US 4,736,326 AGranted

Numerical control apparatus for grinding machine capable of grinding taper and non-taper portions of workpiece

AssigneeToyoda Koki Kabushiki Kaisha

InventorsHitoshi Akabane, Norio Ohta

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Abstract

A numerical control apparatus which controls a grinding machine that includes a work table for supporting a workpiece, a grinding wheel and a truing device for truing the grinding wheel. The workpiece has taper and non-taper portions to be ground. The numerical control apparatus includes first and second storage means for storing first and second truing programs which respectively define first and second relative movements between the truing device and the grinding wheel to form a taper grinding surface and a non-taper grinding surface on the grinding wheel. The numerical control apparatus executes the first truing program prior to grinding the taper portion of the workpiece and also executes the second truing program after grinding the taper portion.

Claims8

Dependent claims

A numerical control apparatus for controlling a grinding machine which has a wheel head for rotatably supporting a grinding wheel, a work table for rotatably supporting a workpiece having taper and non-taper portions to be ground, said wheel head and said work table being relatively movable to grind said workpiece with said grinding wheel, and a truing device which is movable relative to said wheel head for truing said grinding wheel so as to form a desired grinding surface on a periphery thereof, said numerical control apparatus comprising:

first storage means for storing a first truing program which defines a relative movement between said truing device and said wheel head to form a taper grinding surface on a portion of said grinding wheel which is parallel with a surface of said taper portion of said workpiece;
second storage means for storing a second truing program which defines a relative movement between said truing device and said wheel head to form a non-taper grinding surface on said periphery of said grinding wheel;
third storage means for storing a taper grinding program which defines a relative movement of said wheel head parallel with an ideal final shape of said taper portion so as to execute a rough grinding and finished grinding on said taper portion of said workpiece;
fourth storage means for storing a non-taper grinding program which defines a relative movement of said wheel head so as to grind said non-taper portion of said workpiece;
grinding control means for executing said non-taper grinding program to grind said non-taper portion prior to said taper portion, and then executing said taper grinding program to grind said taper portion of said workpiece;
truing control means for prohibiting execution of said first or second truing programs after grinding of said non-taper portion, and for executing said first truing program after said rough grinding on said taper portion and executing said second truing program after said finish grinding on said taper portion of said workpiece.

3 more elements

A numerical control apparatus for controlling a grinding machine which has a wheel head for rotatably supporting a grinding wheel, a work table for rotatably supporting a workpiece having taper and non-taper portions to be ground, first and second feed means for relatively moving said wheel head and said work table along first and second axes, and a truing device mounted on said work table for truing said grinding wheel to form a desired grinding surface on a periphery thereof, said numerical control apparatus comprising:

first storage means for storing a first truing program which defines a relative movement between said wheel head and work table to form a taper grinding surface parallel with a surface of said taper portion of said workpiece on a portion of said grinding wheel by means of said truing device;
second storage means for storing a second truing program which defines a relative movement between said wheel head and work table to form a non-taper grinding surface on said periphery of said grinding wheel by means of said truing device;
third storage means for storing a taper grinding program which defines a relative movement of said wheel head parallel with an ideal final shape of said taper portion so as to execute a rough grinding and finish grinding on said taper portion of said workpiece;
fourth storage means for storing a non-taper grinding program which defines a relative movement of said wheel head so as to grind said non-taper portion of said workpiece;
grinding control means for executing said non-taper grinding program to grind said non-taper portion prior to said taper portion, and then executing said taper grinding program to grind said taper portion of said workpiece;
truing control means for prohibiting to execute said first or second truing programs after grinding operation on said non-taper portion, and for executing said first truing program after said rough grinding on said taper portion and executing said second truing program after said finish grinding on said taper portion of said workpiece.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/835,264Filed 3 Mar 1986
Priority: JP 60-456196 Mar 1985
Granted: 5 Apr 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B24B 49/18
Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring…
G05B 19/184
Characterised by the machine tool function, e.g. thread cutting, cam making, tool direction control: generation of cam-like surfaces
G05B 2219/36513
Nc in input of data, input key till input tape: select out of a plurality of programs, patterns
G05B 2219/45159
Nc applications: dressing, sharpening, trueing tool