Burr-free cutting edges by notch-shear cutting

Sachnik, Peter; Hoque, Sheikh Enamul; Volk, Wolfram

doi:10.1016/j.jmatprotec.2017.06.003

Cited by 28 publications

(7 citation statements)

References 1 publication

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“…Because of the radial vibration, there is an equivalent gap in the hole, similar to the blanking process, and this gap has a certain effect on the generation of burrs. As shown in Figure 3, assuming that the equivalent clearance is δ s , which is equal to the amplitude of vibration, the expression of burr height H penetrate is shown in Equation ( 1) based on rigid plastic assumptions [42]. Figure 3 shows the h 1 and δ s schematics for the bit breaking through the workpiece material.…”

Section: Prediction Mechanism Model Of Drilling Burr Scalementioning

confidence: 99%

A Novel Sustainable Processing Mode for Burr Classified Prediction of Weak Rigid Drilling Process Using a Fusion Modeling Method

Ding

Zheng

et al. 2022

Sustainability

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Weakly rigid drilling systems, such as the industrial robot, are widely used in aerospace, military, and other fields due to its good flexibility and large scope of operation. However, the weak rigidity can easily cause burrs, seriously affecting the precision of parts and product performance. To reduce the heavy deburring process and to improve continuous production and sustainable processing capacity, accurate prediction of burr quality is a prerequisite. Traditional burr forming theory cannot accurately predict the drilling defects. Data-driven approaches can be independent of prior knowledge and discover relationships between process parameters and machining precision directly from the data structure itself. Therefore, to take advantage of both approaches, a fusion model was established for burr classified prediction. On the one hand, the drilling and burr forming process was firstly modeled, and preliminary classification results for burrs were calculated. On the other hand, according to the measured data, the errors between initial calculation results and actual classification results were obtained and selected as the tag values of dataset, which served as inputs for the error compensation model of burrs. Finally, by training the network of TCN–DNN using the drilling data, the burr classified prediction in a weak rigid hole-making system was realized. Experimental results showed that compared with traditional drilling theory, the prediction accuracy of the proposed model improved by 25%, reaching 91.67%. The results can provide a basis for judging the process of burr post-treatment, which has practical guiding significance. This method is beneficial to reduce the heavy deburring process and to improve sustainable processing capacity.

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Section: Prediction Mechanism Model Of Drilling Burr Scalementioning

confidence: 99%

A Novel Sustainable Processing Mode for Burr Classified Prediction of Weak Rigid Drilling Process Using a Fusion Modeling Method

Ding

Zheng

et al. 2022

Sustainability

View full text Add to dashboard Cite

show abstract

“…Thus, this model is feasible, and its accuracy will be verified in the 4th section. Then, considering the lower limit requirements of downstream customers, the optimal control objective function can be expressed in Formula (7).…”

Section: G F ( )mentioning

confidence: 99%

“…Controlling by experience only is insufficient and does not meet the minimum requirements of strip edge quality, thereby causing the endless emergence of defects, such as buckle edge, burr, and imbalance of cutoff ratio. [5][6][7] Therefore, this situation has become a bottleneck problem in the field of technical research.…”

Section: Introductionmentioning

confidence: 99%

Strip Edge Defects and Comprehensive Control Technology in Trimming Process

et al. 2018

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In the strip trimming process, defects such as buckle edge, burr, and imbalance of cutoff ratio often occur. This study investigated the mechanism of these defects and analyzed the influence of disc shears process parameters, including overlap, clearance, fron and back tension on the quality of strip edge. On this basis, a comprehensive evaluation function of strip trimming quality is proposed. Furthermore, the process parameter optimization technology of the disc shears is developed. Subsequently, an on-line grinding device for strip edge is designed to fundamentally control burr defect. Via field application of this technology and this device, the comprehensive treatment of buckle edge, burr, and imbalance of cutoff ratio is realized. Therefore, improving the quality of finished strip is helpful and has the value of further popularization and application.

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“…Sachnik et al [13] used workpieces DC04, 1.4301, ENAW-6014 and CuSn6 with 1 mm thickness and performed both closed and open cuts with a special progressive die. They mainly investigated the formation of burrs and how they change according to the notch placement on the workpiece.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Notch Depth and Angle in Notch Shear Cutting of Stainless-Steel Sheet

Engin¹

2023

sv-jme

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Piercing is a crucial process in the sheet metal forming industry, and the surface quality of the pierced part is an important parameter that defines the overall quality of the product. However, obtaining a good surface quality is a challenging task that depends on the effect of several process parameters and necessitates the use of non-conventional procedures. Notch shear cutting is a relatively new progressive approach in which the workpiece is indented with a notch form with a predefined notch angle and depth, and then the indented workpiece is subjected to conventional piercing. In this study, conventional piercing and notch shear cutting processes were experimentally performed on 1.4301 stainless steel sheet of 2 mm thickness. Then, finite element (FE) analyses were conducted utilizing Deform-2D software. After ensuring that the experimental and simulation works were consistent with each other, the FE analysis of notch shear cutting was carried out for three distinct notch depths (15 %, 30 %, and 60 % of the workpiece thickness) and six different notch angles (10º, 20º, 30º, 40º, 50º, and 60º). Investigations were performed on shear zone length distributions, which are direct indications of the surface quality on sheared workpieces, crack propagation angles, and required cutting loads. The best surface quality was obtained when the notch angle was set to 50º and the notch depth was set to 15 % of the workpiece thickness. It was also observed that notch angle and notch depth had a certain level of influence on required cutting load.

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Burr-free cutting edges by notch-shear cutting

Cited by 28 publications

References 1 publication

A Novel Sustainable Processing Mode for Burr Classified Prediction of Weak Rigid Drilling Process Using a Fusion Modeling Method

A Novel Sustainable Processing Mode for Burr Classified Prediction of Weak Rigid Drilling Process Using a Fusion Modeling Method

Strip Edge Defects and Comprehensive Control Technology in Trimming Process

Finite Element Analysis of Notch Depth and Angle in Notch Shear Cutting of Stainless-Steel Sheet

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