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1. 发明申请

WO1989003509A1 METHOD FOR AUTOMATIC COMPENSATION OF PROBE OFFSET IN A COORDINATE MEASURING MACHINE 审中-公开
标题翻译：自动补偿坐标测量机中探头偏差的方法
公开(公告)号：WO1989003509A1
公开(公告)日：1989-04-20
申请号：PCT/US1988003380
申请日：1988-09-30
申请人： BROWN & SHARPE MANUFACTURING CO.
发明人： BROWN & SHARPE MANUFACTURING CO. , DUTLER, Werner
IPC分类号： G01B07/28
CPC分类号： G01B21/045 , G05B19/401 , G05B2219/37043 , G05B2219/37193 , G05B2219/50336
摘要： A method (Figs. 2a, 2c) for automatic probe offset compensation in a machine for measuring coordinates of a workpiece surface (62) by contacting points on the surface (C1, C2 ... Cn) with a probe (60) having a prescribed diameter and sensing and recording the coordinates of the probe. The method can be applied to planar surfaces and circularly curved surfaces. The method includes determining a direction point in space ''D'' just prior to contact with the workpiece surface (22), determining a directional vector Vd between the direction point and the first contact point C1, and determining the angle ''A'' of the directional vector Vd relative to a normal to the surface Vn. When the angle is within a predetermined range of acceptance, the direction point ''D'' is considered valid. In the case of the planar surface, the measured surface S is shifted by the probe offset in a direction opposite the normal vector so that the measured surface and the workpiece surface coincide. The case of a curved surface is also described and follows similar procedures.
摘要翻译：一种在用于通过使表面（C1，C2 ... Cn）上的点接触的用于测量工件表面（62）的坐标的机器中的自动探针偏移补偿的方法（图2a，2c）与具有规定的直径并感测并记录探头的坐标。该方法可应用于平面和圆弧曲面。该方法包括在与工件表面（22）接触之前确定空间“D”中的方向点，确定方向点和第一接触点C1之间的方向矢量Vd，并确定角度“A” 方向矢量Vd相对于表面Vn的法线。当角度在预定的接受范围内时，方向点“D”被认为是有效的。在平坦表面的情况下，测量表面S沿与法向量相反的方向偏移探针偏移，使得测量的表面和工件表面重合。还描述了曲面的情况并遵循类似的过程。

2. 发明申请

WO1989004945A1 CALIBRATION SYSTEM FOR COORDINATE MEASURING MACHINE 审中-公开
标题翻译：坐标测量机校准系统
公开(公告)号：WO1989004945A1
公开(公告)日：1989-06-01
申请号：PCT/US1988003855
申请日：1988-10-31
申请人： BROWN & SHARPE MANUFACTURING CO.
发明人： BROWN & SHARPE MANUFACTURING CO. , BECKWITH, Walter, L., Jr.
IPC分类号： G01B11/00
CPC分类号： G01B11/306 , G01B11/005
摘要： A calibration system for measuring the parametric errors in a coordinate measuring machine having a first element (20) and a table (12) which are movable in three dimensions relative to each other. The apparatus comprises a reflector assembly (28) attachable to the first element (20), a laser measuring assembly (26) attachable to the table (12) for directing a plurality of laser beams at the reflector assembly (28) and for sensing laser beams reflected from the reflector assembly (28) and generating displacement, straightness, pitch, yaw and roll error signals, and means (24) for mounting the laser measuring assembly (26) to the table (12) in three different orientations and for mounting the reflector assembly (28) to the first element (20) in three different orientations. In each of the orientations, the reflector assembly (28) and the laser measuring assembly (26) are aligned for measurement of parametric errors at a plurality of selected positions along the direction of the laser beam. The parametric errors along each direction of movement are stored in a computer. When a part is measured with the machine, the total errors are calculated at each measurement point, and the errors are subtracted from the scale readings.

3. 发明申请

WO1989003505A1 BASE ASSEMBLY FOR COORDINATE MEASURING MACHINE 审中-公开
标题翻译：坐标测量机基座装配
公开(公告)号：WO1989003505A1
公开(公告)日：1989-04-20
申请号：PCT/US1988003379
申请日：1988-09-30
申请人： BROWN & SHARPE MANUFACTURING CO.
发明人： BROWN & SHARPE MANUFACTURING CO. , McCABE, William, J. , PESIKOV, Vitaly, I.
IPC分类号： G01B05/03
CPC分类号： B23Q16/00 , B23Q1/012 , G01B5/0011 , G01B5/004
摘要： A base assembly (25) for a machine tool includes a support arrangement between a metal base (26) and a granite worktable (10) which eliminates distortion caused by differential thermal expansion and contraction and which isolates the base from deformation due to the weight of a workpiece. The support arrangement preferably includes three spaced-apart blocks (34, 36, 38) each with a V-groove (40, 42, 44) attached to the bottom of the granite worktable. The axes of the V-groove tracks intersect at a common point (46). The metal base includes three spherical projections located for engagement in each of the V-groove tracks. The support arrangement permits the granite worktable and the base to expand, contract and distort separately, while providing vertical support and lateral and rotational restraint. Several configurations of tracks and projections are disclosed.

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