Kitamura Machinery Co., Ltd.

Other

Koichiro Kitamura

Shigeru Yamada

Katsuji Taniguchi

Akihiro Kitamura

Kosaku Kitamura

A NC machine tool having a constitution in which a table ( ) for placing a work thereon and a spindle ( ) for setting a tool are relatively moved by three feed mechanisms ( ), for X-axis, for Y-axis, and for Z-axis, to carry out machining. A preload is applied to all the three feed mechanisms ( ), for X-axis, for Y-axis, and for Z-axis, using a rack-pinion ( ), and using two motors ( ) for each axis to prevent backlash in the rack-pinion.

NC machine tool

A preload control apparatus comprising a bearing 16-19 and at least one coned disc spring 26 for exerting a preload on the bearing, one or some or all of the coned disc spring(s) being at least partly made of a shape memory alloy so that the preload on the bearing can be adjusted with changes in temperature of the coned disc spring(s).

Preload control apparatus for bearings

Machine tool

A pallet changer includes at least one pallet (4, 14) for holding a workpiece (5, 15); a first guide (41) for guiding the pallet (4, 14); a first support (2) for supporting the first guide (41); a second guide (51) for guiding the pallet (4, 14); a second support (30) for supporting the second guide (51); a first linear motor (40) associated with the first guide (41); a second linear motor (50) associated with the second guide (51). The pallet (4, 14) is made of conductive material so as to serve as a secondary conductor for the first linear motor (40) and the second linear motor (50) for performing changing of the pallet (4, 14) between the first linear motor (40) and the second linear motor (50) along a desired direction (Y).

Pallet changer

A machine tool comprises: (a) a tool (22); (b) a body (2); (c) a tool supporting means (10) for supporting the tool (22) provided relative to the body (2); (d) a means (4) for supporting a pallet (P) for setting a work (W), the support means (36, 35) being provided relative to the body (2); (e) a first moving means (31, 32, 32a, 33, 34, 37, 39) for moving the means (4) about a center axis (U2) along a first direction (B1, B2); and (f) a second moving means (11, 12, 13, 14, 15, 16, 17, 18, 19, 20) for moving the tool supporting means (10) so as to cause relative motion between the tool supporting means (10) and the means (4) for performing machining operation of the work (W).

A manual pallet changer for performing a loading operation and an unloading operation for a pallet between a table of a machine tool and a pallet magazine comprising a clamp for clamping the pallet to the table of the machine tool. The pallet magazine connected to the machine tool by an opening and closing joint, the pallet magazine as a whole being rotatable about a supporting point of the opening and closing joint; and the pallet magazine having first guide rails arranged alone a longitudinal direction of the pallet magazine in two rows; second guide rails arranged along a direction different from the longitudinal direction in two rows; movable guide rails arranged along the longitudinal direction in two rows, the movable guide rails being movable between an upper position and a lower position; and a lift for moving up and down the movable guide rails.

Manual pallet changer

A machine tool includes a table (24) movable in a first direction and a second direction for supporting a work holder (H), a work storage magazine (3) for storing a plurality of work holders (H), and a work changer for transferring work holders (H) between the work storage magazine (3) and the table (24). The axis of the work holder (H) supported in the table (24) is directed in a horizontal direction. Each axis of the work holders (H) stored in the work magazine (3) is directed in a vertical direction. The work changer (5) comprises: a frame (70); a vertical shaft (71) fixedly mounted on the frame (70), the vertical shaft (71) having a first bevel gear (74) fixed thereto; a casing (72) rotatably supported on the vertical shaft (71); a drive device (76-78) for rotating the casing (72) about the vertical shaft (71); a horizontal shaft rotatably mounted on the casing (72), the horizontal shaft having a second bevel gear (83) engaging with the first bevel gear (74); a finger frame (80) connected to the horizontal shaft (8); a finger unit (5a) mounted on the finger frame (80) and rotatable about its rotation axis, the finger unit (5a) having two pairs of fingers (86b, 86a) each of which grips a work holder (H), the two pairs of fingers (86b, 86a) being arranged symmetrically about the rotation axis of the finger unit (5a); and a drive device for rotating the finger unit (5a). The gear ratio of the second bevel gear (83) to the first bevel gear (74) is 2/1 so that when the casing (72) is rotated about the vertical shaft (71) by 180 degrees the second bevel gear (83) is rotated by 90 degrees.

Work changer

A preload control apparatus for use in a spindle (12) of a machine tool comprises a bearing (16,17) and a plurality of springs (26a to 26d) for exerting a preload on the bearing (16, 17). Some or all of the springs (26a to 26d) are at least partly made of a shape memory alloy so that the preload on the bearing (16,17) can be adjusted with changes in temperature of the springs (26a to 26d).

Preload control apparatus for bearings with shape memory alloy springs

This invention relates to a pallet changer suitable for use with a machine tool. When exchanging pallets, the pallet changer employs a drive means 3 for driving a table 2, and a transfer means 12 comprising a chain 66 and sprockets 64, 65. The transfer means 12 is driven by the drive means 3, and the pallet 4 is moved in the same direction as the table 2.

A pallet magazine for setting a plurality of pallets including a column and a plurality of swing units mounted on the column. A turntable as driven about a horizontal axis and including a plurality of rails for receiving the pallet. An indexing member securing the turntable at a desired position.

Pallet magazine

Apparatus and method for sensing a thrust load applied to a spindle of a

A machine tool has a machine tool body (3), a spindle (1) having a supporting portion (2) and being rotatably supported by the machine tool body (3), and a tool holder (5) having an inserting portion (6) attached to the supporting portion (2). A coating layer (10) made of a hard material including titanium is provided on the supporting portion (2) of the spindle (1) and/or the inserting portion (6) of the tool holder (5).

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Takaoka, Japan

Koichiro Kitamura