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Cup sample blanking Structure Design

Dimensional accuracy of the range. (6), blanking and die handling device to facilitate replacement. (7) easy access, discharge. ( Cool

comply with the laboratory apparatus, equipment characteristics. With this design, we blanking device structure was as follows design. 3 red and punching shear calculation of the power source chosen to take the sample parameters; 65mm,[link widoczny dla zalogowanych], thickness f of a 2.5mm, = 54MPa. Calculated based on the shear punch Public Zhaohong You - Qinhuangdao Bohai Aluminum Industries Co., Ltd. I engineer (Zip code: 066001) Type; P a 1.3r ≈ L ≈ 27503N9 (: material interference shear strength, a 0.8;, |: punching around long). Three sizes of punch diameter is the largest and most thick shear specimen to be washed as 275o3N. We took advantage of the existing laboratory equipment \Blanking device is about the testing machine on the table, by the aircraft hydraulic system transmits power. Chong Pina specimen is complete, the blanking device won from the bench test machine, does not affect the conduct of the work of other performance tests. 4 blanking device bearing bracket bearing frame structure design is the main blanking device, its design should not only consider the bearing strength,[link widoczny dla zalogowanych], but also consider the appearance, size, but also the characteristics of suitable laboratory equipment and the use of aluminum form factor (usually 100ram × 200ram). In this regard, we use the arm support frame structure for supporting the design, shown in Figure 1, and its small size, light weight, take, to facilitate the discharge, but the support stiffness on both sides of the form than the small, in order to solve the problem . We will support planes, bearing arms designed by the distance between two 30mm steel plate composition. Each plate thickness 8ram, width 30ram. Sleeve center support shelf to be met with the base center hole coaxial O +015 ram snow conditions, copper is about to set into the bearing bracket on the base after the center hole and finishing at the same time, to reduce the punching process of bearing bracket deformation return springs on the special design on the mold when exposed to the sample, the return spring is compressed and produces the maximum working load of 488.4N. Pina in the red as mobile bar test piece from the radial force, so Mocha force is negligible. Directly to the spring when pressed most vigorously supporting frame for the 488.4N. Formula based on deflection, in the process of punching the specimen holder sleeve bearing center hole cored with the base generated by the relative offset 0.01mm,[link widoczny dla zalogowanych], therefore, arm bearing frame stiffness of the structure is sufficient to meet the test piece punched accuracy. 34 plus I light Taijin technical I997, Vo1.25, N95 circle blanking device structure l l a marketing nut, 2 a moving rod, a return spring 3, 4, a sleeve, a supporting frame 5, 6, a positioning screws, one on the 7-mode, 8 bit mode blanking device structure and working principle of the overall structure of the blanking device is shown in Figure I, moving the lower bar to the upper die and die sets, with the positioning pin screw tightening, supporting the base frame place the molds on top of positioning mode, the base underneath a (~ 70mm hole, convenient loading and unloading the mold die, but also kept punching down a cup of specimens. When the mobile bar shear force by the punch, the mobile bar compression spring and the upper die moves down. until the completion of punch and lower die with the sample. removed red shear, mobile bar under the action of the spring in the return to the initial position ready to begin the next cycle of different specifications by changing the mold, can punch specimens of different specifications. The device dimensions are: length × width × height = 135mmX100ramX205ram. weight 4.67kg, punching stroke is 25ram. 6 Problems and Solutions of the device has been put into use, each all kinds of specifications to meet the accuracy requirements specimens. The downside is that each specimen specifications were l / 8 around the length of the curling, and in the same location, from other manufacturers of punching the quality of the specimens had a similar problem of view . The reason is: (1) The center of the base support rack sleeve center hole the size of a certain tolerance, mobile rod and sleeve have a certain gap with Taiwan, the other, between the upper die and lower die has a certain gap with Taiwan. so in the punching process, the bound between the upper die and lower die uneven around the gap. In the largest gap is easy to appear at the curling phenomenon (2) The upper die and lower die, respectively, and bearing bracket on the hole, with the next hole location, resulting in the location of the maximum gap is fixed, that is, different specifications of the sample appears both in the same place crimping position. improve the precision bearing bracket,[link widoczny dla zalogowanych], adjust the upper and lower coaxial mode so on around the space evenly between playing chess, a reasonable choice, and with the gap between the lower die can improve the quality of specimen processing. Received: l996 a l0-06 ●

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