Processing strategies for single point incremental forming—a CAM approach

Tera, Melania; Breaz, Radu-Eugen; Racz, Sever-Gabriel; Gîrjob, Claudia

doi:10.1007/s00170-018-03275-9

Cited by 18 publications

(13 citation statements)

References 28 publications

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“…The first type is SPIF; the principle of carrying it out is shown in Figure 3 a. The tool is guided by the machine control system along a pre-programmed trajectory, causing incremental deformation of the sheet [ 39 , 40 ]. A variation of SPIF (Figure 4a) is TPIF, which can be performed with the use of a partial die ( Figure 3 b) or a specific matrix ( Figure 3 c).…”

Section: Incremental Sheet Forming Methodsmentioning

confidence: 99%

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

et al. 2021

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Incremental sheet forming of titanium and its alloys has a significant role in modern manufacturing techniques because it allows for the production of high-quality products with complex shapes at low production costs. Stamping processes are a major contributor to plastic working techniques in industries such as automotive, aerospace and medicine. This article reviews the development of the single-point incremental forming (SPIF) technique in titanium and its alloys. Problems of a tribological and microstructural nature that make it difficult to obtain components with the desired geometric and shape accuracy are discussed. Great emphasis is placed on current trends in SPIF of difficult-to-form α-, α + β- and β-type titanium alloys. Potential uses of SPIF for forming products in various industries are also indicated, with a particular focus on medical applications. The conclusions of the review provide a structured guideline for scientists and practitioners working on incremental forming of titanium and titanium alloy sheets. One of the ways to increase the formability and minimize the springback of titanium alloys is to treat them at elevated temperatures. The main approaches developed for introducing temperature into a workpiece are friction heating, electrical heating and laser heating. The selection of an appropriate lubricant is a key aspect of the forming process of titanium and its alloys, which exhibit unfavorable tribological properties such as high adhesion and a tendency to adhesive wear. A review of the literature showed that there are insufficient investigations into the synergistic effect of rotational speed and tool rotation direction on the surface roughness of workpieces.

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Section: Incremental Sheet Forming Methodsmentioning

confidence: 99%

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

et al. 2021

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“…Currently, there is no specific type of technological equipment that is widely accepted for the SPIF process, given that this process is relatively new. The literature mentions the use of four types of technological equipment, namely: articulated industrial robots [6], parallel robotic structures [7], CNC milling machines [8] or specially designed forming machines [9].…”

Section: Fig 1 Spif Process Principlementioning

confidence: 99%

Incremental forming using KUKA KR210-2 industrial robot - research regarding design rules and process modelling

2021

Self Cite

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Incremental sheet forming (ISF) process show a great potential in the manufacturing of small series production or prototype development parts. One of the sheet metal forming process, where the contact between punch and metal sheet is in a single point, is known as single point incremental forming (SPIF). The part is manufacture with a simple tool, known as punch, that performs a series of combined movements on the vertically and horizontally directions. The paper introduces a study regarding the design rules and process modelling of this unconventional process, by means of a KUKA KR210-2 industrial robot as technological equipment able to control the correlated movement of the punch. Supplementary, the design of the experimental layout, the process simulations and the singularity problems are considered.

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“…CAM software systems offer multiple solutions similar to those used in milling that can be successfully implemented also for the toolpath in SPIF processes. Literature features various solutions of two or multiple stage toolpaths that can be implemented for different part shapes [7,13]. The inconvenience in using two or multiple forming paths is that, usually, from one stage to another part deviations should be measured in order to be compensated in the next forming stage.…”

Section: Introductionmentioning

confidence: 99%

Achieving Accuracy Improvements for Single-Point Incremental Forming Process Using a Circumferential Hammering Tool

Nasulea

Oancea

2021

Metals

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The paper presents a novel solution for improving the accuracy of the wall area of parts manufactured by single point incremental forming. Thus, a forming tool with a special design that works according to the principle of circumferential hammering is deployed, with a direct improving effect of the forming conditions and consequently of the dimensional accuracy of the part. The research is focused on an experimental study of frustum-of-cone shapes manufactured from sheet metal blanks of DC05 deep drawing steel of 1 mm thickness. A typical customary technological setup is used for the single point incremental forming process, without any additional elements, and two forming tools, a hemispherical and a special one, which use the circumferential hammering effect. Several preliminary tests using both tools were performed in order to prove that part accuracy can be significantly improved by using the circumferential hammering tool. The research was further expanded to investigate the influence on part wall dimensional accuracy of three factors: tool spindle speed, tool feed rate and part dimensional configuration. Using a full factorial plan of experiments the results of 32 test runs were processed. All parts were machined adequately, free of any material fracturing. Based on the achieved machining accuracy of the part walls, precision mathematical models were developed for the prediction of part dimensional accuracy in those areas. The mathematical models were validated by practice, as the predicted accuracies were matched by the experimental results.

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Processing strategies for single point incremental forming—a CAM approach

Cited by 18 publications

References 28 publications

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

Incremental forming using KUKA KR210-2 industrial robot - research regarding design rules and process modelling

Achieving Accuracy Improvements for Single-Point Incremental Forming Process Using a Circumferential Hammering Tool

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