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    • 4. 发明申请
    • APPARATUS FOR PRODUCING A BLANK FROM STOCK MATERIAL
    • 用于从原料生产空白的装置
    • WO1991017005A1
    • 1991-11-14
    • PCT/US1990002358
    • 1990-04-27
    • ACE TECHNOLOGY CORPORATION
    • ACE TECHNOLOGY CORPORATIONBENNETT, Edward, D.
    • B21D45/02
    • B21D45/006Y10T83/173Y10T83/2122Y10T83/2133
    • An improvement to a stamping press having a blanking punch and die combination comprising a blanking die (52) defining an opening, a cooperating blanking punch (50), dimensioned closely to mate with the opening wherein the die edge defining the opening is radiused to cause metal flow, a stock engaging shedder (74) displaceable within the die opening to engage and clamp stock (122) and a stripper (86) encircling the blanking punch (50) and displaceable therealong to remove surplus stock after a blanking operation. The improvement comprises the stripper (86) being disposed to engage and clamp stock (122) being punched by the blanking punch and die. Additionally, there is a variable pressure source (104, 108, 110, 120) connected to cause the stripper (86) to engage and clamp the stock (122) during punching of the stock under a pressure low enough to permit the stock to flow away from the blanking punch (50) and high enough to prevent the stock from bending and to cause the stripper to (86) exert sufficient force on the stock (122) following punching of the stock to strip the stock from the blanking punch (50). The preferred variable pressure source comprises a piston (104) connected between the stripper (86) and a fixed point (94) and a variable pressure source (110) operably connected to the piston. The variable pressure can be set for different types and thicknesses of material.
    • 具有冲裁冲头和模具组合的冲压机的改进包括限定开口的冲裁模具(52),配合冲裁冲头(50),其尺寸设计成与开口相配合,其中限定开口的模具边缘被倒圆形成 金属流动,可在模具开口内移动的坯料接合脱落器(74),以接合和夹紧环绕冲切冲头(50)的料仓(122)和剥离器(86),并沿着可移位的方式在冲裁操作之后移除剩余的料料。 该改进包括脱模器(86)被设置成接合和夹紧由冲切冲头和冲头冲压的坯料(122)。 另外,连接有可变压力源(104,108,110,120),以使得在压力足够低以允许原料流动的情况下在冲压坯料期间使脱模剂(86)接合和夹紧坯料(122) 远离冲裁冲头(50)并且足够高以防止坯料弯曲并且使得剥离器(86)在冲压坯料之后对坯料(122)施加足够的力以从坯料冲切(50) )。 优选的可变压力源包括连接在汽提器(86)和可操作地连接到活塞的固定点(94)和可变压力源(110)之间的活塞(104)。 可以为不同类型和厚度的材料设定可变压力。