Abstract: Provided is a machine tool (1) which is capable of measuring machining accuracy of a workpiece (W) with high accuracy and enables the time required from machining to measurement of machining accuracy to be greatly reduced. The machine tool (1) machining a workpiece (W) while moving a tool and the workpiece (W) relative to each other includes a cover (2) separating from outside a machining area for machining the workpiece (W) therein, and temperature adjusting means (30) used in machining of the workpiece (W) to adjust an ambient temperature of the machining area.

Abstract: A machining state display apparatus includes an achievement degree data storage (9) storing machining condition data relating to each of sets of machining conditions and achievement degree data relating to degrees of achievement of evaluation items to be obtained in machining under each of the sets of machining conditions, with the machining condition data and the achievement degree data being associated with each other, a display part (2) displaying a set of machining conditions and degrees of achievement of the evaluation items corresponding thereto on a display (5), and an input part (6) inputting a signal for selecting one from the evaluation items and a required degree of achievement for the selected evaluation item.

Abstract: Provided is a machine tool (1) which is capable of measuring machining accuracy of a workpiece (W) with high accuracy and enables the time required from machining to measurement of machining accuracy to be greatly reduced. The machine tool (1) machining a workpiece (W) while moving a tool and the workpiece (W) relative to each other includes a cover (2) separating from outside a machining area for machining the workpiece (W) therein, and temperature adjusting means (30) used in machining of the workpiece (W) to adjust an ambient temperature of the machining area.

Abstract: A machining status display apparatus includes an achievement degree data storage storing achievement degree data relating to a degree of achievement of each of predetermined machining-related evaluation items within a range determined by attainable maximum and minimum values of the evaluation item and storing the degrees of achievement of the evaluation items obtained under each of predetermined sets of machining conditions in association with the set of machining conditions, a display part displaying the degrees of achievement of the evaluation items corresponding to a selected set of machining conditions by referring to the data in the achievement degree data storage, and an input part inputting a selection signal for selecting a set of machining conditions. The display part displays the degrees of achievement of the evaluation items obtained under the set of machining conditions corresponding to the selection signal by referring to the data in the achievement degree data storage.

Abstract: A machining state display apparatus includes an achievement degree data storage (9) storing machining condition data relating to each of sets of machining conditions and achievement degree data relating to degrees of achievement of evaluation items to be obtained in machining under each of the sets of machining conditions, with the machining condition data and the achievement degree data being associated with each other, a display part (2) displaying a set of machining conditions and degrees of achievement of the evaluation items corresponding thereto on a display (5), and an input part (6) inputting a signal for selecting one from the evaluation items and a required degree of achievement for the selected evaluation item.

Abstract: A method for adjusting the volume of the combustion chamber of an engine with high accuracy is provided. A cylinder head (200) of an engine includes a recess (204) constituting part of the combustion chamber of the engine, and a mating surface (202) for a cylinder block. The method for adjusting the volume of the combustion chamber includes measuring a plurality of portions of the surface of the recess (204) and a plurality of portions of the mating surface (202) by using a displacement meter, calculating differences between the respective measurement values of the mating surface (202), and the design shape of the mating surface (202) in a state in which the design shape of the surface of the recess (204) is fitted with respect to the respective measurement values of the recess (204), and deciding the cutting amount of the mating surface (202) based on the calculated differences and cutting the mating surface (202) by the decided cutting amount.

Abstract: A machine tool that can output an abnormal noise is provided. A machine tool includes: an input unit configured to receive an input of a setting for defining an operation mode of the machine tool; a storage unit configured to store sound generated during a normal operation of the machine tool and acquired in advance; a sound collection unit configured to collect sound in the machining area; a sound selection unit configured to extract a part of sound collected in the machining area in accordance with the setting input for outputting sound to the outside of the machine tool; and a sound output unit configured to output sound extracted by the sound selection unit to the outside of the machining area.

Abstract: A machining status display apparatus includes an achievement degree data storage storing achievement degree data relating to a degree of achievement of each of predetermined machining-related evaluation items within a range determined by attainable maximum and minimum values of the evaluation item and storing the degrees of achievement of the evaluation items obtained under each of predetermined sets of machining conditions in association with the set of machining conditions, a display part displaying the degrees of achievement of the evaluation items corresponding to a selected set of machining conditions by referring to the data in the achievement degree data storage, and an input part inputting a selection signal for selecting a set of machining conditions. The display part displays the degrees of achievement of the evaluation items obtained under the set of machining conditions corresponding to the selection signal by referring to the data in the achievement degree data storage.

Abstract: In order to adjust the volume of the combustion chamber with high accuracy, a cylinder head 200 includes a recess 204 constituting part of the combustion chamber of the engine and a mating surface for a cylinder block. The recess 204 includes a plurality of openings to which a plurality of specific members are attached respectively. The mating surface 202 is formed to have a cutting stock with respect to three-dimensional shape data of the cylinder head 200 designed to have a target combustion chamber volume. The adjusting method further comprises measuring the surface shape of the recess and the shape of the mating surface around the recess by successively changing the irradiation position of a laser beam using a line laser displacement meter. The adjusting method further comprises removing data of regions equivalent to the plurality of openings from measurement data by comparing the measurement data obtained by the line laser displacement meter with the three-dimensional shape data.

Abstract: A machine tool has a cover body with a window, the window including two spaced window plates defining an airtight space therebetween. The space is brought to a pressure other than atmospheric. An indicator is coupled to the cover body and has an indicator portion that is displaced in response to pressure in the space. The indicating portion is visually observable from outside the machine tool, so that the airtightness of the window may be determined by visually observing the position of the indicating portion.

Abstract: In order to adjust the volume of the combustion chamber with high accuracy, a cylinder head 200 includes a recess 204 constituting part of the combustion chamber of the engine and a mating surface for a cylinder block. The recess 204 includes a plurality of openings to which a plurality of specific members are attached respectively. The mating surface 202 is formed to have a cutting stock with respect to three-dimensional shape data of the cylinder head 200 designed to have a target combustion chamber volume. The adjusting method further comprises measuring the surface shape of the recess and the shape of the mating surface around the recess by successively changing the irradiation position of a laser beam using a line laser displacement meter. The adjusting method further comprises removing data of regions equivalent to the plurality of openings from measurement data by comparing the measurement data obtained by the line laser displacement meter with the three-dimensional shape data.

Abstract: A method for adjusting the volume of the combustion chamber of an engine with high accuracy is provided. A cylinder head (200) of an engine includes a recess (204) constituting part of the combustion chamber of the engine, and a mating surface (202) for a cylinder block. The method for adjusting the volume of the combustion chamber includes measuring a plurality of portions of the surface of the recess (204) and a plurality of portions of the mating surface (202) by using a displacement meter, calculating differences between the respective measurement values of the mating surface (202), and the design shape of the mating surface (202) in a state in which the design shape of the surface of the recess (204) is fitted with respect to the respective measurement values of the recess (204), and deciding the cutting amount of the mating surface (202) based on the calculated differences and cutting the mating surface (202) by the decided cutting amount.

Abstract: A machine tool that can output an abnormal noise is provided. A machine tool includes: an input unit configured to receive an input of a setting for defining an operation mode of the machine tool; a storage unit configured to store sound generated during a normal operation of the machine tool and acquired in advance; a sound collection unit configured to collect sound in the machining area; a sound selection unit configured to extract a part of sound collected in the machining area in accordance with the setting input for outputting sound to the outside of the machine tool; and a sound output unit configured to output sound extracted by the sound selection unit to the outside of the machining area.

Abstract: A machine tool has a cover body with a window, the window including two spaced window plates defining an airtight space therebetween. The space is brought to a pressure other than atmospheric. An indicator is coupled to the cover body and has an indicator portion that is displaced in response to pressure in the space. The indicating portion is visually observable from outside the machine tool, so that the airtightness of the window may be determined by visually observing the position of the indicating portion.