The present invention discloses an automatic carving device for a wheel, mainly consisting of a rack, a chassis, a lifting cylinder, brackets A, bearing blocks, linear bearings, mounting plates, guide shafts, a lifting shaft, a servo motor A, a synchronous pulley A, a connection plate, a synchronous belt, a synchronous pulley B, a pedestal, a connection shaft A, a servo motor B, a shaft sleeve A, a lower end cover, a connection shaft B, a shaft sleeve B, and an oil cylinder. The automatic carving device for the wheel provided by the present invention can meet the requirement of automatically carving characters on the wheel, meanwhile has the characteristics of simple structure, convenience for manufacturing, stable performance and high precision that can meet the machining requirement, and can also meet the requirement of automatic production.

A cylinder case includes a first main path communicating first port with an end surface, a second main path communicating a second port with the end surface, first and second front chamber paths respectively communicating a front chamber with the end surface, and first and second rear chamber paths respectively communicating a rear chamber with the end surface. A manifold block includes a first intermediate path communicating first and second manifold holes opened in an abutting surface with each other and a second intermediate path communicating third and fourth manifold holes opened in the abutting surface. The manifold block configured to be attached and fixed to the cylinder case such that the abutting surface is abutted against the end surface and a relative position of the abutting surface with respect to the end surface portion is capable of being selected from a first position and a second position.

A power chuck includes a housing in which there is arranged a drive unit having a traction guide means moveable in the direction of a clamping axis. There, and there are arranged two pairs of mutually diametrically opposite base jaws. The base jaws are guided radially, in the housing substantially perpendicularly to the clamping axis, and the drive unit is adapted to convert the movement of the traction guide means into the movement of the base jaws. According to the invention, it is proposed that the drive unit for each base jaw has a slider which is in engagement with the base jaw and which is moveable with a movement component on a circular path about the clamping axis.

To provide an automatic chuck greasing device in a crankshaft miller capable of ensuring chuck greasing without missing its timing and preventing failure to remove excess grease by wiping. In a crankshaft miller (1) which cuts, using a rotary cutter (7), a workpiece (2) held by a chuck (3), the automatic greasing device includes: a grease supply device (25) for supplying grease to sliding parts inside a chuck (3) including one between a chuck body (3a) and a chuck jaw (3b) in response to a greasing command signal outputted by a greasing command signal output unit (35) which has received a rotary cutter replacement command signal as a trigger signal from a rotary cutter replacement command signal output unit (33); and a notification means (30a, 30b) for notifying that a cutter (7) needs replacement in response to a notification command signal outputted by a notification command signal output unit (36) which has received the rotary cutter replacement command signal as the trigger signal from a rotary cutter replacement command signal output unit (33).

A clamping device for clamping an article or workpiece to be balanced includes a clamping apparatus for clamping the article. The clamping apparatus has an adjusting device for adjusting the clamping diameter of a clamping body of the clamping apparatus for clamping the article on a placement surface. The clamping body has a disk-shaped spring element sprung in radial direction with a centrally disposed clearance forming at least one spring element cone. The clamping body also has a clamping element inserted into the clearance and having at least one corresponding clamping element cone. The adjusting device has an actuating device for displacing the clamping element relative to the spring element, for moving the cone surfaces of the clamping element cone and the spring element cone relative to one another and for consequently clamping and/or unclamping the spring element in radial direction by the cone surfaces.

A machine tool includes: a hollow spindle including a hollow portion along an axial direction; a plurality of chuck claws openably mounted at a distal end portion of the hollow spindle, and configured to hold a workpiece; an operation rod inserted into the hollow portion of the hollow spindle in a movable manner, and configured to close the plurality of chuck claws with movement of the operation rod toward one side in the axial direction and open the plurality of chuck claws with movement of the operation rod toward the other side in the axial direction; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

A workpiece holding device includes: a chuck including a chuck body, and a plurality of chuck claws openably supported on the chuck body and configured to hold a workpiece; an operation rod configured to drive the plurality of chuck claws for opening and closing with movement of the operation rod; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

A cylinder case includes a first main path communicating first port with an end surface, a second main path communicating a second port with the end surface, first and second front chamber paths respectively communicating a front chamber with the end surface, and first and second rear chamber paths respectively communicating a rear chamber with the end surface. A manifold block includes a first intermediate path communicating first and second manifold holes opened in an abutting surface with each other and a second intermediate path communicating third and fourth manifold holes opened in the abutting surface. The manifold block configured to be attached and fixed to the cylinder case such that the abutting surface is abutted against the end surface and a relative position of the abutting surface with respect to the end surface portion is capable of being selected from a first position and a second position.

A clamping device for clamping an article or workpiece to be balanced includes a clamping apparatus for clamping the article. The clamping apparatus has an adjusting device for adjusting the clamping diameter of a clamping body of the clamping apparatus for clamping the article on a placement surface. The clamping body has a disk-shaped spring element sprung in radial direction with a centrally disposed clearance forming at least one spring element cone. The clamping body also has a clamping element inserted into the clearance and having at least one corresponding clamping element cone. The adjusting device has an actuating device for displacing the clamping element relative to the spring element, for moving the cone surfaces of the clamping element cone and the spring element cone relative to one another and for consequently clamping and/or unclamping the spring element in radial direction by the cone surfaces.

Provided is a retracting chuck that does not rattle even though a moving body can be operated axially, and that enables turning in which the grasp accuracy is increased and vibration and chatter are inhibited. The retracting chuck (100) is provided with: a body (1) comprising a rear body (2) disposed on the axial rear side and a moving body (3) disposed on the axial front side; a plunger (8) moving axially in the body (1); and a master jaw (6) which engages with the plunger (8) and which is caused by a wedge action to move in the radial direction by a slot (3a) formed in the moving body (3). The moving body (3) moves axially relative to the rear body (2). In the rear of body (2), a plate spring (11) is disposed in a bridging manner between seats (2a) provided at a distance from each other, and the plate spring (11) is fastened by a bolt (13) to each of the seats (2a). Between the seats (2a), the plate spring (11) is fastened by a bolt (16) to a seat (3b) of the moving body (3).