公开(公告)号：US06167634A

公开(公告)日：2001-01-02

申请号：US09280049

申请日：1999-03-29

申请人： Heui Jae Pahk ,  Suk Won Lee

发明人： Heui Jae Pahk ,  Suk Won Lee

IPC分类号： G01B712

CPC分类号： B23Q11/0007 ,  B23Q17/2495 ,  G01B5/0014 ,  G05B19/404 ,  G05B2219/37267 ,  G05B2219/49206

摘要： A measurement and compensation system for thermal errors in a machine tool is disclosed. A module is provided to compensate thermal errors of the machine tool. The module comprises an operating part, a data bank, an analog to digital converter, a counter and a digital input/output part. The data bank stores in all the coefficients applied to a thermal error modeling equation which governs a relation between temperatures and thermal errors at various operating conditions. The operating part determines all the coefficients of the thermal error modeling equation which are stored in the data bank and calculates the thermal errors corresponding to the temperatures of a plurality of the thermocouples by the temperatures of a plurality of thermocouples inputted from the A/D converter and the positional coordinates of the bed inputted from the counter. Then, digital data of the calculated thermal errors are inputted into the digital input/output part and the digital input/output part converts the digital data to digital signal to input the digital signals into the controller. A controller orders the machine tool to compensate the thermal errors at the positional coordinates of the bed and the feed of the spindle. Accordingly, since the machine tool compensates the thermal errors in advance, the machine tool processes precisely workpieces in spite of the occurrence of the thermal errors.

摘要翻译： 公开了一种用于机床热误差的测量和补偿系统。 提供了一个模块来补偿机床的热误差。 模块包括操作部分，数据库，模数转换器，计数器和数字输入/输出部分。 数据库存储应用于热误差建模方程的所有系数，其控制各种操作条件下的温度和热误差之间的关系。 操作部分确定存储在数据库中的热误差建模方程的所有系数，并且通过从A / D转换器输入的多个热电偶的温度来计算与多个热电偶的温度相对应的热误差 以及从计数器输入的床的位置坐标。 然后，计算的热误差的数字数据被输入到数字输入/输出部分，数字输入/输出部分将数字数据转换为数字信号，以将数字信号输入到控制器中。 控制器命令机床来补偿床的位置坐标和主轴进给的热误差。 因此，由于机床预先补偿热误差，所以机床精密地处理工件，尽管发生了热误差。