Tool presetter and tool offset amount calculation method
First Claim
1. A tool presetter to be mounted in a machine tool having a pivotal tool spindle stock, the tool presetter comprising:
- a presetter sensor provided at a predetermined position; and
control means which determines machine coordinate values of the tool spindle stock when a nose of a tool attached to the tool spindle stock is in contact with the presetter sensor and, on the basis of the machine coordinate values and a pivot angle of the tool spindle stock detected when the tool nose is in contact with the presetter sensor, calculates a reference tool offset amount as measured along an axis with the tool spindle stock being set to position a tool spindle parallel to the axis.
1 Assignment
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Accused Products
Abstract
A tool presetter and a tool offset amount calculation method are provided which ensure easy and accurate determination of reference tool offset amounts in a machine tool having a pivotal tool spindle stock. The tool presetter is mounted in a composite lathe having a pivotal tool spindle stock 17. The tool presetter calculates tool offset amounts Oz (=A−Zm), Ox (=B−Xm) on the basis of machine coordinate values Zm, Xm of the tool spindle stock detected when a nose of a tool T is in contact with Z-axis and X-axis detection points of a presetter sensor 18 with the tool spindle stock 17 pivoted by a pivot angle α, and machine coordinate values A, B of the Z-axis and X-axis detection points of the presetter sensor 18, and calculates reference tool offset amounts Lz, Lx from predetermined expressions on the basis of the tool offset amounts Ox, Oz and the pivot angle α of the tool spindle stock 17.
5 Citations
8 Claims
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1. A tool presetter to be mounted in a machine tool having a pivotal tool spindle stock, the tool presetter comprising:
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a presetter sensor provided at a predetermined position; and
control means which determines machine coordinate values of the tool spindle stock when a nose of a tool attached to the tool spindle stock is in contact with the presetter sensor and, on the basis of the machine coordinate values and a pivot angle of the tool spindle stock detected when the tool nose is in contact with the presetter sensor, calculates a reference tool offset amount as measured along an axis with the tool spindle stock being set to position a tool spindle parallel to the axis. - View Dependent Claims (2, 3, 4, 5)
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6. A tool offset amount calculation method for use in a machine tool having a pivotal tool spindle stock to which a tool is attached, the method comprising the steps of:
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if it is impossible to bring a nose of the tool into contact with a presetter sensor provided at a predetermined position with the tool spindle stock being set to position a tool spindle parallel to an axis, determining machine coordinate values of the tool spindle stock when the tool nose is in contact with the presetter sensor after the tool spindle stock is pivoted by a pivot angle from a position at which the tool spindle is parallel to the axis to bring the tool nose into contact with the presetter sensor; and
calculating a reference tool offset amount as measured along the axis with the tool spindle stock being set to position the tool spindle parallel to the axis on the basis of the machine coordinate values and the pivot angle of the tool spindle stock. - View Dependent Claims (7, 8)
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Specification