A rim drilling and milling machine has a bottom base, a table, and a clamping unit. The clamping unit is fixed on the table and has a clamping base and multiple clamping members. Each clamping member has at least one jaw each having a jaw body, a clamping groove recessed in the jaw body, and an abutting protrusion formed between a top surface of the jaw body and the clamping groove. A distance defined from a bottom surface of the clamping groove of each of the at least one jaw to a bottom surface of the bottom base ranges from 850 millimeters to 1000 millimeters. The rim drilling and milling machine can firmly and stably clamp a wheel rim, and the wheel rim can be clamped at a position for a user to easily see a processing area of the wheel rim.

A tool part attachment assembly for a tool is disclosed. The tool part attachment assembly has a tool part connector and a line. The tool part connector, which is configured for selectively retaining a tool part, has first and second parts and rolling elements disposed radially therebetween. The first part defines a connecting aperture configured to receive a portion of the tool part, is rotationally fixed relative to the tool part when the tool part is received in the connecting aperture, and is disposed inside the second part. The second part is rotationally connected to the first part. The line has a first end connected to the tool part connector, and a second end. In response to the tool part rotating, the first part rotates with the tool part relative to the second part. A tool part connector and a tool assembly are also disclosed.

Machine chuck jaws, and a related method of manufacture, are provided. The machine chuck jaws are formed from an additive manufacturing process and include one or more gripping pads per chuck jaw. An axial stop is also formed from an additive manufacturing process and provides a flat surface for workpiece placement. The gripping pads equally distribute the clamping pressure, and the additive manufacturing process provides unique shaping capabilities and a honeycomb internal cross-section, thereby achieving a lightweight design. The reduction in weight allows for a decrease in pneumatic pressure used to actuate the jaws, resulting in a corresponding reduction in the clamping pressure which helps improve the form of the workpiece being machined.

A chuck includes a plurality of master jaws 20 that slide in the radial direction in the front surface of a body 10 in conjunction with slide of a plunger 40. The body 10 has a housing chamber 11 communicating with a plurality of keyways 13. The plunger 40 is fitted in the housing chamber 11. Each of the master jaws 20 includes a narrower part 21 and a wider part 22 fitted into an associated one of the keyways 13, and a wedge 23 connected to the plunger 40. The wider part 22 has a flat wider sliding surface 22b radially outside the wedge 23. Each of the keyways 13 has a wider slid surface 14.

A projecting part 11A and a recessed part 12A which engage with each other are formed on a master jaw 11 and a top jaw 12. In the master jaw 11, a movable pin 20 movable in an axial direction and a shaft 30 movable in a radial direction is disposed, and the movable pin 20 is engaged with the shaft so that the movable pin 20 can be moved in the axial direction. The top jaw 12 is provided with a pin hole 12c into which the movable pin 20 can be inserted. The movable pin 20 is locked, by rotating the shaft 30 by a predetermined amount, at a first position in which the movable pin 20 is inserted in the pin hole 12c or at the second position in which the movable pin 20 is extracted from the pin hole 12c.

A chuck includes a plurality of master jaws 20 that slide in the radial direction in the front surface of a body 10 in conjunction with slide of a plunger 40. The body 10 has a housing chamber 11 communicating with a plurality of keyways 13. The plunger 40 is fitted in the housing chamber 11. Each of the master jaws 20 includes a narrower part 21 and a wider part 22 fitted into an associated one of the keyways 13, and a wedge 23 connected to the plunger 40. The wider part 22 has a flat wider sliding surface 22b radially outside the wedge 23. Each of the keyways 13 has a wider slid surface 14.

Intrusion of chips is prevent into gaps formed between inner end surfaces of master jaws and a chuck cover. A top plate is disposed at the center of an end surface of a chuck body. Top covers, which move in conjunction with movements of master jaws when opening and closing the chuck, are disposed in top cover guide recesses formed at three positions on the top plate. Each top cover abuts the center-side end parts of serrated surfaces formed on both widthwise sides of a respective master jaw and the center-side end part of a step section of a stepped claw therebetween, and the top covers close gaps formed at the center-side end parts by the movements of the master jaws at all times by moving in conjunction with movement of the master jaws.

A workpiece clamping device includes a chuck main body, multiple first chuck claws attached to the chuck main body, a second chuck claw attached to the chuck main body, and a driving source configured to move the first chuck claws and the second chuck claw to clamp a workpiece having a rectangular shape, in which the multiple first chuck claws each have a pair of first contact portions, are disposed at positions of different corners, respectively, on a rectangular workpiece, and bring each of the pair of first contact portions into contact with two sides forming the corner to hold the corner, and the second chuck claw has a second contact portion, and is configured to bring the second contact portion into contact with one side of the workpiece to hold the one side of the workpiece.

A chuck mechanism of the present invention includes multiple master jaws placed movably in a radial direction on a front surface of a chuck body, and top jaws each detachably attached to front surfaces of the top jaws. Each master jaw and each top jaw have a raised portion and a recessed portion engageable with each other. Each of the raised and recessed portions has conical surfaces formed by part of a conical body. Each top jaw has a gripping surface formed by part of a circular columnar body. Upon work gripping, the center axes of the conical surfaces on a gripping side among the conical surfaces of each master jaw and each top jaw and the center axis of the gripping surface are all coincident with a rotation axis of the chuck body.

The invention relates to a method for creating a press connection arrangement and a clamping connection, the method including a plurality of steps, as well as a press connection arrangement and a clamping connection per se.