PRESS2010_EN

1119/1208

evoorGhpedpedevoorGpedevoorGSStt t 0000LW▼CCiftff noneer parcSit）mmh（）mmh（erom ro2C：0.01mmor more（ 0.005）PP3.02 －●Add slanted grooves（N） Range of designation4≦N≦6 For N＝4, refer to drawing above.R（R only）MT lacnhceTataDs・tcudorPTable 3　Processing standard of slanted groovesGroove number and processing directionGroove depth（standard）SlanteddirectionSlantedgroove4.00≦PFor enhance the scrap retention function, slanted grooves addition is available. But the inadequate performance may occur（harder and thinner material, shallower penetration, est.）SRC available round shape and P≧4.0. Add grooves max 6, position can be averagely.How to order・Slanted grooves processing for scrap retention button dies are according to the standard of our company. In addition to button die dimensions, the work piece thickness and the clearance（single side）values are necessary. ・Thickness of working piece MT：0.1mm or more（ 0.01）・Clearance1.00≦P＜4.001.5≦S＜88≦SCode No.SSRーMHD13 －20 －Set the number of shot and leave a piece of scrap in the button die; impose certain load by a jig to push the scrap out and measure the loads.ERDG（Special shaped）A（round）Scrap retention testThe test material are SPCC and SUS304, the diameters of blanking holes for this test areφ3 and φ6 Initially, one piece of scrap was left in the blanking hole of test button die; pushes it out with sufficient load by a jig, and than measure the value of this load. After 1000 shots, use the same test method to measure the load again.Compare these two load values in order to confirm the effect by abrasion for the scrap retention function.■Evaluation methodScrap retentionforce【kgf】Test the improvement of scrap retention function by using alteration SRC（Slanted groove addition）. Apply the same method which was used in the previous test with the blanking hole ofφ6. The test results are shown in the right table.※The clearance is 7% in this test which the different loads was imposed depend on the numbers of groove. The scrap retention function may vary depends on different clearances in actual situation.■Test result】gk【ecro14121086420Initial phase1,000shotSPCC t0.5Diameter ofpunching holeφ3■Test result of addition SRC】gk【ecrof noitneter parcS14121086420Example0.060.050.040.030.020.010.05C：Clearance（mm）With scrapretentionWithout scrapretentionProcessing condition：Clearance 5%, punching frequency 200spmPunching oil is not appliedExampleGroove width（standard）0.60.50.40.30.20.10.10Round：P dimension（mm）Special shaped：Length of straight part（mm）120°90°Number of slantedgrooves：４Number of slantedgrooves：3Groovewidth1234515°or lessProcessing condition：Clearance 7%,punching frequency 200spmPunching oil is not appliedGroove length・angleAdd.CodeSlanted grooves additionSRCMT0.5 －C0.07Initial phase1,000shotInitial phase1,000shotSUS304 t0.5Diameter ofSPCC t0.5Diameter ofpunching holeφ6punching holeφ3111%134%Initial phase1,000shotSPCC t0.5 Diameter ofpunching holeφ6Spec.Processing position　360°／N For round type, P≧4.00 is available only.ClearanceSingle-sidePoint of punchPoint of button dieInitial phase1,000shotSUS304 t0.5Diameter ofpunching holeφ6122%120%Initial phase1,000shotSUS304 t0.5 Diameter ofpunching holeφ61117Addition of slanted grooves（SRC）