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不銹鋼加工成型時(shí)變形回彈怎么辦?

日期:2025-07-03 13:48
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摘要:<span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">不銹鋼加工成型時(shí)變形回彈怎么辦?</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼的回彈的確麻煩,跟很多原因有關(guān)系。硬度方面,硬度越大,回彈越大。上次用了</span><span style="font-family:'Times New Roman';"><span lang="EN-US">301-EH</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">料,回彈放到</span><span style="font-family:'Times New Roman';"><span lang="EN-US">14</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">度。彎曲半徑料厚與料厚比:比值越大,回彈越大。</span><span style="font-family:'Times New Roman';"><span lang="EN-US">SUS301</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">比</span><span style="font-family:'Times New Roman';"><span lang="EN-US">SUS304</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">回彈大,相同情況下,</span><span style="font-family:'Times New Roman';"><span lang="EN-US">304</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">比</span><span style="font-family:'Times New Roman';"><span lang="EN-US">301</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">回彈小</span><span style="font-family:'Times New Roman';"><span lang="EN-US">2</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">度。另外日本</span><span style="font-family:'Times New Roman';"><span lang="EN-US">301</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">比臺(tái)灣料回彈要大。成型方式也有差異。一步成型的回彈比多次成型的回彈要大。試模后修正,差多少度改多少度,而且要注意回彈有角度回彈和半徑回彈,具體情況具體分析了。當(dāng)然如果技師的技術(shù)好,會(huì)錯(cuò)位來(lái)調(diào)整,調(diào)整好后通知設(shè)計(jì)進(jìn)行相應(yīng)更改。一般每次移</span><span style="font-family:'Times New Roman';"><span lang="EN-US">5</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">條來(lái)試,這個(gè)就是靠技師的技術(shù)和經(jīng)驗(yàn)了。由于不銹鋼自身屈服點(diǎn)高,不銹鋼板折彎加工要點(diǎn)。硬度高,冷作硬化效應(yīng)顯著。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">延伸率低,因?qū)嵝员绕胀ǖ吞间摬?。?dǎo)致所需變形力大</span><span style="font-family:'Times New Roman';"><span lang="EN-US">;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼板料在折彎時(shí)與碳鋼相比有強(qiáng)烈的回彈傾向</span><span style="font-family:'Times New Roman';"><span lang="EN-US">;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼板相對(duì)于碳鋼由于延伸率低,折彎時(shí)工件折彎角</span><span style="font-family:'Times New Roman';"><span lang="EN-US">R</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">要大于碳鋼,否則有出現(xiàn)裂紋的可能</span><span style="font-family:'Times New Roman';"><span lang="EN-US">;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">由于不銹鋼板硬度高,冷作硬化效應(yīng)顯著因此在選擇壓彎刀具時(shí)要選擇熱處置硬度應(yīng)達(dá)到</span><span style="font-family:'Times New Roman';"><span lang="EN-US">60HRC</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">以上的工具鋼,其外表粗糙度要比碳鋼的壓彎刀具高一個(gè)數(shù)量級(jí)。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">一般來(lái)說(shuō)單位尺寸下,根據(jù)以上特性。板材越厚,所需折彎力越大,而且隨著板厚增大在選擇折彎設(shè)備時(shí)折彎力的裕量應(yīng)該更大</span><span style="font-family:'Times New Roman';"><span lang="EN-US">;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">單位尺寸下,抗拉強(qiáng)度越大,延伸率越小,所需折彎力越大,折彎角應(yīng)該越大</span><span style="font-family:'Times New Roman';"><span lang="EN-US">;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">設(shè)計(jì)圖中板厚與折彎半徑對(duì)應(yīng)情況下,根據(jù)經(jīng)驗(yàn),一道彎工件的展開(kāi)尺寸為直角邊相加減去兩個(gè)板厚,完全可以滿足設(shè)計(jì)精度要求。根據(jù)經(jīng)驗(yàn)公式計(jì)算展開(kāi)量可簡(jiǎn)化計(jì)算過(guò)程大大提高生產(chǎn)效率</span><span style="font-family:'Times New Roman';"><span lang="EN-US">;</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">材質(zhì)的屈服強(qiáng)度越大,彈性回復(fù)量就越大,為獲得折彎件</span><span style="font-family:'Times New Roman';"><span lang="EN-US">90</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">度的角度,所需壓刀的角度就要設(shè)計(jì)的越小。相對(duì)于碳鋼相同板厚的不銹鋼折彎角較大,這一點(diǎn)應(yīng)特別注意否則會(huì)出現(xiàn)壓彎裂紋,影響工件強(qiáng)度。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span lang="EN-US"><span style="font-family:'Times New Roman';font-size:small;">&nbsp;</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span>

不銹鋼加工成型時(shí)變形回彈怎么辦?

不銹鋼的回彈的確麻煩,跟很多原因有關(guān)系。硬度方面,硬度越大,回彈越大。上次用了301-EH料,回彈放到14度。彎曲半徑料厚與料厚比:比值越大,回彈越大。SUS301SUS304回彈大,相同情況下,304301回彈小2度。另外日本301比臺(tái)灣料回彈要大。成型方式也有差異。一步成型的回彈比多次成型的回彈要大。試模后修正,差多少度改多少度,而且要注意回彈有角度回彈和半徑回彈,具體情況具體分析了。當(dāng)然如果技師的技術(shù)好,會(huì)錯(cuò)位來(lái)調(diào)整,調(diào)整好后通知設(shè)計(jì)進(jìn)行相應(yīng)更改。一般每次移5條來(lái)試,這個(gè)就是靠技師的技術(shù)和經(jīng)驗(yàn)了。由于不銹鋼自身屈服點(diǎn)高,不銹鋼板折彎加工要點(diǎn)。硬度高,冷作硬化效應(yīng)顯著。

延伸率低,因?qū)嵝员绕胀ǖ吞间摬睢?dǎo)致所需變形力大;不銹鋼板料在折彎時(shí)與碳鋼相比有強(qiáng)烈的回彈傾向;不銹鋼板相對(duì)于碳鋼由于延伸率低,折彎時(shí)工件折彎角R要大于碳鋼,否則有出現(xiàn)裂紋的可能;由于不銹鋼板硬度高,冷作硬化效應(yīng)顯著因此在選擇壓彎刀具時(shí)要選擇熱處置硬度應(yīng)達(dá)到60HRC以上的工具鋼,其外表粗糙度要比碳鋼的壓彎刀具高一個(gè)數(shù)量級(jí)。

一般來(lái)說(shuō)單位尺寸下,根據(jù)以上特性。板材越厚,所需折彎力越大,而且隨著板厚增大在選擇折彎設(shè)備時(shí)折彎力的裕量應(yīng)該更大;單位尺寸下,抗拉強(qiáng)度越大,延伸率越小,所需折彎力越大,折彎角應(yīng)該越大;設(shè)計(jì)圖中板厚與折彎半徑對(duì)應(yīng)情況下,根據(jù)經(jīng)驗(yàn),一道彎工件的展開(kāi)尺寸為直角邊相加減去兩個(gè)板厚,完全可以滿足設(shè)計(jì)精度要求。根據(jù)經(jīng)驗(yàn)公式計(jì)算展開(kāi)量可簡(jiǎn)化計(jì)算過(guò)程大大提高生產(chǎn)效率;材質(zhì)的屈服強(qiáng)度越大,彈性回復(fù)量就越大,為獲得折彎件90度的角度,所需壓刀的角度就要設(shè)計(jì)的越小。相對(duì)于碳鋼相同板厚的不銹鋼折彎角較大,這一點(diǎn)應(yīng)特別注意否則會(huì)出現(xiàn)壓彎裂紋,影響工件強(qiáng)度。

 

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