{"id":1331,"date":"2020-07-29T02:21:36","date_gmt":"2020-07-29T02:21:36","guid":{"rendered":"https:\/\/zawiiw746w.wpdns.site\/?p=1331"},"modified":"2021-11-26T02:48:45","modified_gmt":"2021-11-26T02:48:45","slug":"metal-bending","status":"publish","type":"post","link":"https:\/\/www.scoson.com\/es\/metal-bending\/","title":{"rendered":"Doce resoluci\u00f3n de problemas en el doblado de chapa"},"content":{"rendered":"

Sheet metal processing<\/a> only metal materials use for sheet bending, pressure riveting, welding and a series of treatment processes. The bending and forming process of the metal plate is operated by a bending machine, and there will be a certain rebound in the bending, and the bending angle of the metal is slightly larger than the required angle.<\/p>\n\n\n\n

The following are the problems and solutions encountered in the bending process of sheet metal processing<\/p>\n\n\n\n

Question: The axis on both sides is not centered after bending<\/h3>\n\n\n\n

Cause<\/strong>: Material rebound will change the bending angle to cause the center line to shift
Soluci\u00f3n<\/strong>: 1. Increase the calibration process 2. Improve the bending mode structure and reduce material rebound<\/p>\n\n\n\n

Question: The curved edge is not straight and the size is unstable<\/h3>\n\n\n\n

Causas<\/strong>: 1. No line pressure or pre-bending warning was arranged during the design process
2. Insufficient material pressure
3. The circular wear of convex and concave molds is asymmetrical or the bending force is uneven
4. The height is too small
Soluci\u00f3n<\/strong>:1. Design pressing line or pre-bending process
2. Increase pressure
3. Uniform gap between convex and concave molds, rounded and polished<\/p>\n\n\n\n

4.The height size cannot be less than the minimum limit size<\/p>\n\n\n\n

Question: There are scratches on the outer surface of the sheet metal plate after bending<\/h3>\n\n\n\n

Causas<\/strong>: 1. The surface of the finished material is not smooth
2. The bending radius of the punch is too small<\/p>\n\n\n\n

3.The bending gap is too small<\/p>\n\n\n\n

Soluci\u00f3n<\/strong>:1. Improve the smoothness of convex and concave molds 2 Increase the bending radius 3 Adjust the bending gap<\/p>\n\n\n\n

Question: The l\u00ednea de flexi\u00f3n<\/a> is not parallel to the center of the two holes<\/h3>\n\n\n\n

Cause<\/strong>: When the bending height is less than the minimum bending limit height, external expansion occurs in the bending part<\/p>\n\n\n\n

Soluci\u00f3n<\/strong>: 1. Increase the height of the curved part 2. Improve the bending process<\/p>\n\n\n\n

Question: Cracks in the bending corner<\/h3>\n\n\n\n

Causas<\/strong>: 1. The inner radius of the bend is too small<\/p>\n\n\n\n

  1. The grain direction of the material is parallel to the bending line<\/li>
  2. The burrs of the sheet face outwards<\/li>
  3. Poor metal plasticity<\/li><\/ol>\n\n\n\n

    Soluci\u00f3n<\/strong>: 1. Increase the bending radius of the punch<\/p>\n\n\n\n

    1. Change the blanking layout<\/li>
    2. The burrs become rounded corners in the piece<\/li>
    3. Anneal or use soft materials<\/li><\/ol>\n\n\n\n

      Question: Extrusion and thinning of curved surfaces<\/h3>\n\n\n\n

      Causas<\/strong>: 1. The fillet is too small. 2 The gap between the punch and the die is too small<\/p>\n\n\n\n

      Soluci\u00f3n<\/strong>: 1. Increase the fillet radius 2. Correct the gap between the punch and the die<\/p>\n\n\n\n

      Question: Deformation of the hole due to bending<\/h3>\n\n\n\n

      Cause<\/strong>: When using elastic bending and positioning holes, the outer side of the bending arm is pulled due to the friction between the surface of the die and the outer surface of the workpiece, causing the positioning hole to deform.<\/p>\n\n\n\n

      \n

      Soluci\u00f3n<\/strong>: 1. Use shape bending<\/p>\n\n\n\n

      1. Increase the pressure on the roof<\/li>
      2. Add a decorative plate on the top plate to increase friction and prevent sliding during bending.<\/li><\/ol>\n<\/div>\n\n\n\n

        Question: The end surface of the workpiece is convex or uneven<\/h3>\n\n\n\n

        Cause<\/strong>: When the outer surface of the material is bent, the outer surface of the material shrinks and deforms in the circumferential direction, and the inner surface is compressed in the circumferential direction to produce elongation deformation, so that the curved end surface causes a convex appearance in the bending direction .<\/p>\n\n\n\n

        Soluci\u00f3n<\/strong>:1. In the final stage of stamping, the workpiece should have enough pressure.<\/p>\n\n\n\n

        1. Make the concave corner radius correspond to the rounded corner of the part<\/li>
        2. Process flow improvement<\/li><\/ol>\n\n\n\n

          Question: The bottom of the concave part is not flat<\/h3>\n\n\n\n

          Cause<\/strong>: 1. The material itself<\/p>\n\n\n\n

          1. The contact area between the top plate and the material is small or the ejecting force is insufficient.<\/li>
          2. No top device<\/li><\/ol>\n\n\n\n

            Soluci\u00f3n<\/strong>: 1. Leveling materials<\/p>\n\n\n\n

            1. Adjust the top material device to increase the top material force<\/li>
            2. Add ordering device or correction<\/li>
            3. Plus the shaping process<\/li><\/ol>\n\n\n\n

              Question: The part with notch is bent downward<\/h3>\n\n\n\n

              Cause<\/strong>: The two straight sides open to the left and right and deflect the bottom of the workpiece<\/p>\n\n\n\n

              Soluci\u00f3n<\/strong>: 1. Improve the structure<\/p>\n\n\n\n

              1. Increase the process retention force at the incision, connect the incision, and cut the process after bending.<\/li><\/ol>\n\n\n\n

                Question: The dimensional accuracy of the hole cannot be guaranteed after bending<\/h3>\n\n\n\n

                Causas<\/strong>: 1. The expanded size is incorrect.<\/p>\n\n\n\n

                1. Caused by material rebound<\/li>
                2. Unstable positioning<\/li><\/ol>\n\n\n\n

                  Soluci\u00f3n<\/strong>: 1. Calculate the blank size accurately<\/p>\n\n\n\n

                  1. Increase the calibration process or improve the bending mold forming structure<\/li>
                  2. Change the processing method or increase the process positioning<\/li><\/ol>\n\n\n\n

                    Question: Deformation in the width direction after bending<\/h3>\n\n\n\n

                    Cause<\/strong>: Torsion and deflection caused by inconsistent stretching and shrinking in the width direction of the part<\/p>\n\n\n\n

                    Soluci\u00f3n<\/strong>: 1. Increase bending pressure<\/p>\n\n\n\n

                    1. Increase the calibration process<\/li>
                    2. Ensure that the grain direction of the material and the bending direction have a certain angle<\/li><\/ol>","protected":false},"excerpt":{"rendered":"

                      Sheet metal processing only metal materials use for sheet bending, pressure riveting, welding and a series of treatment processes. The<\/p>","protected":false},"author":1,"featured_media":1333,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[741,742,744],"class_list":["post-1331","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-brake","tag-bending-gap","tag-bending-radius","tag-sheet-bending"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.scoson.com\/wp-content\/uploads\/2020\/07\/22-1.jpg","_links":{"self":[{"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/posts\/1331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/comments?post=1331"}],"version-history":[{"count":0,"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/posts\/1331\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/media\/1333"}],"wp:attachment":[{"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/media?parent=1331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/categories?post=1331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.scoson.com\/es\/wp-json\/wp\/v2\/tags?post=1331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}