{"id":14798,"date":"2022-06-21T06:26:24","date_gmt":"2022-06-21T06:26:24","guid":{"rendered":"https:\/\/pj4iaixa9m.wpdns.site\/?p=14798"},"modified":"2024-02-28T02:06:26","modified_gmt":"2024-02-28T02:06:26","slug":"do-you-know-multi-station-progressive-stamping","status":"publish","type":"post","link":"https:\/\/www.harslepress.com\/vi\/do-you-know-multi-station-progressive-stamping\/","title":{"rendered":"B\u1ea1n c\u00f3 bi\u1ebft D\u1eadp l\u0169y ti\u1ebfn nhi\u1ec1u tr\u1ea1m kh\u00f4ng?"},"content":{"rendered":"\n

<\/span>Estimated reading time: <\/span>12<\/span> minutes<\/span><\/p>\n\n\n\n

Progressive Stamping<\/h2>\n\n\n\n

In order to improve the quality of multi-station progressive stamping<\/a> and reduce the cost of mold manufacturing, the forming processes such as bending, deep drawing, trimming, shaping, and flanging are involved in the stamping<\/a> process of an automobile door guide rail structure and spring back unloading were carried out. <\/p>\n\n\n\n

The finite element numerical simulation is carried out, and the forming defects such as carrier distortion, deep drawing crack, flanging crack, and springback that may occur in the forming process are predicted, the causes of the defects are analyzed, and corresponding solutions or control measures are put forward. <\/p>\n\n\n\n

Re-modeling, the ideal simulation results are obtained. Based on the numerical simulation results, a multi-station progressive stamping test was carried out, and a certain door guide rail structure with qualified forming quality was successfully punched out in one mold, which can meet the requirements of mass production. Progressive Stamping<\/p>\n\n\n\n

\"Figure
Figure 1 Stamping dies<\/figcaption><\/figure>\n\n\n\n

The rapid development of the automobile industry has put forward higher requirements for the production efficiency, parts quality, and parts cost of auto parts. Parts processing has been more and more widely used. However, the quality of multi-station progressive stamping is affected by many factors, such as the geometry of the blank, the form of the carrier, the structure of the mold, the process parameters, etc. <\/p>\n\n\n\n

The mold designed based on experience often causes the parts to wrinkle and crack during the forming process. and springback and other defects, the forming quality is difficult to control, it is necessary to repeatedly try and repair the mold during the manufacturing process, and the product manufacturing cost is high and the cycle is long. <\/p>\n\n\n\n

Through the effective use of numerical simulation methods, the elastic-plastic deformation of the sheet during the forming process can be calculated, the forming defects can be accurately predicted, an optimized forming process or die structure can be obtained, and the forming quality can be finally improved. Progressive Stamping<\/p>\n\n\n\n

Taking a front longitudinal beam reinforcement plate of an automobile as an example, the stamping process of the progressive die is simulated, and the problems such as the deformation of the conveyor belt and the inaccurate unfolding of the blank that may occur in the production are predicted, and the material belt formed by the progressive stamping is optimized. . The full-process finite element numerical simulation of the 13-station stamping forming of a high-strength steel plate automobile mounting seat is carried out.Progressive Stamping<\/p>\n\n\n\n

By correcting the shape of the blank and the convex hull, the problem of easy cracking during forward and reverse drawing is solved, and the forming quality is improved. . But so far, there is no research report on defect prediction and quality control in the whole process of multi-station progressive stamping. <\/p>\n\n\n\n

In this paper, a certain automobile door guide rail structure is taken as the research object, and the finite element modeling of its multi-station progressive stamping forming process and springback unloading is carried out by using Dynaform software, and the possible carriers that may appear in the forming process are completely predicted through numerical simulation. Forming defects such as distortion, deep drawing cracks, flanging cracks, and springback are effectively controlled according to the causes. Progressive Stamping<\/p>\n\n\n\n

Finite Element Modeling And Numerical Simulation<\/strong><\/h3>\n\n\n\n

The schematic diagram of the structural parts of a car door guide rail is shown in Figure 2:Progressive Stamping<\/p>\n\n\n\n

\"Figure
Figure 2 Door rail structural parts<\/figcaption><\/figure>\n\n\n\n

The material is DX53D galvanized sheet with a thickness of 1.2mm. The guide rail structure is used for the electric glass lifter of the car. The curved profile of the part must be consistent with the curvature of the door glass, and the grooves, bayonet, and other local features match with other parts. These parts must ensure good Forming quality and dimensional accuracy. Through the process analysis of the guide rail structural parts, the stamping process scheme of 13 stations, double-sided carriers, double-row layout, and simultaneous stamping of left and right parts is finally determined. The layout design is shown in Figure 3:<\/p>\n\n\n\n

\"Figure
Figure 3 Stamping layout design
1\u2014Punching positive holes and process incisions; 2\u2014Trimming, punching process incisions; 3\u2014Trimming, punching process incisions; 4\u2014Bending-drawing; 5\u2014Punching positioning holes, trimming; Punching; 7- trimming, punching; 8- shaping; 9- shaping, flanging; 10- riveting hole; 11- riveting hole; 12- punching, trimming; 13- cutting and blanking<\/figcaption><\/figure>\n\n\n\n

Establishment of <\/strong>F<\/strong>inite <\/strong>E<\/strong>lement <\/strong>M<\/strong>esh <\/strong>M<\/strong>odel<\/strong><\/strong><\/h3>\n\n\n\n

According to the stamping and forming process of the guide rail structure, the finite element numerical simulation is carried out for the involved bending-deep drawing, segment trimming, shaping, flanging, punching, trimming, and cutting processes. The segmented trimming or punching is built in a model, and the specific simulation process of the progressive stamping forming process is press bending-deep drawing forming \u2192 trimming \u2192 shaping, flanging \u2192 trimming, and cutting. Since the trimming process only removes the material along the trimming line without the simulation process, it is not necessary to establish a mesh model of the punching tool. and 4(b):<\/p>\n\n\n\n

\"Figure
Figure 4 Stamping dies<\/figcaption><\/figure>\n\n\n\n

Numerical <\/strong>S<\/strong>imulation <\/strong>P<\/strong>rocess <\/strong>A<\/strong>nd <\/strong>Q<\/strong>uality <\/strong>C<\/strong>ontrol<\/strong><\/strong><\/h3>\n\n\n\n

According to the simulation process of stamping and forming guide rail structural parts and the established finite element model, the numerical simulation is carried out, the forming defects affecting the product quality in the stamping process are predicted, and the quality control is studied.<\/p>\n\n\n\n