Burr Formation in Metal Cutting Operations and some Deburring Methods

2013 ◽  
Vol 581 ◽  
pp. 235-240
Author(s):  
János Kodácsy ◽  
András Szabó
Keyword(s):  
Production Process ◽  
Sheet Metal ◽  
Metal Cutting ◽  
Burr Formation ◽  
Formation Mechanisms ◽  
Mechanical Process ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Quality Of Products

Remained burrs on edges of the parts after metal cutting operations may cause many problems in the production process and in the quality of products, therefore the burrs must be completely removed. In the paper, the authors give an outline of the elements and the technical and economical influences of the burr formation, and the characteristics of the burrs and the burr formation mechanisms. The authors present some special processes that are suitable for deburring of small pieces (e.g. Magnetic Abrasive Deburring), and a frequently applied mechanical process: power brushing. The authors have carried out many investigations regarding the magnetic abrasive deburring of small, blanked sheet metal parts, furthermore the machine deburring of large-sized metal workpieces by carbide-reinforced cylindrical brushes. The detailed conditions, data, results and conclusions of these deburring experiments are treated in the paper too.

A Digital System Implement for Aircraft Sheet Metal Cutting

2011 ◽  
Vol 110-116 ◽  
pp. 1637-1642
Author(s):  
Chang Liang Lai ◽  
Chuang Liu ◽  
Xian Jie Zhang
Keyword(s):  
Path Planning ◽  
Sheet Metal ◽  
Metal Cutting ◽  
Digital System ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Cutter Path ◽  
Doubly Curved ◽  
Cutting Path ◽  
Sheet Metal Cutting

For aircraft sheet metal parts digital cutting, this paper uses IDEF0 to structure a digital system integrated with unfolding module, nesting module, cutting path planning module and NC cutting module, then analyzes data organization and process of the system application. In the system, an algorithm for the development of a doubly curved surface onto a plane is adopted, NC cutting process-oriented nesting algorithm is presented and rules of cutter path planning is developed. Furthermore, application examples of key technologies (unfolding, nesting, path cutter planning) are demonstrated and indicate that the system can realize digital cutting for aircraft sheet metal parts quickly and precisely.

Chances and Challenges in Joining by Forming with a Flat Counter Tool

2005 ◽  
Vol 6-8 ◽  
pp. 203-208 ◽  
Author(s):  
Reimund Neugebauer ◽  
R. Mauermann ◽  
Stephan Dietrich
Keyword(s):  
Sheet Metal ◽  
Metal Parts ◽  
Joining By Forming ◽  
Sheet Metal Parts ◽  
New Methods ◽  
Process Reliability ◽  
Conventional Technology ◽  
New Applications

Two new joining methods for sheet metal parts, dieless clinching and dieless rivet-clinching are introduced in this paper. With these methods all formable materials can be joined. Contrary to conventional technology in joining by forming these new methods are working with a flat anvil as a counter tool instead of a contoured die, which has a number of advantages. The process has become simpler, the process reliability is increased, misalignments of the joining tools don’t effect the quality of the connection anymore and even new applications, such as the joining of materials with a limited malleability become possible. Examples of realized connections and FE-calculations of the joining processes are presented.

Comparison of numerical simulation results of sheet metal parts’ production for AutoForm and TriboForm friction models

2020 ◽  
pp. 359-372
Author(s):  
M.A. Petrov
Keyword(s):  
Sheet Metal ◽  
Metal Forming ◽  
Coulomb Friction ◽  
Friction Model ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Friction Models ◽  
The Difference ◽  
Coulomb Friction Model

The results of numerical simulations with two friction models are studied. The fi rst model corresponded the Coulomb friction model and used in AutoForm on default. The second friction model took into account the quality of surface treatment, its roughness and amount of the lubricant and the effect of the asperities’ height evolution. It is used in TriboForm. The results obtained for the second friction model are used to simulate sheet metal forming processes in AutoForm. It is found that the TriboForm friction model affected the results of the drawing operation. The difference in the results increased due to bigger deformation values of the technological operation.

Effect of Different Clamping Modes on Dimples of Sheet Metal Parts in Multi-Point Stretch Forming

2010 ◽  
Vol 44-47 ◽  
pp. 2326-2330
Author(s):  
Xue Chen ◽  
Ming Zhe Li ◽  
Zhong Yi Cai ◽  
Wen Zhi Fu
Keyword(s):  
Transition Zone ◽  
Sheet Metal ◽  
Shape Error ◽  
Stretch Forming ◽  
Thickness Strain ◽  
Zone Length ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Elastic Cushion

Dimples are a typical defect in multi-point stretch forming (MPSF) of sheet metal. Comparison on the numerical simulation of the spherical parts in MPSF with traditional and flexible clamping modes were done, the effects of transition zone length and elastic cushion on the dimples of the spherical parts were studied. The results show that thickness strain of the forming parts using traditional clamping mode is greater than that using flexible clamping mode under the same forming conditions, so the dimpling depth of the former is relatively deeper than that of the latter. With the increasing transition zone length, dimpling gradually becomes shallow. Dimples of the parts are reduced and forming quality of the parts is improved using flexible clamping mode compared with traditional clamping mode under the same transition zone length. The technique of elastic cushion is a method to restrain dimples, and no-dimpling limits of the parts was obtained, the dimples defect can be eliminated using the relatively thinner elastic cushion with flexible clamping mode than that with traditional clamping mode, so the shape error of the parts can be decreased.

Methods of Metal Parts Unfolding

2014 ◽  
Vol 989-994 ◽  
pp. 3310-3313
Author(s):  
Yang Li ◽  
Jie Gang Zhang ◽  
Ji Guang Li ◽  
Yu Chen Li
Keyword(s):  
Sheet Metal ◽  
Metal Structure ◽  
Body Structure ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Metal Parts ◽  
Sheet Metal Parts

There are a variety of sheet metal parts in rocket body structure. The exact length calculation of sheet metal structure work is the key to ensure better quality of product. This paper describes two methods of sheet metal part unfolding which are method of formula and method of software. Two quick unfolding ways using AUTOCAD and EXCEL are described aim at method of formula. Summarize the notes of using Pro/E to unfold aim at method of software. span>Parts Unfolding

Experimental and Numerical Analysis of Blanking for Thin Sheet Metal Parts

2001 ◽  
Vol 4 (3-4) ◽  
pp. 319-333
Author(s):  
Vincent Lemiale ◽  
Philippe Picart ◽  
Sébastien Meunier
Keyword(s):  
Numerical Analysis ◽  
Sheet Metal ◽  
Thin Sheet ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Thin Sheet Metal
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