walled rotating body parts. The influence of process parameters on the spinning forming limit of materials was studied for the four high-temperature alloys of GH3044, GH3625, GH3536 and GH4169 used in aero-engines. The results can be used as aero-engine high-temperature alloy parts spinning process and provides experimental basis and process guidance. The research results showed that the forming temperature had a significant effect on the spinning forming performance of superalloy materials. When the temperature increased to 800°C and above, the ultimate thinning rate raised 70%. The ultimate thinning rate of GH4169 was higher than the other three materials and GH3044 and GH3536 was at the middle level, GH3625 was relatively low. At the same time, the feed ratio and the corner radius of the rotary wheel had a certain influence on the ultimate thinning rate of different superalloys. The spinning process needs to select reasonable process parameters according to the actual situation when the spinning is applied to manufacture parts.

scholarly journals Study on Spinning Process Parameters of the Copper Bushing by Tribological Properties and Physical Testing

2021 ◽  
Vol 2083 (2) ◽  
pp. 022084
Author(s):  
Xiaolu Hong ◽  
Hengqiu Xu ◽  
Ying Xu ◽  
Tao Huang ◽  
Yaming Guo ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Process Parameters ◽  
Tribological Properties ◽  
Thermal Simulation ◽  
Feed Ratio ◽  
Mechanical Parts ◽  
Good Strength ◽  
Physical Testing ◽  
Spinning Process ◽  
Thinning Rate

Abstract The bushing is a kind of ring sleeve which acts as a liner outside the mechanical parts, which needs good strength, hardness and fatigue resistance. In this paper, the copper bushing was prepared by spinning forming method, and the process parameters of spinning were explored. According to the results of material thermal simulation and test, the conclusion is that the spinning process of copper bushing needs to be carried out in two passes by reverse spinning method. The thinning rate is 30% and 25% respectively. The gap between the mandrel and the roller is 10mm, the feed ratio is 1mm/r, and the spinning temperature is 250°C.

scholarly journals Effects of the roller feed ratio on wrinkling failure in conventional spinning of a cylindrical cup

2011 ◽  
Vol 225 (11) ◽  
pp. 1991-2006 ◽  
Author(s):  
L Wang ◽  
H Long ◽  
D Ashley ◽  
M Roberts ◽  
P White
Keyword(s):  
Finite Element ◽  
Simulation Models ◽  
Feed Ratio ◽  
Forming Limit ◽  
Explicit Finite Element ◽  
Shell Elements ◽  
Computational Performance ◽  
Spinning Process ◽  
Conventional Spinning ◽  
Cylindrical Cup

In this study, wrinkling failure in conventional spinning of a cylindrical cup has been investigated by using both finite element (FE) analysis and experimental methods. FE simulation models of a spinning experiment have been developed using the explicit finite element solution method provided by the software Abaqus. The severity of wrinkles is quantified by calculating the standard deviation of the radial coordinates of element nodes on the edge of the workpiece obtained from the FE models. The results show that the severity of wrinkles tends to increase when increasing the roller feed ratio. A forming limit study for wrinkling has been carried out and shows that there is a feed ratio limit beyond which the wrinkling failure will take place. Provided that the feed ratio is kept below this limit, the wrinkling failure can be prevented. It is believed that high compressive tangential stresses in the local forming zone are the causes of the wrinkling failure. Furthermore, the computational performance of the solid and shell elements in simulating the spinning process are examined and the tool forces obtained from wrinkling and wrinkle-free models are compared. Finally, the effects of the feed ratio on variations of the wall thickness of the spun cylindrical cup are investigated.

Research on Strong Spinning Process of GH4169 Alloy

2020 ◽  
Vol 993 ◽  
pp. 68-78
Author(s):  
Hai Bao Wu ◽  
Ji Zhen Li ◽  
De Gui Liu ◽  
Jun Sheng Liu
Keyword(s):  
Feed Rate ◽  
High Performance ◽  
Basic Research ◽  
Alloy Sheet ◽  
Test Method ◽  
Forming Process ◽  
Process Guidance ◽  
Spinning Process ◽  
Thinning Rate ◽  
Gh4169 Alloy

In this paper, the basic technology of spin forming process was carried out on the GH4169 alloy sheet by heating and strong spinning. The spheroidal spinability test method was used to study the spinability of the alloy. The effects of the strong spinning process parameters on the ultimate thinning rate, diameter expansion and fracture behavior of GH4169 alloy were analyzed. The research results showed that when the temperature was higher than 800 °C, the ultimate thinning rate of GH4169 alloy was above 80%. At the same time, with the increase of feed rate, the ultimate thinning rate of GH4169 alloy decreased. When the feed rate of the rotary wheel was lower than 200 mm•min-1, the ultimate thinning rate of GH4169 alloy was maintained above 80%. The radius of rotary wheel was strongly influence GH4169 alloy ductility which was confirmed by the picture of fracture. This basic research provides the experimental basis and process guidance for the practical use of GH4169 and other high-temperature alloy sheets to produce high-precision and high-performance spinning parts, which has significant application value.

Spinning Process of D406A Ultra-High Strength Steel

2021 ◽  
Vol 1035 ◽  
pp. 410-417
Author(s):  
De Gui Liu ◽  
Fu Long Chen ◽  
Hai Bao Wu ◽  
Ji Zhen Li ◽  
Jian Fei Wang
Keyword(s):  
Heat Treatment ◽  
High Strength Steel ◽  
High Strength ◽  
Ferrite Matrix ◽  
Forming Limit ◽  
Martensitic Structure ◽  
Ultra High Strength Steel ◽  
Limit Test ◽  
Spinning Process ◽  
Thinning Rate

D406A steel is a medium-carbon low-alloy steel, which has excellent comprehensive mechanical properties. It is widely used in the production of missiles and rocket barrels. In this paper, the spinning forming limit test and the intermediate heat treatment process of ultra-high-strength steel were used to explore the effect of spinning process and heat treatment on the properties of spinning parts. The research results showed that the reduction amount of the material made the material thinning rate approach the limit thinning rate. The final blank wall thickness was reduced from 15 mm to 3.0 mm when the cracking occurred. It was calculated that the material's power spinning limit thinning rate was 80%. The ferrite matrix after spinning showed a streamline distribution characteristic perpendicular to the thinning direction, and the precipitated carbides were uniformly distributed on the surface of the matrix, which had the characteristics of deformation and extension along the streamline. After the heat treatment, the structure of the spinning parts changed continuously. When the structure was quenched and tempered, the martensitic structure can be obtained, and the tempered martensitic structure was smaller. Furthermore a test piece for ultra-high-strength steel spinning technology has been developed, and the solutions discussed for flanging defects in the actual spinning process, and test data for the actual production of ultra-high-strength steel spinning parts accumulated.

scholarly journals Thermo-Kinetic Modelling and Analysis of the Simultaneous Hot Stamping and Quenching of EN AW-6016-T4 Sheet

2016 ◽  
Vol 854 ◽  
pp. 133-139 ◽  
Author(s):  
Manoj Kumar
Keyword(s):  
Process Parameters ◽  
Room Temperature ◽  
Kinetic Modelling ◽  
Hot Stamping ◽  
Positive Influence ◽  
Body Parts ◽  
Limited Information ◽  
Influence Of Process Parameters ◽  
Passenger Vehicles ◽  
Complex Parts

The aluminium alloy AW-6016-T4 sheet is the most widely used alloy for simple-shapeouter body parts for passenger vehicles at room temperature. However, for complex parts, such asthe B-pillar, the room temperature formability of AW-6016-T4 sheet is not sufficient. Simultaneoushot stamping and quenching is a viable alternative, but there is still limited information about theinfluence of process parameters on both the formability during the process and the part strength atthe end of the process. A combination of thermo-kinetic simulation and experiments were used toinvestigate the influence of process parameters in the simultaneous hot stamping and quenchingprocess.Increasing the heating rate from 1 to 100 K s-1 during heating to the solution heat treatment (SHT)temperature was found to have no significant influence on the UTS. However, a SHT time of 4 minis required to achieve highest strength by the end of the process chain. Increasing the amount ofdeformation and cooling rate after SHT have a positive influence on the finished part. PredictedDSC curves and Yield strength values from MatCalc were in good agreement with the experimentalresults.

Influence of Process Parameters on Spinning Force Using Finite Element Analysis and the Taguchi Method

2015 ◽  
Vol 659 ◽  
pp. 666-670
Author(s):  
Thanapat Sangkharat ◽  
Surangsee Dechjarern
Keyword(s):  
Finite Element ◽  
Taguchi Method ◽  
Process Parameters ◽  
Plastic Material ◽  
Element Analysis ◽  
Power Requirement ◽  
Influence Of Process Parameters ◽  
Roller Diameter ◽  
Spinning Process ◽  
Spinning Force

Metal spinning process is widely used for producing complex symmetry components. Main advantage of spinning process is a lower power requirement for large deformation with good surface finish. The aim of this paper is to investigate the influences of spinning process parameters, on spinning force. A three dimensional finite element model of the spinning process of SPCC sheet was successfully developed using elastic-plastic material property. The spinning experiments were carried out on a turning lathe and spinning forces were measure forces using a piezoelectric force transducer. The finite element prediction was compared with the experimental measurements and the results agreed well. Applying the Taguchi method, the effect of four process parameters, i.e. roller diameter, spindle speed, feed rate and feed depth, on spinning force were studied. The Taguchi main effect analysis and ANOVA results show that roller diameter and feed depth are the most important factor influencing the spinning force.

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