High speed cnc interpolation calculation method

A calculation method and interpolation technology, applied in the direction of electrical program control, digital control, etc., can solve the problems that restrict the high speed and high precision of CNC machining, and the limited calculation speed

Active Publication Date: 2016-08-17
WUXI TONGCHUN NEW ENERGY TECH
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Problems solved by technology

However, no matter which method is used, it is calculated point by point according to the order. The calculation speed of such calculation can only depend on the calculation speed of the computer itself. Obviously, due to the limitation of technical conditions and cost, the calculation speed of the computer is Limited, which restricts the improvement of high-speed and high-precision CNC machining

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[0175] The high-speed CNC interpolation calculation method of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0176] see Figure 7 , the invention discloses a high-speed CNC interpolation calculation method, which is used to control the operation of a numerical control machine tool, which includes a B2B component calculation process based on a unit CU1 calculation process.

[0177] see Figure 4 with Figure 5 , the calculation process of unit CU1 is:

[0178] Put the Bernstein polynomial B(t)=B 0 t+B 1 Data set in (B 0 ,B 1 ) as the input data set is operated in the following way, taking B 0 respectively into and out of port B 0 l and an adder 50 that converts B 1 respectively into and out of port B 0 r and adder 50; adder 50 receives B 0 , B 1 After performing the addition operation, the result B 0 +B 1 sent to the shifter 60, the shifter 60 will B 0 +B 1 The result after shifti...

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Abstract

The invention discloses a high-speed CNC interpolation computing method which is used for controlling operation of a numerically-controlled machine tool. The high-speed CNC interpolation computing method comprises a B2B component computing process based on a unit CU1 computing process. The unit CU1 computing process is that a data set (B0 and B1) in a Bernstein polynomial B(t) = B0t + B1 is used as a data input set, and two output data sets <B01 and B0r> and <B1l and B1r> and a center value B(0.5) are computed through the unit CU1 computing process. The B2B component computing process based on the unit CU1 computing process is that a data set (P0, P1, P2 and P3) in a three-time even spline expression p(t) = P0N0, 3(t) + P1N1, 3(t) + P2N2, 3(t) + P3N3 and 3(t) is used as an input data set, and data output is computed through the B2B component computing process. Then, the data are used as operation control data for controlling operation of the numerically-controlled machine tool. The high-speed CNC interpolation computing method has the advantages that high-speed computing can be achieved, high-accuracy results can be generated, and continuously-developing industrial requirements can be met.

Description

technical field [0001] The invention relates to a calculation method of CNC running data. Background technique [0002] CNC machining is one of the basic processes of contemporary mechanical manufacturing. CNC machining requires the help of CNC machine tools. The CNC system is one of the core components of the CNC machine tool. At present, CNC numerical control is the only form of modern numerical control system. High-speed and high-precision CNC system is the fundamental guarantee for improving processing efficiency and quality. The new reconfigurable technology represented by Field Programmable Gate Array FPGA not only changes the traditional CNC interpolation calculation process but also changes its calculation mode. However, no matter which method is used, it is calculated point by point according to the order. The calculation speed of such calculation can only depend on the calculation speed of the computer itself. Obviously, due to the limitation of technical condi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4103
Inventor 王兴波步建军
Owner WUXI TONGCHUN NEW ENERGY TECH
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