公开(公告)号：US6007280A

公开(公告)日：1999-12-28

申请号：US19102

申请日：1998-02-05

申请人： Kazuhiro Asahi ,  Shigetoshi Masuzawa ,  Takeyoshi Otsu ,  Kouji Sawada

发明人： Kazuhiro Asahi ,  Shigetoshi Masuzawa ,  Takeyoshi Otsu ,  Kouji Sawada

IPC分类号： B22C7/02 ,  G05B19/4099 ,  B23C3/00

CPC分类号： G05B19/4099 ,  G05B2219/35533 ,  G05B2219/37398 ,  G05B2219/45204 ,  G05B2219/49075 ,  Y10T409/303808

摘要： A method for improving dimensional accuracy of a casting pattern. A division block used to form the casting pattern is fixed on a block fixing surface of an NC machine and then the front surface is processed, leaving a stiffness holding portion at a bottom-most portion of the division block. The division block is then turned over and the rear surface is processed, removing the stiffness holding portion. The stiffness holding portion has sufficient thickness to secure stiffness of portions surrounding a through portion, enabling withstanding of a cutting force applied to the rear surface when the division block is turned over and the rear surface processed. Thus, a deviation in position of the tool during processing of the through hole on the rear surface from that of processing of the through hole on the front surface is suppressed.

摘要翻译： 一种用于提高铸造图案的尺寸精度的方法。 用于形成铸造图案的分割块固定在NC机器的块固定面上，然后处理前表面，在分割块的最底部留下刚度保持部。 然后将分割块翻转并且后表面被处理，去除刚度保持部分。 刚度保持部分具有足够的厚度以确保围绕通过部分的部分的刚度，使得能够在分割块翻转并且后表面被处理时承受施加到后表面的切割力。 因此，能够抑制在前表面的贯通孔的后表面的通孔的加工过程中工具的位置偏离与前表面的贯通孔的加工位置的偏差。