Non-destructive Test for Control of the Surface Quality of Semi Product at the Automotive Industry

Internal thread processing is an indispensable procedure in manufacture, its processing efficiency and quality become more and more important in modern manufacturing, especially in aerospace and automotive industry. Compared with the traditional process of cut tapping of internal thread, the process of extrusion tapping of internal thread possesses the following advantages: without chip, higher precision, better surface quality, better continuity of metallic, greater efficient, greater strength, longer tool life. This paper firstly introduces the current research status of extrusion tapping of internal thread, elaborates the principle and characteristic of extrusion tapping, analyzes the matal plastic flow law and thread forming characteristic during tapping, then generalizes the influencing law of the key technology on thread forming quality, such as extrusion tap type, lead hole diameter, tapping speed and friction. Furthermore, puts forward some improvement approach to reduce tapping torque and enhance forming quality of internal thread.

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ANALISIS PENGARUH JARAK KAMPUH HASIL PENGELASAN BAJA SS400 TERHADAP SIFAT MEKANIK MATERIAL MENGGUNAKAN METODE GMAW

JURNAL ILMIAH TEKNIK MESIN ◽

10.33558/jitm.v8i2.2183 ◽

2020 ◽

Vol 8 (2) ◽

pp. 57-66

Author(s):

Novi Laura Indrayani ◽

Herry Oktadinata ◽

Ito Suteja

Keyword(s):

Hardness Test ◽

Butt Joint ◽

Test Results ◽

Destructive Test ◽

Microstructure Observation ◽

A Value ◽

Welding Defects ◽

Protective Gas ◽

Non Destructive

Welding techniques have been used extensively in the construction field because welding techniques are a simpler method in the process of connecting steel than using bolts or rivets. Factors that influence the quality of welding results include distance of the seam. The seam distance can affect the increase in heat input value because the wider the seam distance the more filler metal will be used. The purpose of this study was to determine how the effect of variations in the distance of the seam to the mechanical properties of SS400 steel welding material using the GMAW method. SS400 steel welding welding position 2G with variations in the root gap distance of 0 mm, 2 mm and 4 mm using the GMAW method with a type of protective gas 82% Ar + 18% CO2 and ESAB ER70S-6 type welding wire. Single v butt joint type with a seam angle of 60o and 12 mm thick material. In this study several tests were conducted including distortion testing, non-destructive test, tensile, chemical composition, hardness and microstructure observation. The highest distortion test results obtained at a root gap of 4 mm seam, non-destructive test results showed no welding defects in the upper surface of the weld, the optimal tensile testing results were obtained on a sample root gap of 2 mm with a tensile strength value of 413 MPa and fractures that occurred in the base area metal. The highest hardness test results were obtained at a sample root gap of 0 mm ap with a value of 235 HV and the lowest hardness obtained at a root gap of 4 mm with a value of 209 HV.

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Study on the Development of Demagnetizing System for Hub Bearing Inner of Automobile

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.730.312 ◽

2017 ◽

Vol 730 ◽

pp. 312-316

Author(s):

Seung Hyeon You ◽

Sung Hoon Oh

Keyword(s):

Control System ◽

Automatic Processing ◽

Measuring System ◽

Metal Particles ◽

Total System ◽

Destructive Test ◽

Magnetic Measuring ◽

Non Destructive

Demagnetizer has been used in the field of non-destructive test or processing as a tool for removing residual magnetic created on the surface of processed object. In case of residual magnetic left on the part, metal particles around them adhere with each other causing the destruction or abrasion on the part. This study is to develop automatic demagnetizing system for improving the quality of processed items by designing the residual magnetic measuring system, demagnetizing system, and total system to detect magnetic that is derived on parts in the middle of processing in application to bearing process. For this, control system, measuring system, and HMI program that managed them were developed making it feasible to expect the application of them on various automatic processing.

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Investigating the Effects of Powder Mixed Electrical Discharge Machining on the Surface Quality of γ–TiAl Intermetallic

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.488-489.396 ◽

2012 ◽

Vol 488-489 ◽

pp. 396-401 ◽

Cited By ~ 3

Author(s):

B. Jabbaripour ◽

M.H. Sadeghi ◽

Mohammad Reza Shabgard ◽

S. Shajari ◽

H. Hassanpour

Keyword(s):

Silicon Carbide ◽

Surface Quality ◽

Aluminum Powder ◽

Automotive Industry ◽

Electrical Discharge ◽

Electrical Discharge Machining ◽

Machining Parameters ◽

Working Temperature ◽

Corrosion Creep

Due to outstanding properties of γ–TiAl intermetallic such as high resistance against fatigue, oxidation, corrosion, creep, dynamic vibration, high working temperature and also its application in aerospace, automotive industry and turbojet engines; in this paper, powder mixed electrical discharge machining (PMEDM) of γ–TiAl intermetallic by means of different additive powders including aluminum (Al), graphite (Gr), silicon carbide (SiC), chrome (Cr) and iron (Fe) is investigated to compare the output characteristic of surface quality and roughness. The results indicate that aluminum powder produces the best surface finish, followed by silicon carbide, graphite, chrome and iron respectively. The experimental results show that in the determined settings of input machining parameters, aluminum powder can improve the surface roughness of TiAl sample about 32%.

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Extended Non-destructive Testing for Surface Quality Assessment

Adhesive Bonding of Aircraft Composite Structures ◽

10.1007/978-3-319-92810-4_3 ◽

2021 ◽

pp. 119-222

Author(s):

Mareike Schlag ◽

Kai Brune ◽

Hauke Brüning ◽

Michael Noeske ◽

Célian Cherrier ◽

...

Keyword(s):

Quality Assessment ◽

Surface Quality ◽

Non Destructive Testing ◽

Destructive Testing ◽

Electronic Noses ◽

Breakdown Spectroscopy ◽

Reinforced Plastic ◽

Laser Induced Breakdown ◽

Non Destructive

AbstractThis chapter introduces various extended non-destructive testing (ENDT) techniques for surface quality assessment, which are first characterized, then enhanced, and finally applied to assess the level of pre-bond contaminations intentionally applied to carbon fiber reinforced plastic (CFRP) adherends following the procedures described in the previous chapter. Based on two user cases comprising different scenarios that are characteristic of either aeronautical production or repair, the detailed tests conducted on two types of sample geometry, namely flat coupons and scarfed pilot samples with a more complex shape, form the basis for applying the advanced ENDT procedures for the monitoring of realistic and real aircraft parts, as will be described in Chap. 10.1007/978-3-319-92810-4_5. Specifically, the reported investigations were performed to assess the surface quality of first ground and then intentionally contaminated CFRP surfaces using the following ENDT tools: the aerosol wetting test (AWT), optically stimulated electron emission (OSEE), two differently implemented approaches based on electronic noses, laser-induced breakdown spectroscopy (LIBS), Fourier-transform infrared (FTIR) spectroscopy, laser-induced fluorescence (LIF), and laser vibrometry.

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