Method and apparatus for controlling feed rate at arcuate portions
AssigneeMakino Milling Machine Co., Ltd.
InventorsJun Yoshida, Akira Kawana, Nobuo Kurisaki
Life of this patent
Estimating the term…
Abstract
A tolerable feed rate is calculated to cause mechanical shock not exceeding a tolerable level in an arcuate machining based on the radius of the path of tool movement at arcuate machining portions and the predetermined tolerable acceleration. A deceleration start timing is set by reference to the end of an arcuate machining and the predetermined deceleration so that the feed rate is lower enough to maintain the tolerable mechanical shock at the end of an arcuate machining. An optimum feed rate is set for arcuate and completely circular machining based on the classification judgment of the arc or complete circle.
Claims22
A feed control method for a numerical control system, including the steps of:
- calculating a tolerable feed rate for a tool which is machining an arcuate portion of a workpiece, the tolerable feed rate being based on the radius of movement of said tool and a predetermined tolerable acceleration or deceleration of said tool;
- and
- setting the actual feed rate for the arcuate portion based on the calculated tolerable feed rate.
A feed rate control method for a numerical control system, including the steps of:
- calculating a tolerable feed rate for a tool which is machining an arcuate portion of a workpiece, the tolerable feed rate being based on the radius of movement of the tool and a predetermined tolerable acceleration or deceleration;
- determining if the actual feed rate of the tool is higher or lower than the calculated tolerable feed rate;
- and
- setting the actual feed rate to the calculated tolerable feed rate if the calculated tolerable feed rate is higher than the actual feed rate.
A feed rate control method for a numerical control system, comprising the steps of:
- determining if the path of movement of a tool operated by the numerical control system is arcuate or entirely circular;
- calculating optimum tolerable feed rates for the arcuate and entirely circular portions, based on the radius of movement of the tool and a predetermined tolerable acceleration or deceleration of the tool;
- and
- controlling the actual feed rates based on the calculated optimum tolerable feed rates.
A feed rate control apparatus for a numerically controlled machining tool, comprising:
- tolerable feed rate calculation means for calculating the tolerable feed rate for the tool to machine an arcuate portion of a workpiece, the calculations being based on radius data of the path of movement of the tool and predetermined tolerable acceleration or deceleration data for the tool;
- and
- feed rate setting means for setting the actual feed rate based on the tolerable feed rate obtained from said tolerable feed rate calculation means.
A feed rate control apparatus for performing a numerically controlled machining of an arcuate portion of a workpiece by a tool, comprising:
- tolerable feed rate calculation means for calculating the tolerable feed rate for machining the arcuate portion, based on radius data of the path of movement of the tool and predetermined tolerable acceleration data;
- comparison means for comparing an actual feed rate with the tolerable feed rate obtained from the tolerable feed rate calculation means;
- and
- feed rate setting means for setting the actual feed rate to the tolerable feed rate when the actual feed rate is different than the tolerable feed rate.
A feed rate control apparatus for a numerically operated tool for machining both arcuate and entirely circular portions of a workpiece, comprising:
- determining means for determining in accordance with data received on the movement of the tool whether the portion of the workpiece being machined is either arcuate or entirely circular;
- tolerable feed rate setting means for calculating the optimum feed rates for both the arcuate and entirely circular portions of the workpiece, based on the radius of movement of the tool and a predetermined tolerable acceleration;
- and
- feed rate setting means for controlling the actual feed rate based on the tolerable feed rate obtained from the tolerable feed rate setting means.
Dependencies are inferred from the claim text.