Research on Single Pass Deep Drawing Spinning Formability of Cup-Shaped Parts

2018 ◽  
Vol 920 ◽  
pp. 77-82 ◽  
Author(s):  
Qin Xiang Xia ◽  
Jin Chuan Long ◽  
Fei Du ◽  
Gang Feng Xiao
Keyword(s):  
Feed Rate ◽  
Deep Drawing ◽  
Evaluation Index ◽  
Single Pass ◽  
Metal Material ◽  
Fillet Radius ◽  
Hollow Part

The deep drawing spinning (DDS) formability of metal material refers to the ability to produce an opened hollow part with a circular blank through DDS without fracture or wrinkling defect. The cup-shaped parts of DP600 were selected as the research object, the coefficient m=d/D0 was put forward as the evaluation index of DDS formability, and the minimum coefficient without the occurrences of wrinkle and fracture is defined as the limit DDS coefficient mlim. The single pass DDS formability of cup-shaped parts was investigated experimentally and the influences of blank thickness, roller feed rate and roller fillet radius on the DDS formability were discussed in detail. The results show that the DDS coefficient decreases with the increasing of blank thickness; fracture or wrinkling occurs easily when the roller feed rate is excessively large or excessively small; the large roller fillet radius is helpful to improve the DDS formability of metal material.

Study on Spinning of Pentagonal Cross-Section Hollow-Part Based on Orthogonal Experiment Design

2011 ◽  
Vol 314-316 ◽  
pp. 783-788 ◽  
Author(s):  
Qin Xiang Xia ◽  
Ying Pin Wang ◽  
Ning Yuan ◽  
Xiu Quan Cheng
Keyword(s):  
Feed Rate ◽  
Thickness Distribution ◽  
Reduction Ratio ◽  
Test Method ◽  
Relative Height ◽  
Forming Quality ◽  
Maximum Reduction ◽  
Fea Simulation ◽  
Hollow Part ◽  
Spinning Force

The investigation of the effect of processing parameters on forming quality has been one of the highlight researches in spinning. The thickness distribution is an important criterion to evaluate the forming quality. Spinning force affects the processing and equipment design greatly. Combining with the FEA simulation and orthogonal test method, taking the maximum reduction ratio in thickness of workpiece and the maximum spinning force as the evaluation criterion, the esequence of the main forming parameters, such as the feed rate and roundness radius of roller, and the relative height of workpiece were analyzed based on an orthogonal scheme of three-factor and three-level. Both FEA simulation and experiment results show that, during the pentagonal section hollow-part spinning, the influence sequence on the maximum reduction ratio in thickness is relative height of workpiece, feed rate and roundness radius of roller; the influence sequence on the maximum spinning force is relative height of workpiece, roundness radius of roller and feed rate.

Visualization of 3D Topography of Grinding Wheel Surface Dressed by Rotary Diamond Dresser

2013 ◽  
Vol 797 ◽  
pp. 751-756 ◽  
Author(s):  
Akihiko Kubo ◽  
M.A.K. Chowdhury ◽  
Shoma Noda ◽  
Junichi Tamaki ◽  
A.M.M. Sharif Ullah
Keyword(s):  
Surface Topography ◽  
Feed Rate ◽  
Velocity Ratio ◽  
Three Dimensional ◽  
Grinding Wheel ◽  
Wheel Surface ◽  
Single Pass ◽  
3D Topography ◽  
Computer Aided

A computer-aided simulation was developed to visualize the three-dimensional topography of a grinding wheel surface dressed by a rotary diamond dresser (RDD), and the effects of up-cut and down-cut dressing on the roughness of the dressed surface were examined to demonstrate the effectiveness of the simulation. In the case of single-pass dressing, the roughness of the grinding wheel surface decreased with decreasing dresser feed rate and approached a constant value depending on the velocity ratio of the RDD to the grinding wheel. In the case of multipass dressing, up-cut dressing provided the grinding wheel with a surface topography which was much more stable than that provided by down-cut dressing.

Surfaces Machined by Micro End-Mills at Constant Chip Load

2010 ◽  
Vol 443 ◽  
pp. 232-237 ◽  
Author(s):  
Jong Leng Liow ◽  
Ulrich Frye
Keyword(s):  
Surface Roughness ◽  
Feed Rate ◽  
Cutting Edge ◽  
End Mill ◽  
Single Pass ◽  
End Mills ◽  
Secondary Cutting ◽  
Chip Load

The surfaces of Al6061, machined by 150 μm two flute micro end-mills, were studied to determine their roughness. The surface roughness, Ra, was less than 100 nm but the Ra/Rz ratio ranged from 0.03–0.12. The surface roughness was found to improve with increasing width of cut and to a lesser extent with increasing feed rate. A single pass of the end-mill was found to produce a smoother surface than two passes over the same surface. The surface roughness was found to correspond to the diameter of the end mill and the slope of the secondary cutting edge. To reduce the surface roughness, smaller diameter end mills and chip loads should be used.

scholarly journals The Deep Drawing of a Flanged Square Hole in Thin Stainless Steel Sheet

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1436
Author(s):  
Tsung-Chia Chen ◽  
Ching-Min Hsu ◽  
Cheng-Chi Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Deep Drawing ◽  
Thin Sheets ◽  
Minimum Thickness ◽  
Element Analysis ◽  
Fillet Radius ◽  
Punch Load ◽  
Square Hole

To manufacture metal products of accurate size and shape by deep drawing requires the precise control of a number of variables. The problem of spring-back after the load has to be avoided, and the prevention of cracks in the product requires careful control of the punch load. In this study, where drawing experiments and simulations were carried out on thin sheets of SUS304 stainless steel, the influence of the scale effect on the thin sheets also needed consideration. This was accomplished by the use of an updated Lagrangian formulation and finite element analysis. Material behavior was simulated using a micro-elastoplastic material model, the performance of which was compared with that of models involving conventional materials. The Dynaform LS-DYNA solver was used for simulation analysis, and pre and postprocessing were carried out to obtain material deformation history as well as to determine thickness change, distribution and material stress, and prepare strain distribution maps. Scaling was necessary to account for the effect of the thickness of the sheet and the relationship between punch load and stroke, the distribution of thickness, stress and strain, and the maximum size (d) of the flanged hole and the maximum height of the flange. The simulation results were compared with experimental results to confirm the accuracy of the three-dimensional finite element analysis of the elastoplastic deformation. The results showed that the size of the fillet radius of the hole (Br) had an effect on the punch load, which increased with an increase in Br. However, the minimum thickness of the formed flange decreased with an increase in Br. The maximum principal stress/strain and height of the flange also increased with an increase in Br. The punch fillet radius (Rp) also had an impact on the process. The punch load decreased with the increase in Rp, while the minimum thickness increased slightly. The average values of the minimum thickness for three models were 0.148, 0.0775, and 0.0374 mm. The forming ratio also had an influence on the process. When the forming limit of the square hole flange was FLR = 0.84, cracking occurred in the corners of the flange, and wrinkles formed over the undrawn area of the sheet. These findings can serve as a valuable reference for the design of deep drawing processes.

scholarly journals Influence of grinding parameters, on the surface quality in the process of single-pass grinding of flute in solid carbide end mill

Mechanik ◽  
2018 ◽  
Vol 91 (10) ◽  
pp. 808-810
Author(s):  
Jan Burek ◽  
Marcin Sałata ◽  
Anna Bazan
Keyword(s):  
Cutting Force ◽  
Surface Quality ◽  
Feed Rate ◽  
Geometrical Structure ◽  
Cutting Speed ◽  
Grinding Wheel ◽  
Grinding Process ◽  
End Mill ◽  
Single Pass ◽  
Solid Carbide

The paper presents analysis of influence cutting speed vs and feed rate vf of single-pas grinding process of flute in solid carbide end mill using diamond grinding wheel with metal bond on the geometrical structure and cutting force Fn.

Characteristics of subsurface inclusions in deep-drawing steel slabs at high casting speed

2015 ◽  
Vol 112 (6) ◽  
pp. 608 ◽  
Author(s):  
Huixiang Yu ◽  
Xiaoxuan Deng ◽  
Xinhua Wang ◽  
Chenxi Ji ◽  
Guosen Zhu
Keyword(s):  
Casting Speed ◽  
Deep Drawing ◽  
High Casting Speed ◽  
Steel Slabs
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