{"id":23200,"date":"2024-12-28T10:02:07","date_gmt":"2024-12-28T02:02:07","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=23200"},"modified":"2024-12-28T10:13:37","modified_gmt":"2024-12-28T02:13:37","slug":"cutting-tool-performance","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/ko\/cutting-tool-performance\/","title":{"rendered":"\uc808\uc0ad \uacf5\uad6c \uc131\ub2a5\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574 \uacbd\uacc4 \ub178\uce58\uc5d0 \uc800\ud56d\ud558\ub294 \ubc29\ubc95\uc740?"},"content":{"rendered":"
The wear and boundary notch of cemented carbide cutting tools are often found in the machining.They directly influence machining quality of the machined\u00a0workpiece and the cutting performance and life of the cutter.Especially,in the\u00a0precision machining,flexible manufacturing system(FMS)and other automation\u00a0manufacture,wear and boundary notch behaviors of cemented carbide tools are even\u00a0more important.Metal cutting experiences have expounded that wear and boundary\u00a0notch of the cemented carbide cutting tools are more serious in the machining of thework\u00a0piece in which the strain hardening is high and the remaining is not even.It\u00a0seriously influences the machining quality of the machined piece and the cutting\u00a0performance and life of the cutter.But,so far,there has not been much research on\u00a0the boundary notch mechanism of cemented carbide cutting cutter,and the technical\u00a0measures to reduce boundary notch of cemented carbide cutting tools are fewer.So that,the based on the machining experiments of friction welded joint,this research\u00a0focuses on the forming processes and main rules of the boundary notch,and has developed several measures to resist or lessen boundary notch,which provides a\u00a0theoretical and experimental base to ensure cutting performances of cutters and machining quality.<\/p>\n

2 The forming process and main characteristics of boundary notch in cemented carbide cutting tools<\/h1>\n

The boundary notch of cemented carbide cutting tools is a wear area,which is\u00a0relatively large,resulting from friction between main cutting edge and the surface of\u00a0the workpiece as the following Fig.1.Fig.1(a)shows a traditional wearing type of the\u00a0flank.The rake face A,and flank face Aa\u00a0are also shown.Fig.1 (b)shows the main\u00a0dimension of boundary notch of the lathe tool,in which VN represented the height of\u00a0boundary notch and C refers to the width.It is apparent that the greater the\u00a0dimensions of VN and C are,the greater it destroys the performance of tools and influences the machining quality.<\/p>\n

By experiment,the forming process of the boundary\u00a0notch can be divided into the\u00a0following three steps:firstly,several micro cracks are produced at main cutting edge.Secondly,the mesh fractures are found in the boundary areas and they will spread.<\/p>\n

Finally,the piece material will be denuded and the boundary notch is formed.In the\u00a0subsequent cutting process,the dimension of the boundary becomes bigger and\u00a0bigger.<\/p>\n

Fig.2 shows the forming process of boundary notch of the cemented carbide\u00a0cutting\u00a0tools.<\/p>\n

Main factors to influence boundary notch are mechanical performance of the\u00a0piece material,the cutter material,and geometry parameter of the cutter.The\u00a0following experiments were carried out in order to expound the forming mechanism\u00a0and evolution rules of the boundary notch.<\/p>\n

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3 Experiment conditions and testing measures for assessing boundary notch in cemented carbide cutting tools<\/a><\/h1>\n

The lathe C6130 and reversible cutting tool are used in the experiment.Five\u00a0cutter materials are employed.Main mechanical parameters of cutter material are\u00a0shown in Table 1.<\/p>\n

The machining piece is the friction-welded line of the single hydraulic pillar.The\u00a0width of the welded line is 15mm and the machining allowance is 5.5mm.Besides,the above pillar is welded with 270SiMn and 45#steel.The relatively mechanical\u00a0performances of the welded line are shown in Table 2.<\/p>\n

Based on manufacturing experience and relative information in China and other\u00a0countries about similar machining process,the chosen machining and tool geometry\u00a0parameters are shown in Table 3.<\/p>\n

The boundary notch dimensions of the cemented carbide cutting tools (boundary\u00a0notch height VN and width C are directly attained by tool microscope.In order to\u00a0ensure reliability of the results,repeated experiments are carried out.The recurrent\u00a0performance is good.<\/p>\n

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Influences of Cutting angles<\/h1>\n

Influences of Cutting Edge Angle<\/h2>\n

The results of the variety boundary notch are shown as in Fig.4 when the cutting\u00a0edge angle is changed.From Fig.4 we can find that,with the lessening of the cutting\u00a0edge angle Kr,the dimensions of the boundary notch decrease.The reason is that\u00a0with the lessening of the cutting edge angle Kr,the length of the cutting edge that\u00a0acts on cutting becomes larger and the average loads on the cutting edge be\u00a0come\u00a0lighter.<\/p>\n

Influences of Cutter Corner Radius r<\/h2>\n

The results of the variety boundary notch with the cutter corner changing are\u00a0shown as Fig.5.The boundary notch dimension decreases with the cutter corner radius\u00a0are becoming lesser.The reason is that with the increasing of the cutter corner radius,the impact-resistance performance.<\/p>\n

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Therefore,under the same cutting conditions,boundary notch dimensions (VN,C)decrease\u00a0when the cutter corner radius becomes lesser.<\/p>\n

Influences of Negative Chamfer bal in cutting tool<\/h2>\n

The experiment results of the variety boundary notch are shown as in Fig.6 when\u00a0the width of the negative chamfer is changed.The dimension of the boundary notch\u00a0will decrease when the width of the negative chamfer ba decreases.Therefore,in\u00a0order to resist or decrease the cutter boundary notch,the lesser negative chamfer bal should be chosen.<\/p>\n

Deburring Machining Process<\/h1>\n

The burrs have some influences on cutter boundary notch in metal machining\u00a0process.A deburring cutter is chosen to decrease the adverse influence on cutter.A\u00a0different result between deburring machining process and common machining process\u00a0is shown as in Fig.7.It can be seen that about 75%of the boundary notch is\u00a0decreased.So,burr is a main factor to produce and increase the boundary notch of the\u00a0cutter.<\/p>\n

\"cutting<\/p>\n

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\uacb0\ub860<\/h1>\n

From above experimental research and theoretical analysis,the following\u00a0conclusions are attained:<\/p>\n

1)Boundary notch of the cutting tool<\/a> can be expressed by boundary notch height\u00a0VN and boundary notch width C.The forming processes of boundary notch can be\u00a0divided into three steps:micro-tipping appears firstly;Then,mesh fractures expand;Finally,boundary notch results.<\/p>\n

(2)Main factors that influence boundary notch of cemented carbide cutter are\u00a0piece material,cutter material and cutter geometry parameters.<\/p>\n

(3)Deburring machining process and adjusting cutting tool geometry parameters(to reduce edge angle K,and width of negative chamfer ba,to increase cutter corner\u00a0radius re)can be chosen to decrease effectively boundary notch,which ensures the\u00a0quality of workpiece and cutting\u00a0performances of cutting tool.<\/p><\/div>\n

<\/p>","protected":false},"excerpt":{"rendered":"

The wear and boundary notch of cemented carbide cutting tools are often found in the machining.They directly influence machining quality of the machined\u00a0workpiece and the cutting performance and life of the cutter.Especially,in the\u00a0precision machining,flexible manufacturing system(FMS)and other automation\u00a0manufacture,wear and boundary notch behaviors of cemented carbide tools are even\u00a0more important.Metal cutting experiences have expounded that wear…<\/p>","protected":false},"author":2,"featured_media":23178,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-23200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cutting-tools-weekly"],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2024\/12\/\u56fe\u72472-3.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/posts\/23200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/comments?post=23200"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/posts\/23200\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/media\/23178"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/media?parent=23200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/categories?post=23200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ko\/wp-json\/wp\/v2\/tags?post=23200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}