scholarly journals A CALCULATION OF POWER FOR FORMING METAL SHEET BY SPIF PROCESS

2009 ◽  
Vol 12 (4) ◽  
pp. 5-17
Author(s):  
Nam Thanh Nguyen ◽  
Dien Khanh Le ◽  
Sy Van Le
Keyword(s):  
Crystal Plasticity ◽  
Manufacturing Process ◽  
Incremental Forming ◽  
Single Point ◽  
Metal Sheet ◽  
Single Point Incremental Forming ◽  
Milling Machine ◽  
Cnc Milling ◽  
Cnc Milling Machine ◽  
Cad Cam

This paper attempts to represent a case of calculating of the energy power that is consumed by CNC milling machine when manufacturing via forming membrane metal sheet by SPIF (Single Point Incremental Forming), the recent manufacturing process of metal sheet forming by drafting a no cutting-edge spheric tip tool on a clamped metal sheet. The calculation is based on the disclocation, the crystal plasticity and the slip of lattices inside the structure of the deformed metal. In the while time there is a series of empirical species of 24 groups batch of workpieces that were also machined by CNC milling machine Bridge Port VMC500, CAD/CAM Lab., FME of HCMUT for checking this calculation on consumed power.

scholarly journals RESEARCH ON THE FORMING ANGLE OF A1050-H14 ALUMINUM MATERIAL PROCESSED BY USING SINGLE POINT INCREMENTAL FORMING TECHNOLOGY (SPIF)

2009 ◽  
Vol 12 (16) ◽  
pp. 72-79
Author(s):  
Nam Thanh Nguyen ◽  
Tuan Dinh Phan ◽  
Cuong Van Vo ◽  
Dien Khanh Le ◽  
Binh Thien Nguyen ◽  
...  
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Metal Sheet ◽  
Single Point Incremental Forming ◽  
Regression Equations ◽  
Cnc Milling ◽  
Cnc Milling Machine ◽  
Forming Technology ◽  
Forming Angle ◽  
Tool Diameter

Single Point Incremental Forming - SPIF is the recent manufacturing process of metal sheet forming by drafting a non-cutting edge sphere-tip tool on a clamped metal sheet. The formability of metal sheet in SPIF is considered by the forming angle (ψ)- the maximum draft angle so that the material is not torn. The experimental research on A1050-H14 aluminum sheet on Bridge Port VMC500-16 CNC milling machine in C1 workshop of the HCMUT in order to find out the regression equations to predict the maximum forming angle in the relation with four most important technology parameters in SPIF: size of the step down z, forming feed vxy, spindle speed n, forming tool diameter d.

CAD/CAM Strategies for a Parallel Kinematics SPIF Machine

2013 ◽  
Vol 554-557 ◽  
pp. 2221-2229 ◽  
Author(s):  
João B.S. Farias ◽  
Miguel A.B.E. Martins ◽  
Daniel G. Afonso ◽  
Sonia R.H. Marabuto ◽  
Jorge A. Ferreira ◽  
...  
Keyword(s):  
Tool Path ◽  
Incremental Forming ◽  
Single Point ◽  
Single Point Incremental Forming ◽  
Cnc Milling ◽  
Parallel Kinematics ◽  
Forming Process ◽  
Advantages And Disadvantages ◽  
Cad Cam ◽  
Five Axis

Single point incremental forming has attracted the interest of researchers in the last decade for the production of prototypes and small batch production of sheet-based parts [1, 2]. This technique allows the manufacture of parts without using expensive die sets. The SPIF (Single point incremental forming) process can be performed on different equipments such as adapted CNC milling machines, serial robots and built proposed machines [3]. Every solution has advantages and disadvantages. This work presents the CAD/CAM strategies for a parallel kinematics SPIF machine, designed and built at the University of Aveiro [3]. This machine brings a new approach to the SPIF industry. The machinery used to perform SPIF operations has limitations in their work volume with limited movements and in the magnitude of applicable forces. With that in mind, this machine was projected to overcome that obstacle, and was provided with a system with 6 degrees of freedom, while maintaining the ability to apply high loads. The disadvantage is the increase in volume occupied by the kinematic system. The manufacture of new parts could be reached out with more flexibility on the chosen tool path. The first step is the product design in the commercial CAD system. Next step is generating the tool path of the forming tool. This step is very important to achieve the desired part shape. It is used a commercial CAM system (EdgeCAM 2012®), which has resources from three up to five axis strategies. The last step is to send the information to the machine’s control system, based on real-time software. This paper will describe each step with more details.

Determination of Technological Forces in the Incremental Forming Process

2013 ◽  
Vol 371 ◽  
pp. 133-137
Author(s):  
Radu Eugen Breaz ◽  
Melania Tera ◽  
Octavian Bologa ◽  
Sever Gabriel Racz
Keyword(s):  
Image Processing ◽  
Theoretical Model ◽  
Data Acquisition ◽  
Incremental Forming ◽  
Single Point ◽  
Cnc Milling ◽  
Forming Process ◽  
Feed Drive ◽  
Cnc Milling Machine

The paper presents a joint theoretical and experimental approach to determine the technological forces within the asymmetric single point incremental forming ASPIF process, based upon a theoretical model, image processing and data acquisition. The first step of this approach was to develop a theoretical model of the forces within the process, based upon the model of a mechanical feed drive of a CNC milling machine. By means of this model, relationships between the resistant torque at the motor spindle level and the technological force on the movement axis could be determined. Using an image processing method, which allowed the user to extract information within the machines operator panel and analytical relationships, the technological forces were determined. The results were compared with the measured values, obtained by means of a data acquisition system.

Study on Forming Behaviour of Friction Stir Welded Blanks During Single Point Incremental Forming (SPIF) Process

2020 ◽  
Author(s):  
Shalin Marathe ◽  
Harit Raval
Keyword(s):  
Friction Stir Welding ◽  
Incremental Forming ◽  
Single Point ◽  
Base Material ◽  
Forming Limit ◽  
Single Point Incremental Forming ◽  
Cnc Milling ◽  
Forming Process ◽  
Friction Stir ◽  
Welding Processes

Abstract The automobile, transportation and shipbuilding industries are aiming at fuel efficient products. In order to enhance the fuel efficiency, the overall weight of the product should be brought down. This requirement has increased the use of material like aluminium and its alloys. But, it is difficult to weld aluminium using conventional welding processes. This problem can be solved by inventions like friction stir welding (FSW) process. During fabrication of product, FSW joints are subjected to many different processes and forming is one of them. During conventional forming, the formability of the welded blanks is found to be lower than the formability of the parent blank involved in it. One of the major reasons for reduction in formability is the global deformation provided on the blank during forming process. In order to improve the formability of homogeneous blanks, Single Point Incremental Forming (SPIF) is found to be giving excellent results. So, in this work formability of the welded blanks is investigated during the SPIF process. Friction Stir Welding is used to fabricate the welded blanks using AA 6061 T6 as base material. Welded blanks are formed in to truncated cone through SPIF process. CNC milling machine is used as SPIF machine tool to perform the experimental work. In order to avoid direct contact between weld seam and forming tool, a dummy sheet was used between them. As responses forming limit curve (FLC), surface roughness, and thinning are investigated. It was found that use of dummy sheet leads to improve the surface finish of the formed blank. The formability of the blank was found less in comparison to the parent metal involved in it. Uneven distribution of mechanical properties in the welded blanks leads to decrease the formability of the welded blanks.

Comparison of the Geometric Accuracy by DSIF Toolpath with SPIF Toolpath

2014 ◽  
Vol 494-495 ◽  
pp. 497-501 ◽  
Author(s):  
Jin Han Wu ◽  
Qiu Cheng Wang
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Metal Sheet ◽  
Single Point Incremental Forming ◽  
Geometric Accuracy ◽  
Forming Process ◽  
Forming Accuracy ◽  
Finite Method

As there is no sufficient support between the single moving tool and fixture, the formed metal sheet is easy to bend in single point incremental forming (SPIF). Double sided incremental forming (DSIF) is proposed in which two tools are used on each side of the sheet to improve the components forming accuracy. Element finite method is introduced to simulate the forming process with both DSIF and SPIF toolpaths and the component geometric accuracies are compared. The simulation result shows the DSIF toolpaths can obtain better geometric accuracy than SPIF.

Experimental Study on a New Method of Double Side Incremental Forming

2008 ◽  
Author(s):  
Yongjun Wang ◽  
Ying Huang ◽  
Jian Cao ◽  
N. Venkata Reddy
Keyword(s):  
Tool Path ◽  
Incremental Forming ◽  
Single Point ◽  
Cnc Milling ◽  
Analysis Model ◽  
Surface Machining ◽  
Cnc Milling Machine ◽  
Geometrical Features ◽  
New Process ◽  
Sheet Metal Incremental Forming

This paper presents a new configuration for sheet metal incremental forming using DSIF (Double Sided Incremental Forming) to overcome the limitation of single point incremental forming (SPIF). The new process can produce geometrical features on either side of the initial plane of the sheet without changing setup. A component having such challenging features is selected to demonstrate the capabilities of the proposed method and a contour tool path is generated using UniGraphics (UG) surface machining module and formed by mounting the new setup on a CNC milling machine. The final formed shape was scanned and compared to the designed profile. In addition, two more components having cylindrical and spherical geometries are formed to study the effect of geometry on the accuracy of the component that can be produced by using the proposed method. A simple analysis model has been developed to explain the effect of squeezing and stretching to the part elongation during the DSIF process.

Investigations about the Single Point Incremental Forming of Anisotropic Titanium Alloy Sheets

2011 ◽  
Vol 264-265 ◽  
pp. 188-193 ◽  
Author(s):  
G. Palumbo ◽  
Marco Brandizzi ◽  
G. Cervelli ◽  
M. Fracchiolla
Keyword(s):  
Tool Path ◽  
Incremental Forming ◽  
Single Point ◽  
Tensile Tests ◽  
Single Point Incremental Forming ◽  
Cnc Milling ◽  
Forming Process ◽  
Fe Simulations ◽  
Shape Errors ◽  
Optical Strain

The present work focuses the attention on the Single Point Incremental Forming (SPIF) of the Titanium (Ti) alloy Ti-6Al-4V. Tensile tests were carried out using the optical strain measurement system Aramis3D, in order to determine the mechanical behaviour of the alloy and to investigate the anisotropy of such alloy. Finite Element (FE) simulations of the SPIF process (using ABAQUS/explicit) were performed using a simple but non-axialsymmetric shape (truncated pyramid) with the aim of investigating the effect of both the tool/pitch ratio (D/p) and the draw angle (α), taking into account the anisotropic behaviour. The analysis of plastic strains and thinning maps, together with the evaluation of shape errors originated by the forming process, highlighted that the parameter D/p plays a key role in the SPIF. Results from the preliminary FE analysis were used for investigating the production by SPIF of an automotive component (car door shell). A specific subroutine was created by the authors for automatically generating the tool path to be used in both the FE simulations and the manufacturing of parts by SPIF on a CNC milling machine.

scholarly journals Image Processing of Surface in Cad/Cam Applications

2018 ◽  
Vol 26 (5) ◽  
pp. 36-47
Author(s):  
Ahmed A. Ebraheem
Keyword(s):  
Image Processing ◽  
Milling Machine ◽  
Cnc Milling ◽  
Original Surface ◽  
Cnc Milling Machine ◽  
3D Surface ◽  
Cad Cam ◽  
Median Operator ◽  
Surface Images

Because of difficulty of Reconstructing 3D surface from the 2D captured images in terms of getting a higher resolution compared with the original surface so it has been adopted treatment of surface images after reconstructing the surface by of assembling all 2D im- ages and apply various filters to get the surface closest to the original surface of the sample under test. Various ways have been applied such as Laplacian and Median. It has been found that Median operator gave the best treatment to the surface where it was adopted to find the toolpath through the surface points for the purpose of machining using a CNC milling machine.  

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