The Relationship of Burr Height and Blanking Force with Clearance in the Blanking Process of AA5754 Aluminium Alloy

Çavuşoğlu, Onur; Gürün, Hakan

doi:10.21278/tof.41105

Cited by 10 publications

(5 citation statements)

References 7 publications

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“…The important factor in the quality of the hole after piercing is measured by the hole diameter, circularity, rollover depth, fracture depth, burr height, fracture angle, and smoothsheared depth [48][49][50][51]. In the holes produced by the HT punches as compared to the DCT punches, the following was observed: the rollover depth, burr height, and fracture angle increased by 54%, 27.3%, and 5.1%, respectively, but the fracture depth decreased by 2.5%.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Cryogenic Treatment on the Punch Wear and the Hole Edge Geometry

Arslan

2020

TFAMENA

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The ball joint parts made of forged steel are quite important in the suspension system. The quality of production of ball joint parts is very important because of their role. Some basic defects can be found in the hole edge form. These defects affect the hole quality of ball joint parts. In this study, the effects of cryogenic processing on the wear of AISI D2 punches and the effects of punch wear on the hole edge geometry of hot forged AISI 1040 steel ball joint parts were investigated. The hole geometry changes are generally associated with punch wear and process parameters. For the purpose of investigation, piercing was carried out using an eccentric press with AISI D2 tool steel punches on 6.0 mm-thick ball joint pieces. The punches were traditionally heat treated. Some of the punches were cryogenic-treated at -145 °C in addition to the conventional heat treatment. Weight loss values were measured to assess the punch wear, and SEM and OM images were analysed. At the end of the industrial piercing process, it was found that the D2 tool steel punch wear decreased with cryogenic process applied and the size changes in the hole edge geometry of the punched 1040 hot forged steel parts turned out to be less marked.

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Section: Resultsmentioning

confidence: 99%

The Effect of Cryogenic Treatment on the Punch Wear and the Hole Edge Geometry

Arslan

2020

TFAMENA

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“…To obtain the best product quality and with the minimum required force required for the blanking/piercing of the magnesium alloys, three punches cut with different cutting edges and the best clearance value selected according to the previous studies were used (Tekiner et al, 2006, Çavuşoğlu and Gürün, 2016, Çavuşoğlu and Gürün, 2017. Stereo microscopy was employed to analyze the cross sections and sheared surfaces of samples after punching.…”

Section: Table 2 Applied Rolling Schedulementioning

confidence: 99%

“…On the other hand, increasing clearance value enhances the burr height and negatively affects the quality of the product obtained (Çavuşoğlu and Gürün, 2016). The sheet material thickness is also an important parameter that affects burr formation and blanking force (Çavuşoğlu and Gürün, 2017). In industrial applications, selection of the punch shape depends on the intended use of the obtained parts.…”

Section: Introductionmentioning

confidence: 99%

The Experimental Investigation of Punching of the AM60 and AZ61 Magnesium Alloy Sheets by Using Varied Punch Shapes

Çuğ

Khalifa²,

Gürün

2021

JER is an international, peer-reviewed journal that publishes f

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The using of magnesium alloys for industrial sheet metal part production has become increasingly common in recent years. This research aims to characterize the effects of the cutting-edge shapes of the punches on the blanking forces and the sheared edge qualities in the blanking/piercing operations of magnesium alloy sheets. Magnesium sheets (AM60 and AZ61) were produced by casting and rolling processes. AM60 and AZ61 Mg alloys produced by casting were rolled by using two different speeds, 2.5 m/min and 7.5 m/min. Material thickness was adjusted to three mm in the rolling process. Blanking tests were carried out on a die-set and hydraulic press by varying shaped punches. In the experimental studies, flat-ended, concave shaped, and 16° angled punches were used. A loadcell was fixed to the experimental setup to determine the blanking forces. The results showed that the AM60 alloy was more resistant to shearing than the AZ61. The lowest blanking force was obtained by use of the 16° angled punch. It was determined that the using of flat-ended punches for blanking operations was more convenient according to the usage purpose of the parts while all three punches can be used for piercing operations.

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“…Due to severe market competition, industries are engaged in research and development activities to increase the tool life and to reduce machining cost and lead time. The quality and dimensions of workpieces produced by the sheet metal cutting operations blanking and piercing depend on factors such as tool design, material properties, operating conditions, and especially punch wear [1][2][3]. Punches and dies are exposed to heavy loads and wear occurs due to adhesion and abrasion on cutting edges during the stamping of parts, especially from heat-treated steel blanks.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Wear Resistance of D-3 Piercing Punches by Applying Cryogenic Treatment: Field and Laboratory Investigations

Sekar

Murugesan²

2018

TFAMENA

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Due to excessive shearing and load, punches wear faster than dies in press tools used for cutting operations. The shape and size of components produced by worn punches pose challenges; hence efforts are being taken by industries to extend the punch life and to reduce the cost and time of replacement of punches. The paper reports on an attempt made to investigate effects of cryogenic treatment and tempering cycles on wear life enhancement of D-3 tool steel specimens and punches. Four differently treated groups of D-3 piercing punches and pins were tested in the manufacture of AISI 1055 medium carbon steel chain parts and pinon-disk wear tests were carried out. The punch wear was assessed by capturing images of the punch tips using a machine vision system after manufacturing several chain components and the image processing technique was used in assessing the wear. Scanning electron microscopy (SEM) and optical microscopy (OM) images of the D-3 specimens were also taken to study effects of the cryogenic treatment. The results show improved wear resistance of the cryogenically treated punches compared to the conventionally heat-treated punches.

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The Relationship of Burr Height and Blanking Force with Clearance in the Blanking Process of AA5754 Aluminium Alloy

Cited by 10 publications

References 7 publications

The Effect of Cryogenic Treatment on the Punch Wear and the Hole Edge Geometry

The Effect of Cryogenic Treatment on the Punch Wear and the Hole Edge Geometry

The Experimental Investigation of Punching of the AM60 and AZ61 Magnesium Alloy Sheets by Using Varied Punch Shapes

Enhancement of Wear Resistance of D-3 Piercing Punches by Applying Cryogenic Treatment: Field and Laboratory Investigations

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