{"id":3597,"date":"2021-04-25T02:04:39","date_gmt":"2021-04-24T23:04:39","guid":{"rendered":"https:\/\/gromov.ua\/services\/sheet-metal-bending\/bending-polished-parts-without-scratches\/"},"modified":"2021-04-25T02:04:40","modified_gmt":"2021-04-24T23:04:40","slug":"bending-polished-parts-without-scratches","status":"publish","type":"page","link":"https:\/\/gromov.ua\/en\/services\/sheet-metal-bending\/bending-polished-parts-without-scratches\/","title":{"rendered":"Bending polished parts without scratches"},"content":{"rendered":"\n<p>One of the most important technological operations in &#13;\nof manufacturing metal products is the bending of sheet metal with &#13;\nUsing bending equipment. As a rule, after bending the metal &#13;\non its surface there are traces (scratches) from the working elements &#13;\nof the bending press &#8211; dies and punches.<\/p>\n\n<p>With conventional bending, it is impossible to avoid side effects such as:<\/p>\n\n<ul class=\"wp-block-list\"><li>scratched product surfaces;<\/li><li>deformation of holes caught in the bending area;<\/li><li>stretched (twisted) edges of the product if during bending the edges of the part are not perpendicular to the bending tool;<\/li><li>not always high bending accuracy.<\/li><\/ul>\n<p>But what about when the customer&#8217;s requirements for the product, &#13;\nThe customer&#8217;s requirements for the product include high bending accuracy and exclude bending marks? &#13;\nbending?<\/p>\n\n<h2 class=\"wp-block-heading\">How to bend parts without marks<\/h2>\n\n<p>There are several technological solutions to ensure &#13;\nbending of metal products without traces (scratches) from the dies. In particular,&#13;\n is bending with the use of: <\/p>\n\n<ul class=\"wp-block-list\"><li>special film and standard matrices;<\/li><li>polymer inserts on standard matrices;<\/li><li>rotabend matrices with rotating inserts;<\/li><li>matrices with polyurethane inserts &#8211; for bending radii.<\/li><\/ul>\n<p>\u00a0Consider in more detail the above bending methods.<\/p>\n\n<h3 class=\"wp-block-heading\">Bending with the use of protective film<\/h3>\n\n<p>Film bending involves placing a protective film over the entire working surface of standard dies using special holders. This method is the cheapest, but it shows excellent results. Namely:<\/p>\n\n<ul class=\"wp-block-list\"><li>prevents bending marks;<\/li><li>is optimal for bending products made of aluminum, stainless steel, painted metal;<\/li><li>does not require any further rework of the parts;<\/li><li>is easy enough to use;<\/li><li>can be used on any standard matrix.<\/li><\/ul>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"438\" src=\"https:\/\/gromov.ua\/wp-content\/uploads\/2020\/07\/plenka_ukb.jpg\" alt=\"scratch-free metal bending film\" class=\"wp-image-1630\" srcset=\"https:\/\/gromov.ua\/wp-content\/uploads\/2020\/07\/plenka_ukb.jpg 800w, https:\/\/gromov.ua\/wp-content\/uploads\/2020\/07\/plenka_ukb-600x329.jpg 600w, https:\/\/gromov.ua\/wp-content\/uploads\/2020\/07\/plenka_ukb-300x164.jpg 300w, https:\/\/gromov.ua\/wp-content\/uploads\/2020\/07\/plenka_ukb-768x420.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption>film for bending polished products without marks<\/figcaption><\/figure>\n<h3 class=\"wp-block-heading\">Bending with polymer inserts<\/h3>\n\n<p>Bending with polymer inserts involves the use of &#13;\nspecial composite inserts on standard matrices. Technologically &#13;\nis a more expensive way of bending, because for each die &#13;\ndie, a separate insert has to be selected. At the same time, the main &#13;\nadvantage of this type of bending is a high accuracy of bends and, of course &#13;\nThe main advantage of this type of bending is a high precision of bends, of course, the absence of scratches on the metal surfaces.<\/p>\n\n<h2 class=\"wp-block-heading\">Bending without traces with Rotabend dies<\/h2>\n\n<p>The most expensive, but at the same time the most technologically advanced and high-quality bending process is bending with the use of Rotabend dies with rotating inserts (TRUMPF, UKB, WILA) in the base of the die arm. These dies have two spring-loaded moving hemispheres that are installed on top of the die body. During bending, a sheet of metal is placed on the flat surface of the hemispheres, and then, when lowering the punch, the hemispheres are rotated, repeating the movements of the workpiece. Moving hemispheres of matrixes thus support the sheet on a large contact area, in contrast to conventional V-matrixes, when during bending the product is in contact with two points on the edges of the shoulder of the matrix. The main advantage of this scratch-free bending method is the possibility to obtain a minimum shelf of the sheet, as well as the absence of deformation when bending a perforated metal sheet.<\/p>\n\n<h3 class=\"wp-block-heading\">Radius bending without marks <\/h3>\n\n<p>In case it is necessary to bend a part with a certain radius, the most effective method is the use of dies. &#13;\nThe most effective method is the use of dies with polyurethane inserts. &#13;\npolyurethane inserts. This technology makes it possible to obtain radius &#13;\nbending of metal with observance of any parameters of the radius or angle.<\/p>\n\n<p>As we can see, each of these methods has its own advantages, but they have&#13;\n The one thing that unites them is the absence of bending marks (scratches) &#13;\non the products.<\/p>\n\n<p>LLC &#8220;Gromov&#8221; performs sheet metal bending without traces of matrixes (without scratches).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most important technological operations in &#13; of manufacturing metal products is the bending of sheet metal with &#13; Using bending equipment. As a rule, after bending the metal &#13; on its surface there are traces (scratches) from the working elements &#13; of the bending press &#8211; dies and punches. With conventional bending, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":617,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-usluga.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-3597","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bending polished parts without scratches | Gromov - laser sheet metal cutting. 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